http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47317
Summary: [4.6 Regression] ICE in fixed_type_or_null.
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: pl...@agmk.net
Created attachment 22986
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22986
testcase.
$ cgdb g++46 /* args: HesCoreConnectionUtils.ii -c -std=gnu++0x */
5785│ static tree
5786│ fixed_type_or_null (tree instance, int *nonnull, int *cdtorp)
5787│ {
5788│ #define RECUR(T) fixed_type_or_null((T), nonnull, cdtorp)
5789│
5790│ switch (TREE_CODE (instance))
5791│ {
5792│ case INDIRECT_REF:
5793├> if (POINTER_TYPE_P (TREE_TYPE (instance)))
5794│ return NULL_TREE;
5795│ else
5796│ return RECUR (TREE_OPERAND (instance, 0));
5797│
5798│ case CALL_EXPR:
5799│ /* This is a call to a constructor, hence it's never zero. */
5800│ if (TREE_HAS_CONSTRUCTOR (instance))
5801│ {
5802│ if (nonnull)
5803│ *nonnull = 1;
5804│ return TREE_TYPE (instance);
5805│ }
5806│ return NULL_TREE;
5807│
5808│ case SAVE_EXPR:
5809│ /* This is a call to a constructor, hence it's never zero. */
5810│ if (TREE_HAS_CONSTRUCTOR (instance))
(gdb) set args HesCoreConnectionUtils.ii -c -std=gnu++0x
(gdb) set follow-fork-mode child
(gdb) r
Starting program: /opt/gcc46/bin/g++46 HesCoreConnectionUtils.ii -c
-std=gnu++0x
[New process 3487]
process 3487 is executing new program:
/opt/gcc46/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/cc1plus
Program received signal SIGSEGV, Segmentation fault.
[Switching to process 3487]
0x000000000054aa3c in fixed_type_or_null (instance=<value optimized out>,
nonnull=0x0, cdtorp=0x7fffffffcefc) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/class.c:5793
(gdb) bt
#0 0x000000000054aa3c in fixed_type_or_null (instance=<value optimized out>,
nonnull=0x0, cdtorp=0x7fffffffcefc) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/class.c:5793
#1 0x000000000054ae2c in fixed_type_or_null (instance=<value optimized out>,
nonnull=0x0, cdtorp=0x7fffffffcefc) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/class.c:5912
#2 0x000000000055319b in resolves_to_fixed_type_p (instance=<value optimized
out>, nonnull=<value optimized out>) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/class.c:5945
#3 0x00000000004c057c in build_new_method_call (instance=0x7ffff41c7ab0,
fns=0x7ffff521cd00, args=<value optimized out>, conversion_path=<value
optimized out>, flags=3, fn_p=0x0, complain=1) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/c
all.c:6910
#4 0x0000000000516a10 in tsubst_copy_and_build (t=<value optimized out>,
args=<value optimized out>, complain=<value optimized out>, in_decl=<value
optimized out>, function_p=<value optimized out>,
integral_constant_expression_p=<value
optimized out>) at /home/users/pluto/src/gcc/gcc.git/gcc/cp/pt.c:12915
#5 0x0000000000519125 in fold_non_dependent_expr_sfinae (expr=0x7ffff2f22200,
complain=<value optimized out>) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/pt.c:5173
#6 0x00000000004b434f in null_ptr_cst_p (t=<value optimized out>) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/call.c:518
#7 0x00000000005012ab in build_non_dependent_expr (expr=0x7ffff2f22200) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/pt.c:18724
#8 0x00000000005ad2ce in build_x_binary_op (code=EQ_EXPR, arg1=0x7ffff2f22200,
arg1_code=ERROR_MARK, arg2=0x7ffff24a1a18, arg2_code=ERROR_MARK,
overloaded_p=<value optimized out>, complain=3) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/
typeck.c:3501
#9 0x0000000000591a62 in cp_parser_binary_expression (parser=0x7ffff55a9688,
cast_p=<value optimized out>, no_toplevel_fold_p=false,
prec=PREC_LOGICAL_AND_EXPRESSION, pidk=<value optimized out>) at
/home/users/pluto/src/gcc/gcc.git/gcc/
cp/parser.c:6934
#10 0x0000000000591de3 in cp_parser_assignment_expression
(parser=0x7ffff55a9688, cast_p=false, pidk=0x0) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/parser.c:7039
#11 0x000000000059210c in cp_parser_expression (parser=0x7ffff55a9688,
cast_p=<value optimized out>, pidk=0x0) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/parser.c:7184
#12 0x000000000059e61f in cp_parser_condition (parser=0x7ffff55a9688) at
/home/users/pluto/src/gcc/gcc.git/gcc/cp/parser.c:8696
(...)
