https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66345
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Component|c |middle-end
Known to work| |4.8.4, 4.9.2
Summary|internal compiler error: |[5/6 Regression] internal
|Segmentation fault -- |compiler error:
|raidctl.c 'do_meter' |Segmentation fault
Known to fail| |5.0, 6.0
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat raidctl.i
extern int snprintf(char *, unsigned long, const char *, ...);
const char a[] = "";
int b;
void
get_bar () { snprintf (0, 0, "%s", &a[b]); }
markus@x4 tmp % gcc -c -O2 raidctl.i
raidctl.i: In function ‘get_bar’:
raidctl.i:5:1: internal compiler error: tree check: expected integer_cst, have
negate_expr in decompose, at tree.h:4929
get_bar () { snprintf (0, 0, "%s", &a[b]); }
^
0xd3447c tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/gcc/tree.c:9352
0x58db55 tree_check(tree_node const*, char const*, int, char const*, tree_code)
../../gcc/gcc/tree.h:3113
0x58db55 wi::int_traits<tree_node const*>::decompose(long*, unsigned int,
tree_node const*)
../../gcc/gcc/tree.h:4929
0xd39d2a wi::int_traits<tree_node const*>::decompose(long*, unsigned int,
tree_node const*)
../../gcc/gcc/tree.h:3060
0xd39d2a wide_int_ref_storage<false>::wide_int_ref_storage<tree_node
const*>(tree_node const* const&, unsigned int)
../../gcc/gcc/wide-int.h:957
0xd39d2a generic_wide_int<wide_int_ref_storage<false>
>::generic_wide_int<tree_node const*>(tree_node const* const&, unsigned int)
../../gcc/gcc/wide-int.h:733
0xd39d2a bool wi::eq_p<tree_node const*, int>(tree_node const* const&, int
const&)
../../gcc/gcc/wide-int.h:1715
0xd39d2a tree_int_cst_sgn(tree_node const*)
../../gcc/gcc/tree.c:7239
0xd3a95e compare_tree_int(tree_node const*, unsigned long)
../../gcc/gcc/tree.c:7448
0x85e27c gimple_fold_builtin_snprintf
../../gcc/gcc/gimple-fold.c:2543
0x85e27c gimple_fold_builtin
../../gcc/gcc/gimple-fold.c:2954
0x8604b0 gimple_fold_call
../../gcc/gcc/gimple-fold.c:3182
0x8604b0 fold_stmt_1
../../gcc/gcc/gimple-fold.c:3677
0xbf86b7 execute
../../gcc/gcc/tree-ssa-forwprop.c:2350
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
