Fix dict typing

trans/transpiler/phases/typing/expr.py

@@ -147,10 +147,10 @@ class ScoperExprVisitor(ScoperVisitor):
             raise IncompatibleTypesError(f"{e} in `{ast.unparse(node)}`")
 
     def visit_Attribute(self, node: ast.Attribute) -> BaseType:
-        ltype = self.visit(node.value)
         try:
+            ltype = self.visit(node.value)
             return self.visit_getattr(ltype, node.attr)
-        except IncompatibleTypesError as e:
+        except Exception as e:
             raise IncompatibleTypesError(f"{e} in `{ast.unparse(node)}`")
 
     def visit_getattr(self, ltype: BaseType, name: str):
@@ -191,11 +191,11 @@ class ScoperExprVisitor(ScoperVisitor):
 
     def visit_Dict(self, node: ast.Dict) -> BaseType:
         if not node.keys:
-            return PyDict(TypeVariable())
+            return PyDict(TypeVariable(), TypeVariable())
         keys = [self.visit(e) for e in node.keys]
         values = [self.visit(e) for e in node.values]
         if len(set(keys)) != 1 or len(set(values)) != 1:
-            raise NotImplementedError("Dict with different types not handled yet")
+            raise NotImplementedError(f"Dict with different types not handled yet in `{ast.unparse(node)}`")
         return PyDict(keys[0], values[0])
 
     def visit_Subscript(self, node: ast.Subscript) -> BaseType: