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* [Bug libc/27885] New: _Static_assert fallback definition in <sys/cdefs.h> triggers a lgtm.com alert
@ 2021-05-18 12:28 gjover at sipwise dot com
2023-07-03 1:53 ` [Bug libc/27885] " ppluzhnikov at google dot com
0 siblings, 1 reply; 2+ messages in thread
From: gjover at sipwise dot com @ 2021-05-18 12:28 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27885
Bug ID: 27885
Summary: _Static_assert fallback definition in <sys/cdefs.h>
triggers a lgtm.com alert
Product: glibc
Version: 2.34
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: gjover at sipwise dot com
CC: drepper.fsp at gmail dot com
Target Milestone: ---
The fallback definition for _Static_assert in <sys/cdefs.h>, which is currently
(as of git HEAD glibc-2.33.9000-613-g4d4bb451d5f):
#if (!defined _Static_assert && !defined __cplusplus \
&& (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112 \
&& (!__GNUC_PREREQ (4, 6) || defined __STRICT_ANSI__))
# define _Static_assert(expr, diagnostic) \
extern int (*__Static_assert_function (void)) \
[!!sizeof (struct { int __error_if_negative: (expr) ? 2 : -1; })]
#endif
causes the lgtm.com analyzer to trigger, on code using that keyword, the
following alert:
https://lgtm.com/rules/1506024027114/
which is described as:
Ambiguously signed bit-field member
Bit fields with integral types should have explicit signedness only. For
example, use `unsigned int` rather than `int`. It is implementation specific
whether an `int`-typed bit field is signed, so there could be unexpected sign
extension or overflow.
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* [Bug libc/27885] _Static_assert fallback definition in <sys/cdefs.h> triggers a lgtm.com alert
2021-05-18 12:28 [Bug libc/27885] New: _Static_assert fallback definition in <sys/cdefs.h> triggers a lgtm.com alert gjover at sipwise dot com
@ 2023-07-03 1:53 ` ppluzhnikov at google dot com
0 siblings, 0 replies; 2+ messages in thread
From: ppluzhnikov at google dot com @ 2023-07-03 1:53 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27885
Paul Pluzhnikov <ppluzhnikov at google dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2023-07-03
Status|UNCONFIRMED |NEW
CC| |ppluzhnikov at google dot com
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2021-05-18 12:28 [Bug libc/27885] New: _Static_assert fallback definition in <sys/cdefs.h> triggers a lgtm.com alert gjover at sipwise dot com
2023-07-03 1:53 ` [Bug libc/27885] " ppluzhnikov at google dot com
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