https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88928
Bug ID: 88928
Summary: [9 Regression] ICE segfault in
check_address_or_pointer_of_packed_member since
r268075
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: belyshev at depni dot sinp.msu.ru
CC: hjl.tools at gmail dot com
Target Milestone: ---
// bug.c
struct a { } __attribute__((__packed__));
void c (struct a **);
void d (const struct a *b) { c ((struct a **) b); }
$ ./cc1 -quiet bug.c
bug.c: In function 'd':
bug.c:3:41: warning: converting a packed 'const struct a *' pointer (alignment
1) to 'struct a *' (alignment 8) may result in an unaligned pointer value
[-Waddress-of-packed-member]
3 | void d (const struct a *b) { c ((struct a **) b); }
| ^
bug.c:3:41: internal compiler error: Segmentation fault
0x1120e22 crash_signal
../../gcc/gcc/toplev.c:326
0x7f35308e88df ???
/build/glibc-T8GPG6/glibc-2.28/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x81a107 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
../../gcc/gcc/tree.h:3289
0x993f6f check_address_or_pointer_of_packed_member
../../gcc/gcc/c-family/c-warn.c:2762
0x9941e4 check_and_warn_address_or_pointer_of_packed_member
../../gcc/gcc/c-family/c-warn.c:2838
...
