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vstinner opened this issue May 1, 2025 · 0 comments
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GCC 15 warnings: destination lacks 'nonstring' attribute #133256

vstinner opened this issue May 1, 2025 · 0 comments

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@vstinner
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vstinner commented May 1, 2025 •
edited by bedevere-app bot
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Building Python 3.14 (main branch) with GCC 15 (on Fedora 42) emits the following compiler warnings:

In file included from ./Include/internal/pycore_runtime_structs.h:68,
                 from ./Include/internal/pycore_runtime.h:11,
                 from ./Include/internal/pycore_object.h:15,
                 from ./Include/internal/pycore_dict.h:11,
                 from Python/pylifecycle.c:9:
./Include/internal/pycore_debug_offsets.h:12:26: warning: initializer-string for array of 'char' truncates NUL terminator but destination lacks 'nonstring' attribute (9 chars into 8 available) [-Wunterminated-string-initialization]
   12 | #define _Py_Debug_Cookie "xdebugpy"
      |                          ^~~~~~~~~~
./Include/internal/pycore_debug_offsets.h:225:15: note: in definition of macro '_Py_DebugOffsets_INIT'
  225 |     .cookie = debug_cookie, \
      |               ^~~~~~~~~~~~
Python/pylifecycle.c:114:3: note: in expansion of macro '_PyRuntimeState_INIT'
  114 | = _PyRuntimeState_INIT(_PyRuntime, _Py_Debug_Cookie);
      |   ^~~~~~~~~~~~~~~~~~~~
Python/pylifecycle.c:114:36: note: in expansion of macro '_Py_Debug_Cookie'
  114 | = _PyRuntimeState_INIT(_PyRuntime, _Py_Debug_Cookie);
      |                                    ^~~~~~~~~~~~~~~~


./Modules/fcntlmodule.c:27:36: warning: initializer-string for array of 'char' truncates NUL terminator but destination lacks 'nonstring' attribute (9 chars into 8 available) [-Wunterminated-string-initialization]
   27 | static const char guard[GUARDSZ] = "\x00\xfa\x69\xc4\x67\xa3\x6c\x58";
      |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Linked PRs
vstinner added a commit to vstinner/cpython that referenced this issue May 1, 2025
@vstinner
pythongh-133256: Add _Py_NONSTRING macro
d382844 
Fix GCC 15 compiler warnings such as:

    Modules/fcntlmodule.c:27:36: warning: initializer-string for
    array of 'char' truncates NUL terminator but destination lacks
    'nonstring' attribute (9 chars into 8 available)
    [-Wunterminated-string-initialization]
    static const char guard[GUARDSZ] = "\x00\xfa\x69\xc4\x67\xa3\x6c\x58";
vstinner added a commit to vstinner/cpython that referenced this issue May 1, 2025
@vstinner
pythongh-133256: Add _Py_NONSTRING macro
abf1717 
Fix GCC 15 compiler warnings such as:

    Modules/fcntlmodule.c:27:36: warning: initializer-string for
    array of 'char' truncates NUL terminator but destination lacks
    'nonstring' attribute (9 chars into 8 available)
    [-Wunterminated-string-initialization]
    static const char guard[GUARDSZ] = "\x00\xfa\x69\xc4\x67\xa3\x6c\x58";
@bedevere-app bedevere-app bot mentioned this issue May 1, 2025
Merged
@vstinner vstinner mentioned this issue May 1, 2025
Closed
vstinner added a commit that referenced this issue May 1, 2025
@vstinner
gh-133256: Add _Py_NONSTRING macro (#133257)
e26bafd 
Fix GCC 15 compiler warnings such as:

    Modules/fcntlmodule.c:27:36: warning: initializer-string for
    array of 'char' truncates NUL terminator but destination lacks
    'nonstring' attribute (9 chars into 8 available)
    [-Wunterminated-string-initialization]
    static const char guard[GUARDSZ] = "\x00\xfa\x69\xc4\x67\xa3\x6c\x58";
@vstinner vstinner closed this as completed May 1, 2025
vstinner added a commit to vstinner/cpython that referenced this issue Jun 4, 2025
@vstinner
pythongh-133256: Add _Py_NONSTRING macro (python#133257)
f3742be 
Fix GCC 15 compiler warnings such as:

    In file included from Python/pylifecycle.c:26:
    Include/internal/pycore_runtime.h:47:26: warning:
    initializer-string for array of 'char' truncates NUL terminator
    but destination lacks 'nonstring' attribute (9 chars into 8
    available) [-Wunterminated-string-initialization]
       47 | #define _Py_Debug_Cookie "xdebugpy"
          |                          ^~~~~~~~~~

(cherry picked from commit e26bafd)
@bedevere-app bedevere-app bot mentioned this issue Jun 4, 2025
Merged
vstinner added a commit that referenced this issue Jun 4, 2025
@vstinner
[3.13] gh-133256: Add _Py_NONSTRING macro (#133257) (#135135)
659631f 
gh-133256: Add _Py_NONSTRING macro (#133257)

Fix GCC 15 compiler warnings such as:

    In file included from Python/pylifecycle.c:26:
    Include/internal/pycore_runtime.h:47:26: warning:
    initializer-string for array of 'char' truncates NUL terminator
    but destination lacks 'nonstring' attribute (9 chars into 8
    available) [-Wunterminated-string-initialization]
       47 | #define _Py_Debug_Cookie "xdebugpy"
          |                          ^~~~~~~~~~

(cherry picked from commit e26bafd)
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