added fallback to list of possible overload variants

Author: KevinRK29

mypy/messages.py

@@ -1155,6 +1155,15 @@ def no_variant_matches_arguments(
                 if matches: 
                     msg += f"; did you mean {pretty_seq(matches, 'or')}?"
                 self.fail(msg, context, code=code)
+                
+                if matching_variant is None:
+                    self.note(
+                        f"Possible overload variant{plural_s(len(overload.items))}:",
+                        context,
+                        code=code,
+                    )
+                    for item in overload.items:
+                        self.note(pretty_callable(item, self.options), context, offset=4, code=code)
 
             return 
 

test-data/unit/check-expressions.test

@@ -2574,4 +2574,8 @@ def f(foobar: str) -> None: ...
 def f(foobar: Union[int, str]) -> None:
     pass
 
-f(fobar=1) # E: Unexpected keyword argument "fobar" for overloaded function "f" defined on line 4; did you mean "foobar"?
+f(fobar=1) # E: Unexpected keyword argument "fobar" for overloaded function "f" defined on line 4; did you mean "foobar"?
+f(random=[1,2,3]) # E: Unexpected keyword argument "random" for overloaded function "f" \
+                  # N: Possible overload variants: \
+                  # N:     def f(foobar: int) -> None \
+                  # N:     def f(foobar: str) -> None