diff --git a/.licenses/semantic/cabal/ghc-boot-th.txt b/.licenses/semantic/cabal/ghc-boot-th.txt
index bbbe5c228..8f2819873 100644
--- a/.licenses/semantic/cabal/ghc-boot-th.txt
+++ b/.licenses/semantic/cabal/ghc-boot-th.txt
@@ -1,9 +1,9 @@
 ---
 type: cabal
 name: ghc-boot-th
-version: 8.6.3
+version: 8.6.4
 summary: Shared functionality between GHC and the @template-haskell@
-homepage: 
+
 license: bsd-3-clause
 ---
 The Glasgow Haskell Compiler License
diff --git a/.licenses/semantic/cabal/ghc-boot.txt b/.licenses/semantic/cabal/ghc-boot.txt
index c715656ea..0084942f2 100644
--- a/.licenses/semantic/cabal/ghc-boot.txt
+++ b/.licenses/semantic/cabal/ghc-boot.txt
@@ -1,9 +1,9 @@
 ---
 type: cabal
 name: ghc-boot
-version: 8.6.3
+version: 8.6.4
 summary: Shared functionality between GHC and its boot libraries
-homepage: 
+
 license: bsd-3-clause
 ---
 The Glasgow Haskell Compiler License
diff --git a/.licenses/semantic/cabal/ghc-heap.txt b/.licenses/semantic/cabal/ghc-heap.txt
index 8a0529d93..fbde5f4e0 100644
--- a/.licenses/semantic/cabal/ghc-heap.txt
+++ b/.licenses/semantic/cabal/ghc-heap.txt
@@ -1,9 +1,9 @@
 ---
 type: cabal
 name: ghc-heap
-version: 8.6.3
+version: 8.6.4
 summary: Functions for walking GHC's heap
-homepage: 
+
 license: bsd-3-clause
 ---
 Copyright (c) 2012-2013, Joachim Breitner
diff --git a/.licenses/semantic/cabal/ghc.txt b/.licenses/semantic/cabal/ghc.txt
index d6371ff42..46b589aa3 100644
--- a/.licenses/semantic/cabal/ghc.txt
+++ b/.licenses/semantic/cabal/ghc.txt
@@ -1,7 +1,7 @@
 ---
 type: cabal
 name: ghc
-version: 8.6.3
+version: 8.6.4
 summary: The GHC API
 homepage: https://www.haskell.org/ghc/
 license: bsd-3-clause
diff --git a/.licenses/semantic/cabal/ghci.txt b/.licenses/semantic/cabal/ghci.txt
index 6d8722ae5..6a2628b6f 100644
--- a/.licenses/semantic/cabal/ghci.txt
+++ b/.licenses/semantic/cabal/ghci.txt
@@ -1,9 +1,9 @@
 ---
 type: cabal
 name: ghci
-version: 8.6.3
+version: 8.6.4
 summary: The library supporting GHC's interactive interpreter
-homepage: 
+
 license: bsd-3-clause
 ---
 The Glasgow Haskell Compiler License
diff --git a/.licenses/semantic/cabal/http-types.txt b/.licenses/semantic/cabal/http-types.txt
index 69998e84f..f2be57f9f 100644
--- a/.licenses/semantic/cabal/http-types.txt
+++ b/.licenses/semantic/cabal/http-types.txt
@@ -1,7 +1,7 @@
 ---
 type: cabal
 name: http-types
-version: 0.12.2
+version: 0.12.3
 summary: Generic HTTP types for Haskell (for both client and server code).
 homepage: https://github.com/aristidb/http-types
 license: bsd-3-clause
diff --git a/.licenses/semantic/cabal/process.txt b/.licenses/semantic/cabal/process.txt
index a8172524d..7ff425efc 100644
--- a/.licenses/semantic/cabal/process.txt
+++ b/.licenses/semantic/cabal/process.txt
@@ -1,9 +1,9 @@
 ---
 type: cabal
 name: process
-version: 1.6.3.0
+version: 1.6.5.0
 summary: Process libraries
-homepage: 
+
 license: bsd-3-clause
 ---
 This library (libraries/process) is derived from code from two
diff --git a/.licenses/semantic/cabal/recursion-schemes.txt b/.licenses/semantic/cabal/recursion-schemes.txt
index 662bb4153..b5e68fef1 100644
--- a/.licenses/semantic/cabal/recursion-schemes.txt
+++ b/.licenses/semantic/cabal/recursion-schemes.txt
@@ -1,7 +1,7 @@
 ---
 type: cabal
 name: recursion-schemes
-version: 5.1.1
+version: 5.1.2
 summary: Generalized bananas, lenses and barbed wire
 homepage: https://github.com/ekmett/recursion-schemes/
 license: bsd-2-clause
diff --git a/.licenses/semantic/cabal/th-abstraction.txt b/.licenses/semantic/cabal/th-abstraction.txt
index 7660bdd7c..f590fe449 100644
--- a/.licenses/semantic/cabal/th-abstraction.txt
+++ b/.licenses/semantic/cabal/th-abstraction.txt
@@ -1,7 +1,7 @@
 ---
 type: cabal
 name: th-abstraction
-version: 0.2.10.0
+version: 0.2.11.0
 summary: Nicer interface for reified information about data types
 homepage: https://github.com/glguy/th-abstraction
 license: isc
diff --git a/.licenses/semantic/cabal/transformers.txt b/.licenses/semantic/cabal/transformers.txt
index 7ab55c2b2..d000945ac 100644
--- a/.licenses/semantic/cabal/transformers.txt
+++ b/.licenses/semantic/cabal/transformers.txt
@@ -1,9 +1,9 @@
 ---
 type: cabal
 name: transformers
-version: 0.5.5.0
+version: 0.5.6.2
 summary: Concrete functor and monad transformers
-homepage: 
+
 license: bsd-3-clause
 ---
 The Glasgow Haskell Compiler License
diff --git a/semantic.cabal b/semantic.cabal
index 45e6cf5df..d52117647 100644
--- a/semantic.cabal
+++ b/semantic.cabal
@@ -54,6 +54,7 @@ common dependencies
                      , network
                      , recursion-schemes
                      , scientific
+                     , safe-exceptions
                      , semilattices
                      , text
                      , these
diff --git a/src/Control/Abstract/Primitive.hs b/src/Control/Abstract/Primitive.hs
index 4880c787f..cbfc49e67 100644
--- a/src/Control/Abstract/Primitive.hs
+++ b/src/Control/Abstract/Primitive.hs
@@ -45,9 +45,9 @@ defineBuiltIn declaration rel accessControl value = withCurrentCallStack callSta
   -- TODO: This span is still wrong.
   declare declaration rel accessControl emptySpan ScopeGraph.Unknown (Just associatedScope)
 
