[Bug c++/82565] [7/8 Regression] Concept and lambda return type deduction cause compilation to crash with "mmap: Cannot allocate memory"

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82565

--- Comment #4 from Jason Merrill  ---
Author: jason
Date: Tue Mar 13 20:22:31 2018
New Revision: 258502

URL: https://gcc.gnu.org/viewcvs?rev=258502=gcc=rev
Log:
PR c++/82565 - ICE with concepts and generic lambda.

* pt.c (instantiate_decl): Clear fn_context for lambdas.

Added:
trunk/gcc/testsuite/g++.dg/concepts/lambda1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c

[Bug c++/82565] [7/8 Regression] Concept and lambda return type deduction cause compilation to crash with "mmap: Cannot allocate memory"

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82565

Jakub Jelinek  changed:

   What|Removed |Added

 CC||jakub at gcc dot gnu.org,
   ||jason at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek  ---
Started to ICE with r249323, before it was accepted.

[Bug c++/82565] [7/8 Regression] Concept and lambda return type deduction cause compilation to crash with "mmap: Cannot allocate memory"

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82565

Richard Biener  changed:

   What|Removed |Added

   Target Milestone|7.3 |7.4

--- Comment #2 from Richard Biener  ---
GCC 7.3 is being released, adjusting target milestone.

[Bug c++/82565] [7/8 Regression] Concept and lambda return type deduction cause compilation to crash with "mmap: Cannot allocate memory"

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82565

Richard Biener  changed:

   What|Removed |Added

   Priority|P3  |P2
   Target Milestone|--- |7.3

[Bug c++/82565] [7/8 Regression] Concept and lambda return type deduction cause compilation to crash with "mmap: Cannot allocate memory"

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82565

Jonathan Wakely  changed:

   What|Removed |Added

   Keywords||ice-on-valid-code
 Status|UNCONFIRMED |NEW
   Last reconfirmed||2017-11-01
  Known to work||7.1.0
Summary|Concept and lambda return   |[7/8 Regression] Concept
   |type deduction cause|and lambda return type
   |compilation to crash with   |deduction cause compilation
   |"mmap: Cannot allocate  |to crash with "mmap: Cannot
   |memory" |allocate memory"
 Ever confirmed|0   |1
  Known to fail||7.2.0, 8.0

--- Comment #1 from Jonathan Wakely  ---
Trunk gives a seemingly bogus error before the ICE:

mozilla_jwakely0/crash.cpp: In instantiation of ‘run_test()::
[with auto:1 = const std::__cxx11::basic_string]’:
mozilla_jwakely0/crash.cpp:9:12:   required from here
mozilla_jwakely0/crash.cpp:49:47: error: use of parameter from containing
function
 return object.visit([] (auto& x) { return x.empty(); });
   ^
mozilla_jwakely0/crash.cpp:49:35: note: ‘const
std::__cxx11::basic_string& x’ declared here
 return object.visit([] (auto& x) { return x.empty(); });
 ~~^
mozilla_jwakely0/crash.cpp:49:58: internal compiler error: Segmentation fault
 return object.visit([] (auto& x) { return x.empty(); });
  ^