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[3.13][3.15] gh-143008: Fix race re-initializing TextIOWrapper (#151203) #151227

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vstinner merged 1 commit into from
Jun 10, 2026
+6 −2
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[3.13][3.15] gh-143008: Fix race re-initializing TextIOWrapper (#151203) #151227

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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2026-06-04-18-22-56.gh-issue-143008.z5tw-J.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fix race conditions when re-initializing a :class:`io.TextIOWrapper` object.
4 changes: 3 additions & 1 deletion Modules/_io/clinic/textio.c.h
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3 changes: 2 additions & 1 deletion Modules/_io/textio.c
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Expand Up @@ -1049,6 +1049,7 @@ io_check_errors(PyObject *errors)


/*[clinic input]
@critical_section
_io.TextIOWrapper.__init__
buffer: object
encoding: str(accept={str, NoneType}) = None
Expand Down Expand Up @@ -1092,7 +1093,7 @@ _io_TextIOWrapper___init___impl(textio *self, PyObject *buffer,
const char *encoding, PyObject *errors,
const char *newline, int line_buffering,
int write_through)
/*[clinic end generated code: output=72267c0c01032ed2 input=e6cfaaaf6059d4f5]*/
/*[clinic end generated code: output=72267c0c01032ed2 input=0f077220214c40a4]*/
{
PyObject *raw, *codec_info = NULL;
PyObject *res;
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