-  param <- gensym
   withScope associatedScope $ do
-    declare (Declaration param) rel accessControl emptySpan ScopeGraph.Unknown Nothing
+    param <- gensym
+    declare (Declaration param) ScopeGraph.Gensym accessControl emptySpan ScopeGraph.Unknown Nothing
 
   slot <- lookupSlot declaration
   value <- builtIn associatedScope value
diff --git a/src/Control/Abstract/ScopeGraph.hs b/src/Control/Abstract/ScopeGraph.hs
index 937248db1..a4c8eae92 100644
--- a/src/Control/Abstract/ScopeGraph.hs
+++ b/src/Control/Abstract/ScopeGraph.hs
@@ -3,6 +3,7 @@
 module Control.Abstract.ScopeGraph
   ( lookup
   , declare
+  , declareMaybeName
   , reference
   , newScope
   , newPreludeScope
@@ -79,6 +80,27 @@ declare decl rel accessControl span kind scope = do
   moduleInfo <- ask @ModuleInfo
   modify (fst . ScopeGraph.declare decl moduleInfo rel accessControl span kind scope currentAddress)
 
+-- | If the provided name is 'Nothing' we want to reflect that the declaration's name was a generated name (gensym).
+-- We use the 'Gensym' relation to indicate that. Otherwise, we use the provided 'relation'.
+declareMaybeName :: ( Carrier sig m
+                    , Member (State (ScopeGraph address)) sig
+                    , Member (Reader (CurrentScope address)) sig
+                    , Member (Reader ModuleInfo) sig
+                    , Member Fresh sig
+                    , Ord address
+                    )
+                 => Maybe Name
+                 -> Relation
+                 -> AccessControl
+                 -> Span
+                 -> Kind
+                 -> Maybe address
+                 -> Evaluator term address value m Name
+declareMaybeName maybeName relation ac span kind scope = do
+  case maybeName of
+    Just name -> declare (Declaration name) relation ac span kind scope >> pure name
+    _         -> gensym >>= \name -> declare (Declaration name) Gensym ac span kind scope >> pure name
+
 putDeclarationScope :: ( Ord address
                        , Member (Reader (CurrentScope address)) sig
                        , Member (State (ScopeGraph address)) sig
diff --git a/src/Control/Effect/Catch.hs b/src/Control/Effect/Catch.hs
index 3d98a269d..a4d9ee3b9 100644
--- a/src/Control/Effect/Catch.hs
+++ b/src/Control/Effect/Catch.hs
@@ -6,6 +6,7 @@
 module Control.Effect.Catch
   ( Catch (..)
   , catch
+  , catchSync
   , runCatch
   , CatchC (..)
   ) where
@@ -14,6 +15,7 @@ import           Control.Effect.Carrier
 import           Control.Effect.Reader
 import           Control.Effect.Sum
 import qualified Control.Exception as Exc
+import           Control.Exception.Safe (isSyncException)
 import           Control.Monad.IO.Class
 
 data Catch m k
@@ -39,6 +41,16 @@ catch :: (Member Catch sig, Carrier sig m, Exc.Exception e)
         -> m a
 catch go cleanup = send (CatchIO go cleanup pure)
 
+catchSync :: (Member Catch sig, Carrier sig m, Exc.Exception e, MonadIO m)
+          => m a
+          -> (e -> m a)
+          -> m a
+catchSync f g = f `catch` \e ->
+  if isSyncException e
+      then g e
+      -- intentionally rethrowing an async exception synchronously,
+      -- since we want to preserve async behavior
+      else liftIO (Exc.throw e)
 
 -- | Evaulate a 'Catch' effect.
 runCatch :: (forall x . m x -> IO x)
diff --git a/src/Data/Abstract/Evaluatable.hs b/src/Data/Abstract/Evaluatable.hs
index f0ce97e3d..8f1c9a304 100644
--- a/src/Data/Abstract/Evaluatable.hs
+++ b/src/Data/Abstract/Evaluatable.hs
@@ -30,7 +30,7 @@ import Data.Abstract.Declarations as X
 import Data.Abstract.FreeVariables as X
 import Data.Abstract.Module
 import Data.Abstract.Name as X
-import qualified Data.Abstract.ScopeGraph as ScopeGraph 
+import qualified Data.Abstract.ScopeGraph as ScopeGraph
 import Data.Abstract.ScopeGraph (Relation(..))
 import Data.Abstract.AccessControls.Class as X
 import Data.Language
@@ -192,7 +192,7 @@ defineSelf :: ( Carrier sig m
            => Evaluator term address value m ()
 defineSelf = do
   let self = Declaration X.__self
-  declare self Default Public emptySpan ScopeGraph.Unknown Nothing
+  declare self ScopeGraph.Gensym Public emptySpan ScopeGraph.Unknown Nothing
   slot <- lookupSlot self
   assign slot =<< object =<< currentFrame
 
diff --git a/src/Data/Abstract/ScopeGraph.hs b/src/Data/Abstract/ScopeGraph.hs
index 950a14d12..096099a78 100644
--- a/src/Data/Abstract/ScopeGraph.hs
+++ b/src/Data/Abstract/ScopeGraph.hs
@@ -86,7 +86,7 @@ instance Ord AccessControl where
   (<=) Public _            = False
 
