https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92815
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-12-05
Blocks| |88443
Summary|spurious |[8/9/10 Regression]
|-Wstringop-overflow writing |spurious
|into a flexible array of an |-Wstringop-overflow writing
|extern struct |into a flexible array of an
| |extern struct
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The full test case is:
struct S { int n; char ax[]; };
extern struct S s /* = { 5, { 1, 2, 3, 4, 5 } } */;
void g (void)
{
__builtin_strcpy (s.ax, "123");
}
The false positive warning has been issued since r243419 (GCC 7.0):
r243419 | msebor | 2016-12-07 19:01:33 -0500 (Wed, 07 Dec 2016) | 68 lines
PR c/53562 - Add -Werror= support for -D_FORTIFY_SOURCE /
__builtin___memcpy_chk
PR middle-end/77784 - duplicate warning for snprintf when n > object size
PR middle-end/78149 - missing warning on strncpy buffer overflow due to an
excessive bound
PR middle-end/78138 - missing warnings on buffer overflow with non-constant
source length
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88443
[Bug 88443] [meta-bug] bogus/missing -Wstringop-overflow warnings
