https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84162
Bug ID: 84162
Summary: Internal compiler error: in tsubst, at cp/pt.c:13617 /
SEGFAULT
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: lumosimann at gmail dot com
Target Milestone: ---
Created attachment 43316
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43316&action=edit
Segfault with flag -DV1
## Summary
Template instantiation leads to internal compile error or segfault.
## GCC version
Initially observed on GCC 7.2.1, but reproducible in all versions from 4.7.1
onwards up to 7.3 (compile using godbolt).
## Command
g++ -o out compilererror.cpp -std=c++11 -DV1
leads to a segfault
and
g++ -o out compilererror.cpp -std=c++11 -DV2
leads to an internal compiler error
## Diagnostics
# V1:
compilererror.cpp: In instantiation of ‘void C::Fail() [with void (C::* f)() =
&C::h]’:
compilererror.cpp:32:17: required from here
compilererror.cpp:25:45: internal compiler error: Segmentation fault
typename Object<C, X<int, 3>>::fail<f> a;
^
# V2:
compilererror.cpp: In instantiation of ‘void C::Fail() [with SomeEnum
<anonymous> = (SomeEnum)0; void (C::* f)() = &C::h]’:
compilererror.cpp:34:34: required from here
compilererror.cpp:25:45: internal compiler error: in tsubst, at cp/pt.c:13617
typename Object<C, X<int, 3>>::fail<f> a;
^
