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gh-87092: avoid gcc warning on uninitialized struct field in assemble.c#104460

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corona10
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@corona10corona10 commentedMay 14, 2023•
edited by bedevere-bot
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I noticed the warn while I built CPython with GCC8 + PGO + LTO.

gcc -pthread -c -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O3 -Wall    -fno-semantic-interposition -flto -fuse-linker-plugin -ffat-lto-objects -flto-partition=none -g -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Werror=implicit-function-declaration -fvisibility=hidden -fprofile-use -fprofile-correction -I./Include/internal  -I. -I./Include    -DPy_BUILD_CORE -o Python/bltinmodule.o Python/bltinmodule.cPython/assemble.c: In function ‘_PyAssemble_MakeCodeObject’:Python/assemble.c:131:8: warning: ‘handler.h_preserve_lasti’ may be used uninitialized in this function [-Wmaybe-uninitialized]     if (handler->h_preserve_lasti) {        ^Python/assemble.c:147:34: note: ‘handler.h_preserve_lasti’ was declared here     _PyCompile_ExceptHandlerInfo handler;                                  ^~~~~~~Python/assemble.c:132:15: warning: ‘handler.h_startdepth’ may be used uninitialized in this function [-Wmaybe-uninitialized]         depth -= 1;         ~~~~~~^~~~Python/assemble.c:147:34: note: ‘handler.h_startdepth’ was declared here     _PyCompile_ExceptHandlerInfo handler;                                  ^~~~~~~

@corona10corona10 changed the titleno-issue: Remove gcc compiler warn formay be used uninitializedno-issue: Remove gcc compiler warn for assemble.cMay 14, 2023
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Tests / Hypothesis Tests on Ubuntu (pull_request)

Unrelated to this PR:#22863 (comment)

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Thanks

corona10 reacted with heart emoji
@iritkatrieliritkatriel changed the titleno-issue: Remove gcc compiler warn for assemble.cgh-87092: avoid gcc warning on uninitialized struct field in assemble.cMay 14, 2023
@iritkatrieliritkatriel merged commit178153c intopython:mainMay 14, 2023
@corona10corona10 deleted the no-issue-remove-compiler-warn branchMay 14, 2023 11:32
carljm added a commit to carljm/cpython that referenced this pull requestMay 15, 2023
* main: (29 commits)pythongh-101819: Fix _io clinic input for unused base class method stubs (python#104418)pythongh-101819: Isolate `_io` (python#101948)  Bump mypy from 1.2.0 to 1.3.0 in /Tools/clinic (python#104501)pythongh-104494: Update certain Tkinter pack/place tests for Tk 8.7 errors (python#104495)pythongh-104050: Run mypy on `clinic.py` in CI (python#104421)pythongh-104490: Consistently define phony make targets (python#104491)pythongh-67056: document that registering/unregistering an atexit func from within an atexit func is undefined (python#104473)pythongh-104487: PYTHON_FOR_REGEN must be minimum Python 3.10 (python#104488)pythongh-101282: move BOLT config after PGO (pythongh-104493)pythongh-104469 Convert _testcapi/float.c to use AC (pythongh-104470)pythongh-104456: Fix ref leak in _ctypes.COMError (python#104457)pythongh-98539: Make _SSLTransportProtocol.abort() safe to call when closed (python#104474)pythongh-104337: Clarify random.gammavariate doc entry  (python#104410)  Minor improvements to typing docs (python#104465)pythongh-87092: avoid gcc warning on uninitialized struct field in assemble.c (python#104460)pythonGH-71383: IDLE - Document testing subsets of modules (python#104463)pythongh-104454: Fix refleak in AttributeError_reduce (python#104455)pythongh-75710: IDLE - add docstrings and comments to editor module (python#104446)pythongh-91896: Revert some very noisy DeprecationWarnings for `ByteString` (python#104424)  Add a mention of PYTHONBREAKPOINT to breakpoint() docs (python#104430)  ...
carljm added a commit to carljm/cpython that referenced this pull requestMay 15, 2023
* main: (204 commits)pythongh-101819: Fix _io clinic input for unused base class method stubs (python#104418)pythongh-101819: Isolate `_io` (python#101948)  Bump mypy from 1.2.0 to 1.3.0 in /Tools/clinic (python#104501)pythongh-104494: Update certain Tkinter pack/place tests for Tk 8.7 errors (python#104495)pythongh-104050: Run mypy on `clinic.py` in CI (python#104421)pythongh-104490: Consistently define phony make targets (python#104491)pythongh-67056: document that registering/unregistering an atexit func from within an atexit func is undefined (python#104473)pythongh-104487: PYTHON_FOR_REGEN must be minimum Python 3.10 (python#104488)pythongh-101282: move BOLT config after PGO (pythongh-104493)pythongh-104469 Convert _testcapi/float.c to use AC (pythongh-104470)pythongh-104456: Fix ref leak in _ctypes.COMError (python#104457)pythongh-98539: Make _SSLTransportProtocol.abort() safe to call when closed (python#104474)pythongh-104337: Clarify random.gammavariate doc entry  (python#104410)  Minor improvements to typing docs (python#104465)pythongh-87092: avoid gcc warning on uninitialized struct field in assemble.c (python#104460)pythonGH-71383: IDLE - Document testing subsets of modules (python#104463)pythongh-104454: Fix refleak in AttributeError_reduce (python#104455)pythongh-75710: IDLE - add docstrings and comments to editor module (python#104446)pythongh-91896: Revert some very noisy DeprecationWarnings for `ByteString` (python#104424)  Add a mention of PYTHONBREAKPOINT to breakpoint() docs (python#104430)  ...
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@iritkatrieliritkatrieliritkatriel approved these changes

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