 
-data Relation = Default | Instance | Prelude
+data Relation = Default | Instance | Prelude | Gensym
   deriving (Eq, Show, Ord, Generic, NFData)
 
 instance Lower Relation where
diff --git a/src/Data/Syntax/Declaration.hs b/src/Data/Syntax/Declaration.hs
index 257a50de0..c477e8577 100644
--- a/src/Data/Syntax/Declaration.hs
+++ b/src/Data/Syntax/Declaration.hs
@@ -28,15 +28,10 @@ instance Diffable Function where
 
 instance Evaluatable Function where
   eval _ _ Function{..} = do
-    name <- maybeM (throwNoNameError functionName) (declaredName functionName)
     span <- ask @Span
-    associatedScope <- declareFunction name ScopeGraph.Public span ScopeGraph.Function
+    (name, associatedScope) <- declareFunction (declaredName functionName) ScopeGraph.Public span ScopeGraph.Function
 
-    params <- withScope associatedScope . for functionParameters $ \paramNode -> do
-      param <- maybeM (throwNoNameError paramNode) (declaredName paramNode)
-
-      let paramSpan = getSpan paramNode
-      param <$ declare (Declaration param) Default ScopeGraph.Public paramSpan ScopeGraph.Parameter Nothing
+    params <- withScope associatedScope . for functionParameters $ \paramNode -> declareMaybeName (declaredName paramNode) Default ScopeGraph.Public (getSpan paramNode) ScopeGraph.Parameter Nothing
 
     addr <- lookupSlot (Declaration name)
     v <- function name params functionBody associatedScope
@@ -50,17 +45,17 @@ declareFunction :: ( Carrier sig m
                    , Member Fresh sig
                    , Ord address
                    )
-                => Name
+                => Maybe Name
                 -> ScopeGraph.AccessControl
                 -> Span
                 -> ScopeGraph.Kind
-                -> Evaluator term address value m address
+                -> Evaluator term address value m (Name, address)
 declareFunction name accessControl span kind = do
   currentScope' <- currentScope
   let lexicalEdges = Map.singleton Lexical [ currentScope' ]
   associatedScope <- newScope lexicalEdges
-  declare (Declaration name) Default accessControl span kind (Just associatedScope)
-  pure associatedScope
+  name' <- declareMaybeName name Default accessControl span kind (Just associatedScope)
+  pure (name', associatedScope)
 
 instance Tokenize Function where
   tokenize Function{..} = within' Scope.Function $ do
@@ -92,16 +87,13 @@ instance Diffable Method where
 -- local environment.
 instance Evaluatable Method where
   eval _ _ Method{..} = do
-    name <- maybeM (throwNoNameError methodName) (declaredName methodName)
     span <- ask @Span
-    associatedScope <- declareFunction name methodAccessControl span ScopeGraph.Method
+    (name, associatedScope) <- declareFunction (declaredName methodName) methodAccessControl span ScopeGraph.Method
 
     params <- withScope associatedScope $ do
       -- TODO: Should we give `self` a special Relation?
-      declare (Declaration __self) Prelude ScopeGraph.Public emptySpan ScopeGraph.Unknown Nothing
-      for methodParameters $ \paramNode -> do
-        param <- maybeM (throwNoNameError paramNode) (declaredName paramNode)
-        param <$ declare (Declaration param) Default ScopeGraph.Public span ScopeGraph.Parameter Nothing
+      declare (Declaration __self) ScopeGraph.Prelude ScopeGraph.Public emptySpan ScopeGraph.Unknown Nothing
+      for methodParameters $ \paramNode -> declareMaybeName (declaredName paramNode) Default ScopeGraph.Public (getSpan paramNode) ScopeGraph.Parameter Nothing
 
     addr <- lookupSlot (Declaration name)
     v <- function name params methodBody associatedScope
@@ -144,9 +136,8 @@ instance Declarations1 RequiredParameter where
 -- TODO: Implement Eval instance for RequiredParameter
 instance Evaluatable RequiredParameter where
   eval _ _ RequiredParameter{..} = do
-    name <- maybeM (throwNoNameError requiredParameter) (declaredName requiredParameter)
     span <- ask @Span
-    declare (Declaration name) Default ScopeGraph.Public span ScopeGraph.RequiredParameter Nothing
+    _ <- declareMaybeName (declaredName requiredParameter) Default ScopeGraph.Public span ScopeGraph.RequiredParameter Nothing
     unit
 
 
@@ -170,9 +161,8 @@ instance Evaluatable VariableDeclaration where
   eval _    _ (VariableDeclaration [])   = unit
   eval eval _ (VariableDeclaration decs) = do
     for_ decs $ \declaration -> do
-      name <- maybeM (throwNoNameError declaration) (declaredName declaration)
-      let declarationSpan = getSpan declaration
-      declare (Declaration name) Default ScopeGraph.Public declarationSpan ScopeGraph.VariableDeclaration Nothing
+      let span = getSpan declaration
+      _ <- declareMaybeName (declaredName declaration) Default ScopeGraph.Public span ScopeGraph.VariableDeclaration Nothing
       eval declaration
     unit
 
