https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83988
David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-01-23
CC| |dmalcolm at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
Summary|Internal compiler error in |[8 Regression] Internal
|tsubst_baselink |compiler error in
| |tsubst_baselink
Ever confirmed|0 |1
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Works with r255598.
ICEs with r255605.
Looks like r255605 may have introduced this.
Minimal reproducer:
$ cat ../../src/pr83988.C
template<class T> struct optional {};
struct get_from_json {
template<typename GetWhat>
explicit operator optional<GetWhat>() const {return optional<GetWhat> ();}
template<typename AsWhat>
optional<AsWhat> maybe() const
{
return this->operator optional<AsWhat>();
}
};
void test()
{
get_from_json().maybe<int>();
}
$ ./xg++ -B. ../../src/pr83988.C
../../src/pr83988.C: In instantiation of ‘optional<GetWhat>
get_from_json::maybe() const [with AsWhat = int]’:
../../src/pr83988.C:13:30: required from here
../../src/pr83988.C:8:27: internal compiler error: in tsubst_baselink, at
cp/pt.c:14451
return this->operator optional<AsWhat>();
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
0x93759c tsubst_baselink
../../src/gcc/cp/pt.c:14451
0x9319ba tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../src/gcc/cp/pt.c:17996
0x92f82f tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../src/gcc/cp/pt.c:17604
0x91d25c tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:16779
0x91b435 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:15996
0x91a155 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:16263
0x918913 instantiate_decl(tree_node*, bool, bool)
../../src/gcc/cp/pt.c:23329
0x95ebdf instantiate_pending_templates(int)
../../src/gcc/cp/pt.c:23445
0x836612 c_parse_final_cleanups()
../../src/gcc/cp/decl2.c:4705
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
