Fix a magical comment caused internal error (#3740)

[etc/vim.git] / src / black / linegen.py

diff --git a/src/black/linegen.py b/src/black/linegen.py
index ad21307c311b83b0e0eb964b34ae6149cfcb0cee..5ef3bbd170578159249eb9f850676767a9bc1f56 100644 (file)
--- a/src/black/linegen.py
+++ b/src/black/linegen.py
@@ -49,6 +49,7 @@ from black.nodes import (
     is_stub_body,
     is_stub_suite,
     is_tuple_containing_walrus,
+    is_type_ignore_comment_string,
     is_vararg,
     is_walrus_assignment,
     is_yield,
@@ -1399,8 +1400,13 @@ def maybe_make_parens_invisible_in_atom(
     if is_lpar_token(first) and is_rpar_token(last):
         middle = node.children[1]
         # make parentheses invisible
-        first.value = ""
-        last.value = ""
+        if (
+            # If the prefix of `middle` includes a type comment with
+            # ignore annotation, then we do not remove the parentheses
+            not is_type_ignore_comment_string(middle.prefix.strip())
+        ):
+            first.value = ""
+            last.value = ""
         maybe_make_parens_invisible_in_atom(
             middle,
             parent=parent,