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* [Bug tree-optimization/101272] New: [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since
@ 2021-06-30 14:50 marxin at gcc dot gnu.org
2021-06-30 15:30 ` [Bug tree-optimization/101272] [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since r12-1805 msebor at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-06-30 14:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101272
Bug ID: 101272
Summary: [12 Regression] error: ‘nonnull’ argument ‘message’
compared to NULL [-Werror=nonnull-compare] since
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: msebor at gcc dot gnu.org
Target Milestone: ---
Seen in gdb package, the error is likely fine, but I'm curious why is it
visible since the mentioned revision?
$ cat gdb.ii
void internal_error(char);
struct compiled_regex {
compiled_regex(const char *) __attribute__((__nonnull__));
};
compiled_regex::compiled_regex(const char *message) {
(message != __null) ? 0 : (internal_error(0), 0);
}
$ g++ gdb.ii -c -Werror=nonnull-compare
gdb.ii: In constructor ‘compiled_regex::compiled_regex(const char*)’:
gdb.ii:6:23: error: ‘nonnull’ argument ‘message’ compared to NULL
[-Werror=nonnull-compare]
6 | (message != __null) ? 0 : (internal_error(0), 0);
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: some warnings being treated as errors
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/101272] [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since r12-1805
2021-06-30 14:50 [Bug tree-optimization/101272] New: [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since marxin at gcc dot gnu.org
@ 2021-06-30 15:30 ` msebor at gcc dot gnu.org
2021-07-01 7:16 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-06-30 15:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101272
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[12 Regression] error: |[12 Regression] error:
|‘nonnull’ argument |‘nonnull’ argument
|‘message’ compared to NULL |‘message’ compared to NULL
|[-Werror=nonnull-compare] |[-Werror=nonnull-compare]
|since |since r12-1805
Keywords| |diagnostic
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The warning is valid and expected. It started to be issued with r12-1805.
Prior to that, the parentheses around the inequality expression suppressed it,
like so:
$ cat t.C && cc1plus.r12-1804 -quiet -Wall -Werror -o/dev/null t.C
__attribute__ ((nonnull)) void
f (int *p) { p == 0 ? __builtin_abort () : (void)0; }
__attribute__ ((nonnull)) void
g (int *p) { (p == 0) ? __builtin_abort () : (void)0; }
t.C: In function ‘void f(int*)’:
t.C:2:21: error: ‘nonnull’ argument ‘p’ compared to NULL
[-Werror=nonnull-compare]
2 | f (int *p) { p == 0 ? __builtin_abort () : (void)0; }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus.r12-1804: all warnings being treated as errors
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/101272] [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since r12-1805
2021-06-30 14:50 [Bug tree-optimization/101272] New: [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since marxin at gcc dot gnu.org
2021-06-30 15:30 ` [Bug tree-optimization/101272] [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since r12-1805 msebor at gcc dot gnu.org
@ 2021-07-01 7:16 ` rguenth at gcc dot gnu.org
2021-07-01 7:19 ` marxin at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-07-01 7:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101272
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |12.0
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/101272] [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since r12-1805
2021-06-30 14:50 [Bug tree-optimization/101272] New: [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since marxin at gcc dot gnu.org
2021-06-30 15:30 ` [Bug tree-optimization/101272] [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since r12-1805 msebor at gcc dot gnu.org
2021-07-01 7:16 ` rguenth at gcc dot gnu.org
@ 2021-07-01 7:19 ` marxin at gcc dot gnu.org
2021-07-01 14:38 ` msebor at gcc dot gnu.org
2021-07-01 14:43 ` marxin at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-07-01 7:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101272
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
All right, so is the bug invalid, right?
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/101272] [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since r12-1805
2021-06-30 14:50 [Bug tree-optimization/101272] New: [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since marxin at gcc dot gnu.org
` (2 preceding siblings ...)
2021-07-01 7:19 ` marxin at gcc dot gnu.org
@ 2021-07-01 14:38 ` msebor at gcc dot gnu.org
2021-07-01 14:43 ` marxin at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-07-01 14:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101272
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |INVALID
Status|UNCONFIRMED |RESOLVED
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, let me close it.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/101272] [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since r12-1805
2021-06-30 14:50 [Bug tree-optimization/101272] New: [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since marxin at gcc dot gnu.org
` (3 preceding siblings ...)
2021-07-01 14:38 ` msebor at gcc dot gnu.org
@ 2021-07-01 14:43 ` marxin at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-07-01 14:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101272
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Btw. moved to gdb bugzilla as
https://sourceware.org/bugzilla/show_bug.cgi?id=28042.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2021-06-30 14:50 [Bug tree-optimization/101272] New: [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since marxin at gcc dot gnu.org
2021-06-30 15:30 ` [Bug tree-optimization/101272] [12 Regression] error: ‘nonnull’ argument ‘message’ compared to NULL [-Werror=nonnull-compare] since r12-1805 msebor at gcc dot gnu.org
2021-07-01 7:16 ` rguenth at gcc dot gnu.org
2021-07-01 7:19 ` marxin at gcc dot gnu.org
2021-07-01 14:38 ` msebor at gcc dot gnu.org
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