https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89940
Bug ID: 89940
Summary: Template substitution causes segfault
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jonehartnett at yahoo dot com
Target Milestone: ---
Created attachment 46078
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46078&action=edit
Preprocessed source file
GCC: 8.20 and 7.3.0
System: Ubuntu 18.04
Target: x86_64-linux-gnu
Command: gcc main.cpp
Output:
main.cpp: In substitution of ‘template<int Y> using C = B<int, Y> [with int Y =
D<W>()]’:
main.cpp:21:13: required from here
main.cpp:12:20: internal compiler error: Segmentation fault
using C = B<int, Y>;
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
The code provided has been simplified to highlight the conditions required to
trigger the error. The segfault requires the following properties:
* X must be dependent on T
* B must be used indirectly through C
* Y must be the result of a constexpr
* W must be an template parameter to D
Changing or omitting any of these conditions (perhaps through manually
inlining) does not trigger the segfault.
