https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83446
Bug ID: 83446
Summary: [8 Regression] Bootstrap failed on i686
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
With r255758, on i686, I got
In file included from ../../src-trunk/gcc/../libcpp/include/symtab.h:21,
from ../../src-trunk/gcc/../libcpp/include/cpplib.h:26,
from ../../src-trunk/gcc/c-family/c-common.h:24,
from ../../src-trunk/gcc/cp/cp-tree.h:40,
from ../../src-trunk/gcc/cp/mangle.c:52:
../../src-trunk/gcc/cp/mangle.c: In function ‘void write_number(long long
unsigned int, int, unsigned int)’:
../../src-trunk/gcc/../include/obstack.h:319:15: error: ‘void* memcpy(void*,
const void*, size_t)’ offset [65, 63] is out of the bounds [0, 64] of object
‘buffer’ with type ‘char [64]’ [-Werror=array-bounds]
memcpy (__o->next_free, where, __len); \
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../src-trunk/gcc/cp/mangle.c:252:3: note: in expansion of macro
‘obstack_grow’
obstack_grow (mangle_obstack, (CHAR), (LEN))
^~~~~~~~~~~~
../../src-trunk/gcc/cp/mangle.c:1717:3: note: in expansion of macro
‘write_chars’
write_chars (buffer + sizeof (buffer) - count, count);
^~~~~~~~~~~
../../src-trunk/gcc/cp/mangle.c:1708:8: note: ‘buffer’ declared here
char buffer[sizeof (HOST_WIDE_INT) * 8];
r255753 is OK.
