Added a test related to #449

tests/test_exception/good/double_definition.catala_en

@@ -0,0 +1,32 @@
+## Foo
+
+```catala
+declaration scope Foo:
+  output x content integer
+
+scope Foo:
+  definition x equals 1
+  definition x equals 1
+
+```
+
+```catala-test-inline
+$ catala Scopelang -s Foo
+let scope Foo (x: integer|internal|output) =
+  let x : integer = ⟨⟨true ⊢ 1⟩, ⟨true ⊢ 1⟩ | false ⊢ ∅ ⟩
+```
+
+In Scopelang we have what looks like conflicting exceptions. But after
+discussions related in https://github.com/CatalaLang/catala/issues/208, we
+have decided to relax this behavior when translating to Dcalc because the
+consequences of the conflicting exceptions are the same. Hence the
+Dcalc translation below.
+
+```catala-test-inline
+$ catala Dcalc -s Foo
+let Foo =
+  λ (Foo_in: Foo_in {}) →
+    let x : integer = error_empty
+      ⟨⟨⟨true ⊢ 1⟩ | true ⊢ 1⟩ | false ⊢ ∅ ⟩ in
+    Foo { "x"= x }
+```