@@ -209,10 +199,8 @@ data PublicFieldDefinition a = PublicFieldDefinition
 instance Evaluatable PublicFieldDefinition where
   eval eval _ PublicFieldDefinition{..} = do
     span <- ask @Span
-    propertyName <- maybeM (throwNoNameError publicFieldPropertyName) (declaredName publicFieldPropertyName)
-
-    declare (Declaration propertyName) Instance publicFieldAccessControl span ScopeGraph.PublicField Nothing
-    slot <- lookupSlot (Declaration propertyName)
+    name <- declareMaybeName (declaredName publicFieldPropertyName) Instance publicFieldAccessControl span ScopeGraph.PublicField Nothing
+    slot <- lookupSlot (Declaration name)
     value <- eval publicFieldValue
     assign slot value
     unit
@@ -236,12 +224,13 @@ instance Diffable Class where
 
 instance Evaluatable Class where
   eval eval _ Class{..} = do
-    name <- maybeM (throwNoNameError classIdentifier) (declaredName classIdentifier)
     span <- ask @Span
     currentScope' <- currentScope
 
     superScopes <- for classSuperclasses $ \superclass -> do
-      name <- maybeM (throwNoNameError superclass) (declaredName superclass)
+      name <- case declaredName superclass of
+                Just name -> pure name
+                Nothing   -> gensym
       scope <- associatedScope (Declaration name)
       slot <- lookupSlot (Declaration name)
       superclassFrame <- scopedEnvironment =<< deref slot
@@ -253,7 +242,7 @@ instance Evaluatable Class where
         current = (Lexical, ) <$> pure (pure currentScope')
         edges = Map.fromList (superclassEdges <> current)
     classScope <- newScope edges
-    declare (Declaration name) Default ScopeGraph.Public span ScopeGraph.Class (Just classScope)
+    name <- declareMaybeName (declaredName classIdentifier) Default ScopeGraph.Public span ScopeGraph.Class (Just classScope)
 
     let frameEdges = Map.singleton Superclass (Map.fromList (catMaybes superScopes))
     classFrame <- newFrame classScope frameEdges
@@ -323,13 +312,11 @@ data TypeAlias a = TypeAlias { typeAliasContext :: ![a], typeAliasIdentifier ::
 
 instance Evaluatable TypeAlias where
   eval _ _ TypeAlias{..} = do
-    name <- maybeM (throwNoNameError typeAliasIdentifier) (declaredName typeAliasIdentifier)
+    -- This use of `throwNoNameError` is good -- we aren't declaring something new so `declareMaybeName` is not useful here.
     kindName <- maybeM (throwNoNameError typeAliasKind) (declaredName typeAliasKind)
-
     span <- ask @Span
     assocScope <- associatedScope (Declaration kindName)
-    -- TODO: Should we consider a special Relation for `TypeAlias`?
-    declare (Declaration name) Default ScopeGraph.Public span ScopeGraph.TypeAlias assocScope
+    name <- declareMaybeName (declaredName typeAliasIdentifier) Default ScopeGraph.Public span ScopeGraph.TypeAlias assocScope
 
     slot <- lookupSlot (Declaration name)
     kindSlot <- lookupSlot (Declaration kindName)
diff --git a/src/Data/Syntax/Expression.hs b/src/Data/Syntax/Expression.hs
index bf4729752..9079ea9ca 100644
--- a/src/Data/Syntax/Expression.hs
+++ b/src/Data/Syntax/Expression.hs
@@ -427,6 +427,7 @@ instance Evaluatable MemberAccess where
     let lhsAccessControl = fromMaybe Public (termToAccessControl lhs)
     infos <- declarationsByAccessControl rhsScope lhsAccessControl
 
+    -- This means we always throw an 'AccessControlError' whenever we have a rhs term whose 'declaredName' is 'Nothing'.
     rhsName <- maybeM (throwNoNameError rhs) (declaredName rhs)
     rhsValue' <- case find (\Info{..} -> Declaration rhsName == infoDeclaration) infos of
       Just _  -> pure rhsValue
diff --git a/src/Data/Syntax/Statement.hs b/src/Data/Syntax/Statement.hs
index 9477058e2..6df0a3219 100644
--- a/src/Data/Syntax/Statement.hs
+++ b/src/Data/Syntax/Statement.hs
@@ -121,13 +121,13 @@ data Let a  = Let { letVariable :: !a, letValue :: !a, letBody :: !a }
 
 instance Evaluatable Let where
   eval eval _ Let{..} = do
-    name <- maybeM (throwNoNameError letVariable) (declaredName letVariable)
-    letSpan <- ask @Span
+    -- This use of 'throwNoNameError' is okay until we have a better way of mapping gensym names to terms in the scope graph.
     valueName <- maybeM (throwNoNameError letValue) (declaredName letValue)
     assocScope <- associatedScope (Declaration valueName)
 
     _ <- withLexicalScopeAndFrame $ do
-      declare (Declaration name) Default Public letSpan ScopeGraph.Let assocScope
+      letSpan <- ask @Span
+      name <- declareMaybeName (declaredName letVariable) Default Public letSpan ScopeGraph.Let assocScope
       letVal <- eval letValue
       slot <- lookupSlot (Declaration name)
       assign slot letVal
diff --git a/src/Language/Go/Syntax.hs b/src/Language/Go/Syntax.hs
index 781b905b0..be3ea3326 100644
--- a/src/Language/Go/Syntax.hs
+++ b/src/Language/Go/Syntax.hs
@@ -75,11 +75,10 @@ data QualifiedImport a = QualifiedImport { qualifiedImportFrom :: !ImportPath, q
 instance Evaluatable QualifiedImport where
   eval _ _ (QualifiedImport importPath aliasTerm) = do
     paths <- resolveGoImport importPath
-    alias <- maybeM (throwNoNameError aliasTerm) (declaredName aliasTerm)
     span <- ask @Span
     scopeAddress <- newScope mempty
-    declare (Declaration alias) Default Public span ScopeGraph.QualifiedImport (Just scopeAddress)
-    aliasSlot <- lookupSlot (Declaration alias)
+    name <- declareMaybeName (declaredName aliasTerm) Default Public span ScopeGraph.QualifiedImport (Just scopeAddress)
+    aliasSlot <- lookupSlot (Declaration name)
 
     withScope scopeAddress $ do
       let
diff --git a/src/Language/PHP/Syntax.hs b/src/Language/PHP/Syntax.hs
index 2054ce073..1229965a6 100644
--- a/src/Language/PHP/Syntax.hs
+++ b/src/Language/PHP/Syntax.hs
@@ -172,6 +172,7 @@ data QualifiedName a = QualifiedName { name :: a, identifier :: a }
 
