[Bug c++/86740] [8 Regression] ICE with hana and nested lambdas (likely a regression, tsubst_copy, at cp/pt.c:15325)

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86740

Jason Merrill  changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
 Resolution|--- |FIXED

--- Comment #9 from Jason Merrill  ---
Fixed for 8.3 as well.

[Bug c++/86740] [8 Regression] ICE with hana and nested lambdas (likely a regression, tsubst_copy, at cp/pt.c:15325)

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86740

--- Comment #8 from Jason Merrill  ---
Author: jason
Date: Sun Jan 27 20:31:37 2019
New Revision: 268324

URL: https://gcc.gnu.org/viewcvs?rev=268324=gcc=rev
Log:
PR c++/86740, ICE with constexpr if and nested generic lambdas.

When we partially instantiate the constexpr if, we walk through its body to
see what it uses from the enclosing local_specializations.  That walk was
overlooking the use of 'count' in the captures of the innermost lambda,
because we weren't walking into the capture list.

* tree.c (cp_walk_subtrees): Handle LAMBDA_EXPR.

Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp1z/constexpr-if25.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/tree.c

[Bug c++/86740] [8 Regression] ICE with hana and nested lambdas (likely a regression, tsubst_copy, at cp/pt.c:15325)

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86740

Jason Merrill  changed:

   What|Removed |Added

  Known to work||9.0
Summary|[8/9 Regression] ICE with   |[8 Regression] ICE with
   |hana and nested lambdas |hana and nested lambdas
   |(likely a regression,   |(likely a regression,
   |tsubst_copy, at |tsubst_copy, at
   |cp/pt.c:15325)  |cp/pt.c:15325)
  Known to fail|9.0 |

--- Comment #7 from Jason Merrill  ---
Fixed on trunk so far.