Fix attribute after walrus error (#177)

Author: felix-hilden

docs/src/release_notes.rst

@@ -8,6 +8,11 @@ These release notes are based on
 sphinx-codeautolink adheres to
 `Semantic Versioning <https://semver.org>`_.
 
+Unreleased
+----------
+- Fix attribute and call after walrus leading parser error (:issue:`174`)
+- Improve error message on uncaught parsing errors (:issue:`177`)
+
 0.17.0 (2025-02-18)
 -------------------
 Added

src/sphinx_codeautolink/extension/block.py

@@ -196,7 +196,7 @@ def visit_literal_block(self, node: nodes.literal_block):
         """Visit a generic literal block."""
         return self.parse_source(node, node.get("language", self.highlight_lang))
 
-    def parse_source(  # noqa: C901
+    def parse_source(  # noqa: C901,PLR0912
         self, node: nodes.literal_block | nodes.doctest_block, language: str | None
     ) -> None:
         """Analyse Python code blocks."""
@@ -258,6 +258,12 @@ def parse_source(  # noqa: C901
             msg = self._parsing_error_msg(e, language, show_source)
             logger.warning(msg, type=warn_type, subtype="parse_block", location=node)
             return
+        except Exception as e:
+            show_source = self._format_source_for_error(
+                self.global_preface, self.concat_sources, prefaces, transform.source
+            )
+            msg = self._parsing_error_msg(e, language, show_source)
+            raise type(e)(msg) from e
 
         if prefaces or self.concat_sources or self.global_preface:
             concat_lens = [s.count("\n") + 1 for s in self.concat_sources]
@@ -302,6 +308,7 @@ def _parsing_error_msg(self, error: Exception, language: str, source: str) -> st
                 str(error) + f" in document {self.current_document!r}",
                 f"Parsed source in `{language}` block:",
                 source,
+                "",
             ]
         )