Fail when a data-dependency fails to compile (#4219)

* Fail when a data-dependency fails to compile

Previously, we emitted errors but just kept on going which sometimes
kinda works but is certainly not the right thing to do.

Now we just crash and abort compilation.

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* why is windows

* undo crap

compiler/damlc/lib/DA/Cli/Damlc/Packaging.hs

@@ -14,6 +14,7 @@ module DA.Cli.Damlc.Packaging
 
 import qualified "zip" Codec.Archive.Zip as Zip
 import qualified "zip-archive" Codec.Archive.Zip as ZipArchive
+import Control.Exception.Extra
 import Control.Lens (toListOf)
 import Control.Monad.Extra
 import Control.Monad.IO.Class
@@ -230,13 +231,15 @@ generateAndInstallIfaceFiles dalf src opts workDir dbPath projectPackageDatabase
                   ]
             }
 
-    _ <- withDamlIdeState opts' loggerH diagnosticsLogger $ \ide ->
+    res <- withDamlIdeState opts' loggerH diagnosticsLogger $ \ide ->
         runAction ide $
         -- Setting ifDir to . means that the interface files will end up directly next to
         -- the source files which is what we want here.
         writeIfacesAndHie
             (toNormalizedFilePath ".")
             [fp | (fp, _content) <- src']
+    when (isNothing res) $
+      errorIO $ "Failed to compile interface for data-dependency: " <> unitIdStr
     -- write the conf file and refresh the package cache
     (cfPath, cfBs) <-
             mkConfFile