[Bug c++/84091] New: ICE on valid C++ code: Segmentation fault

[su at cs dot ucdavis.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84091

            Bug ID: 84091
           Summary: ICE on valid C++ code: Segmentation fault
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu
  Target Milestone: ---

This appears to be a recent regression. 

$ g++tk -v
Using built-in specs.
COLLECT_GCC=g++tk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.1 20180128 (experimental) [trunk revision 257131] (GCC)
$
$ g++-7.2.0 tmp.cpp
$
$ g++tk tmp.cpp
tmp.cpp: In instantiation of ‘void f() [with <template-parameter-1-1> = int]’:
tmp.cpp:8:14:   required from here
tmp.cpp:3:15: internal compiler error: Segmentation fault
   [] { struct A {} a; } ();
               ^
0xe9e57f crash_signal
        ../../gcc-source-trunk/gcc/toplev.c:325
0x77a0a1 tree_check
        ../../gcc-source-trunk/gcc/tree.h:3131
0x77a0a1 determine_visibility(tree_node*)
        ../../gcc-source-trunk/gcc/cp/decl2.c:2472
0x7ea06a do_pushtag
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:6479
0x7ea06a pushtag(tree_node*, tree_node*, tag_scope)
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:6491
0x87fb7c lookup_template_class_1
        ../../gcc-source-trunk/gcc/cp/pt.c:8966
0x87fb7c lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
        ../../gcc-source-trunk/gcc/cp/pt.c:9168
0x875a4f tsubst_aggr_type
        ../../gcc-source-trunk/gcc/cp/pt.c:12036
0x8778b0 tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc-source-trunk/gcc/cp/pt.c:13669
0x86fa34 tsubst_decl
        ../../gcc-source-trunk/gcc/cp/pt.c:12965
0x877de6 tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc-source-trunk/gcc/cp/pt.c:13586
0x857b4c tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:16080
0x8533eb tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:16007
0x8545c8 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:16284
0x8545c8 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:16284
0x89c366 tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
        ../../gcc-source-trunk/gcc/cp/pt.c:17019
0x861011 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:18308
0x86416b tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:17628
0x853b9f tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:16800
0x855965 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:16021
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$


----------------------------------


template < typename > void f ()
{ 
  [] { struct A {} a; } ();
}

int main ()
{ 
  f < int > ();
  return 0;
}