diff --git a/scripts/prose_lint.py b/scripts/prose_lint.py
index 97b26121..31867bb7 100644
--- a/scripts/prose_lint.py
+++ b/scripts/prose_lint.py
@@ -383,11 +383,19 @@ def extracted_comments(path: Path, lines: list[str]) -> list[tuple[int, str, boo
             closing = '' if end >= 0 else closing
             continue
         masked = strip_strings(line, spec['quotes'])
+        # A line comment runs to end of line, so a block opener after one is text.
+        # Left unbounded it opens a block that swallows the code lines below.
+        # A documentation comment bounds it too, being exempt from linting rather than from here.
+        line_at = len(line)
+        for marker in spec['line']:
+            at = masked.find(marker)
+            if 0 <= at < line_at:
+                line_at = at
         cut = len(line)
         leading = True
         for opener, closer in spec['block']:
             at = masked.find(opener)
-            if 0 <= at < cut:
+            if 0 <= at < min(cut, line_at):
                 if any(line[at:].startswith(d) for d in spec['doc']):
                     continue
                 cut, leading = at, not line[:at].strip()
diff --git a/scripts/test_prose_lint.py b/scripts/test_prose_lint.py
index 46288291..0384ad9d 100644
--- a/scripts/test_prose_lint.py
+++ b/scripts/test_prose_lint.py
@@ -368,6 +368,18 @@ def test_a_comment_inside_a_fenced_block_is_skipped(self) -> None:
         self.assertEqual(['comment-wrap'],
                          self.flag('a.md', 'Prose.\n\n<!-- One thing. Another thing. -->\n'))
 
+    def test_a_block_opener_inside_a_line_comment_is_text(self) -> None:
+        """Read as a real opener it opens a block, and the code lines below are linted as prose.
+
+        The documentation form is the same case: exempting it from linting must not leave the
+        ceiling unbounded, or the syntax whose doc marker is a line comment reopens the defect.
+        """
+        for name, text in (('a.cs', '// Match a /* opener here\nvar x = 1; // Two things. Here.\n'),
+                           ('a.cs', '/// See a /* opener here\nvar x = 1; // Two things. Here.\n'),
+                           ('a.ps1', '# Match a <# opener here\n$x = 1 # Two things. Here.\n')):
+            with self.subTest(file=name, line=text.split('\n')[0]):
+                self.assertEqual(['comment-wrap'], self.flag(name, text))
+
     def test_css_has_block_comments_only(self) -> None:
         """A `//` in CSS is the scheme separator of a URL, not a comment marker."""
         self.assertEqual([], self.flag('a.css', 'a { background: url(http://x/y. Z); }\n'))