[Bug c++/82230] [8 Regression] ICE: in tsubst, at cp/pt.c:13686 when binding lambda to variable inside a generic lambda inside a template member function inside a template class

[paolo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82230

--- Comment #6 from paolo at gcc dot gnu.org  ---
Author: paolo
Date: Wed Oct 11 09:04:29 2017
New Revision: 253631

URL: https://gcc.gnu.org/viewcvs?rev=253631=gcc=rev
Log:
2017-10-11  Paolo Carlini  

PR c++/82230
* g++.dg/cpp1y/lambda-generic-ice8.C: New.

Added:
trunk/gcc/testsuite/g++.dg/cpp1y/lambda-generic-ice8.C
Modified:
trunk/gcc/testsuite/ChangeLog

[Bug c++/82230] [8 Regression] ICE: in tsubst, at cp/pt.c:13686 when binding lambda to variable inside a generic lambda inside a template member function inside a template class

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82230

Markus Trippelsdorf  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |FIXED

--- Comment #5 from Markus Trippelsdorf  ---
Fixed by r253601.

[Bug c++/82230] [8 Regression] ICE: in tsubst, at cp/pt.c:13686 when binding lambda to variable inside a generic lambda inside a template member function inside a template class

[xerofoify at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82230

nik  changed:

   What|Removed |Added

 CC||xerofoify at gmail dot com

--- Comment #4 from nik  ---
I have new to the project but after looking at the code in semantics.c that was
changed by that commit pointed out. It seems that a else above this if
statement was removed:

if (containing_function && DECL_TEMPLATE_INFO (context)
&& LAMBDA_FUNCTION_P (containing_function))

which in term means that:
containing_function = NULL_TREE;

is a NULL_TREE I assume that means it points to a nullptr or null pointer.
Therefore we may be passing in a null tree to an incorrect branch due to the
missing else. Seems it your trace, semantics.c is being called so it may be
this. Anybody have any comments?