https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79626
Bug ID: 79626
Summary: ICE on invalid code in build_temp (call.c:6489)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Reduced from a LLVM test-case, all releases I have are affected:
$ cat /tmp/ice.C
template <class a, class> struct b
{ b() b(b &) b(b< a, a > }
void c(b< int, int >(b< int, int >())
./xg++ -B. /tmp/ice.C
/tmp/ice.C:2:12: error: expected ‘;’ at end of member declaration
{ b() b(b &) b(b< a, a > }
^
/tmp/ice.C:2:19: error: expected ‘;’ at end of member declaration
{ b() b(b &) b(b< a, a > }
^
/tmp/ice.C:2:33: error: expected ‘,’ or ‘...’ before ‘}’ token
{ b() b(b &) b(b< a, a > }
^
/tmp/ice.C:2:33: error: expected ‘)’ before ‘}’ token
/tmp/ice.C:2:23: error: expected ‘;’ at end of member declaration
{ b() b(b &) b(b< a, a > }
^~~~~~~~~
/tmp/ice.C:2:34: error: expected ‘;’ after struct definition
{ b() b(b &) b(b< a, a > }
^
;
/tmp/ice.C:3:45: error: variable or field ‘c’ declared void
void c(b< int, int >(b< int, int >())
^
/tmp/ice.C: In instantiation of ‘struct b<int, int>’:
/tmp/ice.C:3:44: required from here
/tmp/ice.C:2:21: error: invalid constructor; you probably meant ‘b<int, int>
(const b<int, int>&)’
{ b() b(b &) b(b< a, a > }
^
xg++: internal compiler error: Segmentation fault (program cc1plus)
It's a stack overflow:
(gdb) bt
#0 0x0000000000759282 in cp_build_qualified_type_real (type=0x7ffff6a06150,
type_quals=0, complain=3) at ../../gcc/cp/tree.c:1121
#1 0x0000000000715976 in same_type_ignoring_top_level_qualifiers_p
(type1=<optimized out>, type2=0x7ffff6a06150) at ../../gcc/cp/typeck.c:1465
#2 0x0000000000653a29 in is_properly_derived_from (derived=0x7ffff6a06150,
base=0x7ffff6a06150) at ../../gcc/cp/call.c:8946
#3 0x00000000006547d6 in direct_reference_binding
(type=type@entry=0x7ffff6a06738, conv=0x5d399d0) at ../../gcc/cp/call.c:1495
#4 0x000000000065a1d3 in reference_binding (rto=0x7ffff6a06738,
rfrom=0x7ffff6a06150, expr=<optimized out>, c_cast_p=<optimized out>, flags=5,
complain=2) at ../../gcc/cp/call.c:1627
#5 0x00000000006593ed in implicit_conversion (to=0x7ffff6a06738,
from=0x7ffff6a06150, expr=0x7ffff6884118, c_cast_p=<optimized out>, flags=5,
complain=2) at ../../gcc/cp/call.c:1837
#6 0x000000000065ab39 in add_function_candidate
(candidates=candidates@entry=0x7ffffbfff368, fn=fn@entry=0x7ffff6a04900,
ctype=ctype@entry=0x7ffff6a06150, first_arg=<optimized out>,
args=0x7ffff5b469d8, access_path=access_path@entry=0x7ffff6a00a80,
conversion_path=0x7ffff6a00a80, flags=5, complain=3) at
../../gcc/cp/call.c:2197
#7 0x000000000065ba40 in add_candidates (fns=0x7ffff69ff820,
fns@entry=0x7ffff69ff860, first_arg=first_arg@entry=0x7ffff5b48100,
args=args@entry=0x7ffff5b469d8, return_type=return_type@entry=0x0,
explicit_targs=explicit_targs@entry=0x0,
template_only=template_only@entry=false, conversion_path=0x7ffff6a00a80,
access_path=0x7ffff6a00a80, flags=5, candidates=0x7ffffbfff368, complain=3) at
../../gcc/cp/call.c:5504
#8 0x000000000065c1e0 in build_new_method_call_1 (complain=3, fn_p=0x0,
flags=5, conversion_path=0x7ffff6a00a80, args=0x7ffff5b48100,
fns=0x7ffff69ff860, instance=0x7ffff5b48100) at ../../gcc/cp/call.c:8684
#9 build_new_method_call (instance=instance@entry=0x7ffff5b48100,
fns=0x7ffff5b472a0, args=args@entry=0x7ffffbfff468, conversion_path=<optimized
out>, flags=flags@entry=5, fn_p=fn_p@entry=0x0, complain=3) at
../../gcc/cp/call.c:8884
#10 0x0000000000655832 in build_special_member_call (instance=0x7ffff5b48100,
instance@entry=0x0, name=0x7ffff6891de0, args=args@entry=0x7ffffbfff468,
binfo=0x7ffff6a00a80, binfo@entry=0x7ffff6a06150, flags=flags@entry=5,
complain=complain@entry=3)
at ../../gcc/cp/call.c:8415
#11 0x0000000000656b5f in build_temp (complain=3, diagnostic_kind=<synthetic
pointer>, flags=5, type=0x7ffff6a06150, expr=0x7ffff6884118) at
../../gcc/cp/call.c:6489
#12 convert_like_real (convs=0x5d39860, expr=expr@entry=0x7ffff6884118,
fn=fn@entry=0x7ffff6a04700, argnum=argnum@entry=0, inner=inner@entry=0,
issue_conversion_warnings=issue_conversion_warnings@entry=true, c_cast_p=false,
complain=3) at ../../gcc/cp/call.c:6907
#13 0x000000000065d161 in build_over_call (cand=cand@entry=0x5d39890,
flags=flags@entry=5, complain=complain@entry=3) at ../../gcc/cp/call.c:7841
#14 0x000000000065c3a7 in build_new_method_call_1 (complain=3, fn_p=0x0,
flags=5, conversion_path=<optimized out>, args=0x7ffff5b480c0, fns=<optimized
out>, instance=0x7ffff5b480c0) at ../../gcc/cp/call.c:8814
#15 build_new_method_call (instance=instance@entry=0x7ffff5b480c0,
fns=0x7ffff5b47270, args=args@entry=0x7ffffbfff748, conversion_path=<optimized
out>, flags=flags@entry=5, fn_p=fn_p@entry=0x0, complain=3) at
../../gcc/cp/call.c:8884
#16 0x0000000000655832 in build_special_member_call (instance=0x7ffff5b480c0,
instance@entry=0x0, name=0x7ffff6891de0, args=args@entry=0x7ffffbfff748,
binfo=0x7ffff6a00a80, binfo@entry=0x7ffff6a06150, flags=flags@entry=5,
complain=complain@entry=3)
at ../../gcc/cp/call.c:8415