 instance Evaluatable QualifiedName where
   eval _ _ (QualifiedName obj iden) = do
+    -- TODO: Consider gensym'ed names used for References.
     name <- maybeM (throwNoNameError obj) (declaredName obj)
     let objSpan = getSpan obj
     reference (Reference name) objSpan ScopeGraph.Identifier (Declaration name)
diff --git a/src/Language/Python/Syntax.hs b/src/Language/Python/Syntax.hs
index eaa055226..7af737e17 100644
--- a/src/Language/Python/Syntax.hs
+++ b/src/Language/Python/Syntax.hs
@@ -187,6 +187,7 @@ newtype QualifiedImport a = QualifiedImport { qualifiedImportFrom :: NonEmpty a
 -- import a.b.c
 instance Evaluatable QualifiedImport where
   eval _ _ (QualifiedImport qualifiedNames) = do
+    -- TODO: Consider gensym'ed names for imports.
     qualifiedName <- fmap (T.unpack . formatName) <$> traverse (\term -> maybeM (throwNoNameError term) (declaredName term)) qualifiedNames
     modulePaths <- resolvePythonModules (QualifiedName qualifiedName)
     let namesAndPaths = toList (NonEmpty.zip (NonEmpty.zip qualifiedNames (Data.Abstract.Evaluatable.name . T.pack <$> qualifiedName)) modulePaths)
diff --git a/src/Language/Ruby/Syntax.hs b/src/Language/Ruby/Syntax.hs
index f11fb9988..e08504529 100644
--- a/src/Language/Ruby/Syntax.hs
+++ b/src/Language/Ruby/Syntax.hs
@@ -181,7 +181,9 @@ instance Diffable Class where
 
 instance Evaluatable Class where
   eval eval _ Class{..} = do
-    name <- maybeM (throwNoNameError classIdentifier) (declaredName classIdentifier)
+    (name, relation) <- case declaredName classIdentifier of
+                          Just name -> pure (name, Default)
+                          _         -> gensym >>= \name -> pure (name, Gensym)
     span <- ask @Span
     currentScope' <- currentScope
 
@@ -210,7 +212,7 @@ instance Evaluatable Class where
             current = (Lexical, ) <$> pure (pure currentScope')
             edges = Map.fromList (superclassEdges <> current)
         classScope <- newScope edges
-        declare (Declaration name) Default Public span ScopeGraph.Class (Just classScope)
+        declare (Declaration name) relation Public span ScopeGraph.Class (Just classScope)
 
         let frameEdges = Map.singleton Superclass (Map.fromList (catMaybes superScopes))
         childFrame <- newFrame classScope frameEdges
@@ -241,7 +243,9 @@ data Module a = Module { moduleIdentifier :: !a, moduleStatements :: ![a] }
 
 instance Evaluatable Module where
   eval eval _ Module{..} =  do
-    name <- maybeM (throwNoNameError moduleIdentifier) (declaredName moduleIdentifier)
+    (name, relation) <- case declaredName moduleIdentifier of
+                          Just name -> pure (name, Default)
+                          _         -> gensym >>= \name -> pure (name, Gensym)
     span <- ask @Span
     currentScope' <- currentScope
 
@@ -260,7 +264,7 @@ instance Evaluatable Module where
       Nothing -> do
         let edges = Map.singleton Lexical [ currentScope' ]
         classScope <- newScope edges
-        declare (Declaration name) Default Public span ScopeGraph.Module (Just classScope)
+        declare (Declaration name) relation Public span ScopeGraph.Module (Just classScope)
 
         currentFrame' <- currentFrame
         let frameEdges = Map.singleton Lexical (Map.singleton currentScope' currentFrame')
@@ -323,10 +327,12 @@ instance Declarations1 Assignment where
 
 instance Evaluatable Assignment where
   eval eval ref Assignment{..} = do
-    lhsName <- maybeM (throwNoNameError assignmentTarget) (declaredName assignmentTarget)
+    (lhsName, relation) <- case declaredName assignmentTarget of
+                             Just name -> pure (name, Default)
+                             _         -> gensym >>= \name -> pure (name, Gensym)
     maybeSlot <- maybeLookupDeclaration (Declaration lhsName)
     assignmentSpan <- ask @Span
-    maybe (declare (Declaration lhsName) Default Public assignmentSpan ScopeGraph.Assignment Nothing) (const (pure ())) maybeSlot
+    maybe (declare (Declaration lhsName) relation Public assignmentSpan ScopeGraph.Assignment Nothing) (const (pure ())) maybeSlot
 
     lhs <- ref assignmentTarget
     rhs <- eval assignmentValue
diff --git a/src/Language/TypeScript/Syntax/Import.hs b/src/Language/TypeScript/Syntax/Import.hs
index ad07c520f..4ae7ce6a2 100644
--- a/src/Language/TypeScript/Syntax/Import.hs
+++ b/src/Language/TypeScript/Syntax/Import.hs
@@ -58,10 +58,8 @@ instance Evaluatable QualifiedAliasedImport where
     importScope <- newScope (Map.singleton ScopeGraph.Import [ moduleScope ])
     let scopeMap = Map.singleton moduleScope moduleFrame
     aliasFrame <- newFrame importScope (Map.singleton ScopeGraph.Import scopeMap)
-
-    alias <- maybeM (throwNoNameError aliasTerm) (declaredName aliasTerm)
-    declare (Declaration alias) Default Public span ScopeGraph.QualifiedAliasedImport (Just importScope)
-    aliasSlot <- lookupSlot (Declaration alias)
+    name <- declareMaybeName (declaredName aliasTerm) Default Public span ScopeGraph.QualifiedAliasedImport (Just importScope)
+    aliasSlot <- lookupSlot (Declaration name)
     assign aliasSlot =<< object aliasFrame
 
