Let any unescaped # character terminate a comment

wyattscarpenter · web-flow · commit 376c81e1b38d · 2026-02-23T19:11:16.000-05:00
diff --git a/mypy/test/data.py b/mypy/test/data.py
@@ -547,7 +547,7 @@ def expand_errors(input: list[str], output: list[str], fnam: str) -> None:
         # The first in the split things isn't a comment
         for possible_err_comment in re.split(r"(?!\\)#\s*(?=[ENW]\s*:)", input[i])[1:]:
             m = re.search(
-                r"^([ENW])\s*:((?P<col>\d+):)?(?P<message>.*)$", possible_err_comment.strip()
+                r"^([ENW])\s*:((?P<col>\d+):)?(?P<message>(?:\\#|[^#])*)$", possible_err_comment.strip()
             )
             if m:
                 if m.group(1) == "E":

Original file line number	Diff line number	Diff line change
`@@ -547,7 +547,7 @@ def expand_errors(input: list[str], output: list[str], fnam: str) -> None:`
`547`	`547`	`# The first in the split things isn't a comment`
`548`	`548`	`for possible_err_comment in re.split(r"(?!\\)#\s(?=[ENW]\s:)", input[i])[1:]:`
`549`	`549`	`m = re.search(`
`550`		`- r"^([ENW])\s:((?P<col>\d+):)?(?P<message>.)$", possible_err_comment.strip()`
	`550`	`+ r"^([ENW])\s:((?P<col>\d+):)?(?P<message>(?:\\#\|[^#]))$", possible_err_comment.strip()`
`551`	`551`	`)`
`552`	`552`	`if m:`
`553`	`553`	`if m.group(1) == "E":`