https://github.com/python/cpython/commit/9c239fb50a7f2821359ed3dc82993fba7da7d41c
commit: 9c239fb50a7f2821359ed3dc82993fba7da7d41c
branch: main
author: Jelle Zijlstra <[email protected]>
committer: JelleZijlstra <[email protected]>
date: 2026-10-19T19:31:16-07:00
summary:
gh-159739: Preserve the syntax error if metadata allocation fails (#159751)
Restore the original exception when optional syntax-error metadata
cannot be allocated.
files:
A
Misc/NEWS.d/next/Core_and_Builtins/2026-10-19-19-33-35.gh-issue-159739.1fc3af.rst
M Parser/pegen.c
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2026-10-19-19-33-35.gh-issue-159739.1fc3af.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2026-10-19-19-33-35.gh-issue-159739.1fc3af.rst
new file mode 100644
index 000000000000000..a02631f2da2f9b2
--- /dev/null
+++
b/Misc/NEWS.d/next/Core_and_Builtins/2026-10-19-19-33-35.gh-issue-159739.1fc3af.rst
@@ -0,0 +1,2 @@
+Preserve the original :exc:`SyntaxError` if allocating optional error metadata
+fails.
diff --git a/Parser/pegen.c b/Parser/pegen.c
index bb14a1e78c5ad35..9643426fa74c885 100644
--- a/Parser/pegen.c
+++ b/Parser/pegen.c
@@ -1083,6 +1083,7 @@ _PyPegen_set_syntax_error_metadata(Parser *p) {
);
if (!metadata) {
PyErr_Clear();
+ PyErr_SetRaisedException(exc);
return;
}
PySyntaxErrorObject *syntax_error = (PySyntaxErrorObject *)exc;
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