     unit
diff --git a/src/Language/TypeScript/Syntax/JSX.hs b/src/Language/TypeScript/Syntax/JSX.hs
index dd93c33f9..ceb6129b5 100644
--- a/src/Language/TypeScript/Syntax/JSX.hs
+++ b/src/Language/TypeScript/Syntax/JSX.hs
@@ -76,9 +76,8 @@ instance Declarations1 RequiredParameter where
 
 instance Evaluatable RequiredParameter where
   eval eval ref RequiredParameter{..} = do
-    name <- maybeM (throwNoNameError requiredParameterSubject) (declaredName requiredParameterSubject)
     span <- ask @Span
-    declare (Declaration name) Default Public span ScopeGraph.RequiredParameter Nothing
+    _ <- declareMaybeName (declaredName requiredParameterSubject) Default Public span ScopeGraph.RequiredParameter Nothing
 
     lhs <- ref requiredParameterSubject
     rhs <- eval requiredParameterValue
diff --git a/src/Language/TypeScript/Syntax/TypeScript.hs b/src/Language/TypeScript/Syntax/TypeScript.hs
index 272acbf4b..951beb39f 100644
--- a/src/Language/TypeScript/Syntax/TypeScript.hs
+++ b/src/Language/TypeScript/Syntax/TypeScript.hs
@@ -193,7 +193,9 @@ declareModule :: ( AbstractValue term address value m
                 -> [term]
                 -> Evaluator term address value m value
 declareModule eval identifier statements = do
-    name <- maybeM (throwNoNameError identifier) (declaredName identifier)
+    (name, relation) <- case declaredName identifier of
+                          Just name -> pure (name, Default)
+                          _         -> gensym >>= \name -> pure (name, Gensym)
     span <- ask @Span
     currentScope' <- currentScope
 
@@ -212,7 +214,7 @@ declareModule eval identifier statements = do
       Nothing -> do
         let edges = Map.singleton Lexical [ currentScope' ]
         childScope <- newScope edges
-        declare (Declaration name) Default Public span ScopeGraph.Module (Just childScope)
+        declare (Declaration name) relation Public span ScopeGraph.Module (Just childScope)
 
         currentFrame' <- currentFrame
         let frameEdges = Map.singleton Lexical (Map.singleton currentScope' currentFrame')
@@ -257,7 +259,6 @@ instance Declarations a => Declarations (AbstractClass a) where
 
 instance Evaluatable AbstractClass where
   eval eval _ AbstractClass{..} = do
-    name <- maybeM (throwNoNameError abstractClassIdentifier) (declaredName abstractClassIdentifier)
     span <- ask @Span
     currentScope' <- currentScope
 
@@ -274,7 +275,7 @@ instance Evaluatable AbstractClass where
         current = (Lexical, ) <$> pure (pure currentScope')
         edges = Map.fromList (superclassEdges <> current)
     classScope <- newScope edges
-    declare (Declaration name) Default Public span ScopeGraph.AbstractClass (Just classScope)
+    name <- declareMaybeName (declaredName abstractClassIdentifier) Default Public span ScopeGraph.AbstractClass (Just classScope)
 
     let frameEdges = Map.singleton Superclass (Map.fromList (catMaybes superScopes))
     childFrame <- newFrame classScope frameEdges
diff --git a/src/Semantic/Api/Symbols.hs b/src/Semantic/Api/Symbols.hs
index 2f4f43144..a514d9851 100644
--- a/src/Semantic/Api/Symbols.hs
+++ b/src/Semantic/Api/Symbols.hs
@@ -37,8 +37,12 @@ legacyParseSymbols blobs = Legacy.ParseTreeSymbolResponse <$> distributeFoldMap
     go blob@Blob{..} = (doParse blob >>= withSomeTerm (renderToSymbols blob)) `catchError` (\(SomeException _) -> pure (pure emptyFile))
       where emptyFile = Legacy.File (pack blobPath) (pack (show blobLanguage)) []
 
+    -- Legacy symbols output doesn't include Function Calls.
+    symbolsToSummarize :: [Text]
+    symbolsToSummarize = ["Function", "Method", "Class", "Module"]
+
     renderToSymbols :: (IsTaggable f, Applicative m) => Blob -> Term f Location -> m [Legacy.File]
-    renderToSymbols blob term = pure $ either mempty (pure . tagsToFile blob) (runTagging blob term)
+    renderToSymbols blob term = pure $ either mempty (pure . tagsToFile blob) (runTagging blob symbolsToSummarize term)
 
     tagsToFile :: Blob -> [Tag] -> Legacy.File
     tagsToFile Blob{..} tags = Legacy.File (pack blobPath) (pack (show blobLanguage)) (fmap tagToSymbol tags)
@@ -63,8 +67,11 @@ parseSymbols blobs = ParseTreeSymbolResponse . V.fromList . toList <$> distribut
       where
         errorFile e = File (pack blobPath) (bridging # blobLanguage) mempty (V.fromList [ParseError (T.pack e)])
 
+        symbolsToSummarize :: [Text]
+        symbolsToSummarize = ["Function", "Method", "Class", "Module", "Call", "Send"]
+
         renderToSymbols :: (IsTaggable f, Applicative m) => Blob -> Term f Location -> m File
-        renderToSymbols blob@Blob{..} term = pure $ either (errorFile . show) (tagsToFile blob) (runTagging blob term)
+        renderToSymbols blob@Blob{..} term = pure $ either (errorFile . show) (tagsToFile blob) (runTagging blob symbolsToSummarize term)
 
         tagsToFile :: Blob -> [Tag] -> File
         tagsToFile Blob{..} tags = File (pack blobPath) (bridging # blobLanguage) (V.fromList (fmap tagToSymbol tags)) mempty
diff --git a/src/Tags/Taggable.hs b/src/Tags/Taggable.hs
index e6ea213cb..5912194af 100644
--- a/src/Tags/Taggable.hs
+++ b/src/Tags/Taggable.hs
@@ -200,6 +200,15 @@ instance Taggable TypeScript.Module where
   snippet ann (TypeScript.Module _ _                   ) = Just $ locationByteRange ann
   symbolName = declaredName . TypeScript.moduleIdentifier
 
