Issue #18408: Fix show_warning(), clear also the exception raised by

_Py_DisplaySourceLine()

For example, _PyGC_DumpShutdownStats() calls PyErr_WarnExplicitFormat() while
the import machinery does not work anymore, _Py_DisplaySourceLine() fails when
trying to import the io module.

1 files changed, 3 insertions, 3 deletions

diff --git a/Python/_warnings.c b/Python/_warnings.c
index 03e0c4545a..f93ede2e2f 100644
--- a/Python/_warnings.c
+++ b/Python/_warnings.c
@@ -283,9 +283,9 @@ show_warning(PyObject *filename, int lineno, PyObject *text, PyObject
         PyFile_WriteString(source_line_str, f_stderr);
         PyFile_WriteString("\n", f_stderr);
     }
-    else
-        if (_Py_DisplaySourceLine(f_stderr, filename, lineno, 2) < 0)
-                return;
+    else {
+        _Py_DisplaySourceLine(f_stderr, filename, lineno, 2);
+    }
     PyErr_Clear();
 }