🐛 FIX: Correct included source line attribution

myst_parser/mocking.py

@@ -515,7 +515,7 @@ def run(self) -> list[nodes.Element]:
                 )
             self.renderer.nested_render_text(
                 file_content,
-                startline + 1,
+                startline,
                 heading_offset=self.options.get("heading-offset", 0),
             )
         finally:

tests/test_renderers/fixtures/mock_include_errors.md

@@ -19,5 +19,22 @@ Error in include file:
 ```{include} bad.md
 ```
 .
-tmpdir/bad.md:2: (WARNING/2) Unknown interpreted text role "a". [myst.role_unknown]
+tmpdir/bad.md:1: (WARNING/2) Unknown interpreted text role "a". [myst.role_unknown]
+.
+
+Error in include file with start line:
+.
+```{include} bad_start.md
+:start-line: 1
+```
+.
+tmpdir/bad_start.md:2: (WARNING/2) Unknown interpreted text role "a". [myst.role_unknown]
+.
+
+Error in nested include file:
+.
+```{include} outer.md
+```
+.
+tmpdir/bad.md:1: (WARNING/2) Unknown interpreted text role "a". [myst.role_unknown]
 .

tests/test_renderers/test_include_directive.py

@@ -41,6 +41,8 @@ def test_errors(file_params, tmp_path, monkeypatch):
     monkeypatch.chdir(tmp_path)
 
     tmp_path.joinpath("bad.md").write_text("{a}`b`")
+    tmp_path.joinpath("bad_start.md").write_text("skip\n{a}`b`")
+    tmp_path.joinpath("outer.md").write_text("```{include} bad.md\n```")
 
     report_stream = StringIO()
     publish_doctree(