+instance Taggable Expression.Call where
+  snippet ann (Expression.Call _ _ _ (Term (In body _))) = Just $ subtractLocation ann body
+  symbolName = declaredName . Expression.callFunction
+
+instance Taggable Ruby.Send where
+  snippet ann (Ruby.Send _ _ _ (Just (Term (In body _)))) = Just $ subtractLocation ann body
+  snippet ann _                                           = Just $ locationByteRange ann
+  symbolName Ruby.Send{..} = maybe Nothing declaredName sendSelector
+
 instance Taggable []
 instance Taggable Comment.Comment
 instance Taggable Comment.HashBang
@@ -209,7 +218,6 @@ instance Taggable Expression.Await
 instance Taggable Expression.BAnd
 instance Taggable Expression.BOr
 instance Taggable Expression.BXOr
-instance Taggable Expression.Call
 instance Taggable Expression.Cast
 instance Taggable Expression.Comparison
 instance Taggable Expression.Complement
@@ -606,7 +614,6 @@ instance Taggable PHP.PropertyModifier
 instance Taggable PHP.InterfaceDeclaration
 instance Taggable PHP.Declare
 
-instance Taggable Ruby.Send
 instance Taggable Ruby.Require
 instance Taggable Ruby.Load
 instance Taggable Ruby.LowPrecedenceAnd
diff --git a/src/Tags/Tagging.hs b/src/Tags/Tagging.hs
index 2cc205d4b..1cd83ebd9 100644
--- a/src/Tags/Tagging.hs
+++ b/src/Tags/Tagging.hs
@@ -21,19 +21,17 @@ import           Data.Term
 import           Data.Text hiding (empty)
 import           Tags.Taggable
 
-symbolsToSummarize :: [Text]
-symbolsToSummarize = ["Function", "Method", "Class", "Module"]
-
 runTagging :: (IsTaggable syntax)
   => Blob
+  -> [Text]
   -> Term syntax Location
   -> Either TranslationError [Tag]
-runTagging blob tree
+runTagging blob symbolsToSummarize tree
   = Eff.run
   . Error.runError
   . State.evalState mempty
   . runT $ source (tagging blob tree)
-      ~> contextualizing blob
+      ~> contextualizing blob symbolsToSummarize
 
 type ContextToken = (Text, Maybe Range)
 
@@ -41,8 +39,8 @@ type Contextualizer
   = StateC [ContextToken]
   ( ErrorC TranslationError PureC)
 
-contextualizing :: Blob -> Machine.ProcessT Contextualizer Token Tag
-contextualizing Blob{..} = repeatedly $ await >>= \case
+contextualizing :: Blob -> [Text] -> Machine.ProcessT Contextualizer Token Tag
+contextualizing Blob{..} symbolsToSummarize = repeatedly $ await >>= \case
   Enter x r -> enterScope (x, r)
   Exit  x r -> exitScope (x, r)
   Iden iden span docsLiteralRange -> lift State.get >>= \case
diff --git a/test/Tags/Spec.hs b/test/Tags/Spec.hs
index 34d9aeba0..04cbb3001 100644
--- a/test/Tags/Spec.hs
+++ b/test/Tags/Spec.hs
@@ -1,7 +1,8 @@
 module Tags.Spec (spec) where
 
-import Tags.Tagging
+import Data.Text (Text)
 import SpecHelpers
+import Tags.Tagging
 
 
 spec :: Spec
@@ -9,35 +10,40 @@ spec = parallel $ do
   describe "go" $ do
     it "produces tags for functions with docs" $ do
       (blob, tree) <- parseTestFile goParser "test/fixtures/go/tags/simple_functions.go"
-      runTagging blob tree `shouldBe` Right
-        [ Tag "TestFromBits" "Function" (Span (Pos 6 1) (Pos 7 2)) ["Statements"] (Just "func TestFromBits(t *testing.T)") (Just "// TestFromBits ...")
-        , Tag "Hi" "Function" (Span (Pos 9 1) (Pos 10 2)) ["Statements"] (Just "func Hi()") Nothing ]
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
+        [ Tag "TestFromBits" "Function" (Span (Pos 6 1) (Pos 8 2)) ["Statements"] (Just "func TestFromBits(t *testing.T) {") (Just "// TestFromBits ...")
+        , Tag "Hi" "Function" (Span (Pos 10 1) (Pos 11 2)) ["Statements"] (Just "func Hi()") Nothing ]
 
     it "produces tags for methods" $ do
       (blob, tree) <- parseTestFile goParser "test/fixtures/go/tags/method.go"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "CheckAuth" "Method" (Span (Pos 3 1) (Pos 3 100)) ["Statements"] (Just "func (c *apiClient) CheckAuth(req *http.Request, user, repo string) (*authenticatedActor, error)") Nothing]
 
+    it "produces tags for calls" $ do
+      (blob, tree) <- parseTestFile goParser "test/fixtures/go/tags/simple_functions.go"
+      runTagging blob ["Call"] tree `shouldBe` Right
+        [ Tag "Hi" "Call" (Span (Pos 7 2) (Pos 7 6)) ["Function", "Context", "Statements"] (Just "Hi()") Nothing]
+
   describe "javascript and typescript" $ do
     it "produces tags for functions with docs" $ do
       (blob, tree) <- parseTestFile typescriptParser "test/fixtures/javascript/tags/simple_function_with_docs.js"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "myFunction" "Function" (Span (Pos 2 1) (Pos 4 2)) ["Statements"] (Just "function myFunction()") (Just "// This is myFunction") ]
 
     it "produces tags for classes" $ do
       (blob, tree) <- parseTestFile typescriptParser "test/fixtures/typescript/tags/class.ts"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "FooBar" "Class" (Span (Pos 1 1) (Pos 1 16)) ["Statements"] (Just "class FooBar") Nothing ]
 
