[Bug c++/105631] GCC internal compiler error: Segmentation fault when trying to compile Qt 6.3

[ioan.mitiu at zimperium dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105631

--- Comment #2 from Ioan Angelo Mîțiu  ---
Yeah, they are part of QT-package.
I'll try to assemble a minimum project/config for reproducing it but won't be
so trivial.

[Bug c++/105631] New: GCC internal compiler error: Segmentation fault when trying to compile Qt 6.3

[ioan.mitiu at zimperium dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105631

Bug ID: 105631
   Summary: GCC internal compiler error: Segmentation fault when
trying to compile Qt 6.3
   Product: gcc
   Version: 12.1.0
Status: UNCONFIRMED
  Severity: normal
  Priority: P3
 Component: c++
  Assignee: unassigned at gcc dot gnu.org
  Reporter: ioan.mitiu at zimperium dot com
  Target Milestone: ---

Got following error when tried to compile sources after a migration from Qt
5.12.12 -> Qt 6.3:

==
/opt/qt/qt-6.3.0/include/QtCore/qfuture_impl.h:137:34: internal compiler error:
Segmentation fault
  137 | std::is_class_v
  |  ^~
0xe4c988 internal_error(char const*, ...)
???:0
0x9ecbcd class_decl_loc_t::add(cp_parser*, unsigned int, tag_types, tree_node*,
bool, bool)
???:0
0x14e7873 c_parse_file()
???:0
0x14c9d9e c_common_parse_file()
???:0
=

In order to reproduce it is needed only to have following includes:
#include 
#include 

together with a member variable like:

QFutureWatcher> targetsResultWatcher;