     it "produces tags for modules" $ do
       (blob, tree) <- parseTestFile typescriptParser "test/fixtures/typescript/tags/module.ts"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "APromise" "Module" (Span (Pos 1 1) (Pos 1 20)) ["Statements"] (Just "module APromise { }") Nothing ]
 
   describe "python" $ do
     it "produces tags for functions" $ do
       (blob, tree) <- parseTestFile pythonParser "test/fixtures/python/tags/simple_functions.py"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "Foo" "Function" (Span (Pos 1 1) (Pos 5 17)) ["Statements"] (Just "def Foo(x)") Nothing
         , Tag "Bar" "Function" (Span (Pos 7 1) (Pos 11 13)) ["Statements"] (Just "def Bar()") Nothing
         , Tag "local" "Function" (Span (Pos 8 5) (Pos 9 17)) ["Statements", "Function", "Statements"] (Just "def local()") Nothing
@@ -45,35 +51,43 @@ spec = parallel $ do
 
     it "produces tags for functions with docs" $ do
       (blob, tree) <- parseTestFile pythonParser "test/fixtures/python/tags/simple_function_with_docs.py"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "Foo" "Function" (Span (Pos 1 1) (Pos 3 13)) ["Statements"] (Just "def Foo(x)") (Just "\"\"\"This is the foo function\"\"\"") ]
 
     it "produces tags for classes" $ do
       (blob, tree) <- parseTestFile pythonParser "test/fixtures/python/tags/class.py"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "Foo" "Class" (Span (Pos 1 1) (Pos 5 17)) ["Statements"] (Just "class Foo") (Just "\"\"\"The Foo class\"\"\"")
         , Tag "f" "Function" (Span (Pos 3 5) (Pos 5 17)) ["Statements", "Class", "Statements"] (Just "def f(self)") (Just "\"\"\"The f method\"\"\"")
         ]
 
     it "produces tags for multi-line functions" $ do
       (blob, tree) <- parseTestFile pythonParser "test/fixtures/python/tags/multiline.py"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "Foo" "Function" (Span (Pos 1 1) (Pos 3 13)) ["Statements"] (Just "def Foo(x,") Nothing ]
 
   describe "ruby" $ do
     it "produces tags for methods" $ do
       (blob, tree) <- parseTestFile rubyParser "test/fixtures/ruby/tags/simple_method.rb"
-      runTagging blob tree `shouldBe` Right
-        [ Tag "foo" "Method" (Span (Pos 1 1) (Pos 2 4)) ["Statements"] (Just "def foo") Nothing ]
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
+        [ Tag "foo" "Method" (Span (Pos 1 1) (Pos 4 4)) ["Statements"] (Just "def foo") Nothing ]
+
+    it "produces tags for sends" $ do
+      (blob, tree) <- parseTestFile rubyParser "test/fixtures/ruby/tags/simple_method.rb"
+      runTagging blob ["Send"] tree `shouldBe` Right
+        [ Tag "puts" "Send" (Span (Pos 2 3) (Pos 2 12)) ["Statements", "Method", "Statements"] (Just "puts \"hi\"") Nothing
+        , Tag "bar" "Send" (Span (Pos 3 3) (Pos 3 8)) ["Statements", "Method", "Statements"] (Just "a.bar") Nothing
+        , Tag "a" "Send" (Span (Pos 3 3) (Pos 3 4)) ["Send", "Statements", "Method", "Statements"] (Just "a") Nothing
+        ]
 
     it "produces tags for methods with docs" $ do
       (blob, tree) <- parseTestFile rubyParser "test/fixtures/ruby/tags/simple_method_with_docs.rb"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "foo" "Method" (Span (Pos 2 1) (Pos 3 4)) ["Statements"] (Just "def foo") (Just "# Public: foo") ]
 
     it "produces tags for methods and classes with docs" $ do
       (blob, tree) <- parseTestFile rubyParser "test/fixtures/ruby/tags/class_module.rb"
-      runTagging blob tree `shouldBe` Right
+      runTagging blob symbolsToSummarize tree `shouldBe` Right
         [ Tag "Foo" "Module" (Span (Pos 2 1 ) (Pos 12 4)) ["Statements"] (Just "module Foo") (Just "# Public: Foo")
         , Tag "Bar" "Class"  (Span (Pos 5 3 ) (Pos 11 6)) ["Module", "Context", "Statements"] (Just "class Bar") (Just "# Public: Bar")
         , Tag "baz" "Method" (Span (Pos 8 5 ) (Pos 10 8)) ["Class", "Context", "Module", "Context", "Statements"] (Just "def baz(a)") (Just "# Public: baz")
@@ -81,3 +95,6 @@ spec = parallel $ do
         , Tag "foo" "Method" (Span (Pos 15 3) (Pos 17 6)) ["Statements", "Class", "Statements"] (Just "def foo") Nothing
         , Tag "foo" "Method" (Span (Pos 18 3) (Pos 19 6)) ["Statements", "Class", "Statements"] (Just "def self.foo") Nothing
         ]
+
+symbolsToSummarize :: [Text]
+symbolsToSummarize = ["Function", "Method", "Class", "Module"]
diff --git a/test/fixtures/go/tags/simple_functions.go b/test/fixtures/go/tags/simple_functions.go
index a9595e745..3b411672d 100644
--- a/test/fixtures/go/tags/simple_functions.go
+++ b/test/fixtures/go/tags/simple_functions.go
@@ -4,6 +4,7 @@ import "testing"
 
 // TestFromBits ...
 func TestFromBits(t *testing.T) {
+	Hi()
 }
 
 func Hi() {
diff --git a/test/fixtures/ruby/tags/simple_method.rb b/test/fixtures/ruby/tags/simple_method.rb
index ff7bbbe94..b3d1487af 100644
--- a/test/fixtures/ruby/tags/simple_method.rb
+++ b/test/fixtures/ruby/tags/simple_method.rb
@@ -1,2 +1,4 @@
 def foo
+  puts "hi"
+  a.bar
 end