[Bug c++/81574] New: ICE on valid C++14 code: in canonicalize_component_ref, at gimplify.c:2481

[su at cs dot ucdavis.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81574

            Bug ID: 81574
           Summary: ICE on valid C++14 code: in
                    canonicalize_component_ref, at gimplify.c:2481
           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: ---

$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170726 (experimental) [trunk revision 250555] (GCC) 
$ 
$ clang++ -c -std=c++14 small.cpp
$ icc -c -std=c++14 small.cpp
$ 
$ g++-trunk -c -std=c++14 small.cpp
small.cpp: In lambda function:
small.cpp:5:18: error: field ‘f()::<lambda()>::<lambda()>::<b capture>’
invalidly declared function type
     [=] { return b; } ();
                  ^
small.cpp: In lambda function:
small.cpp:5:21: internal compiler error: in canonicalize_component_ref, at
gimplify.c:2481
     [=] { return b; } ();
                     ^
0xbb2693 canonicalize_component_ref
        ../../gcc-source-trunk/gcc/gimplify.c:2481
0xbc4ed7 gimplify_compound_lval
        ../../gcc-source-trunk/gcc/gimplify.c:2907
0xbbb7c1 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:11277
0xbbb9b6 gimplify_addr_expr
        ../../gcc-source-trunk/gcc/gimplify.c:5920
0xbbb9b6 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:11371
0xbced77 gimplify_modify_expr
        ../../gcc-source-trunk/gcc/gimplify.c:5513
0xbbc6d9 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:11325
0xbc0406 gimplify_stmt(tree_node**, gimple**)
        ../../gcc-source-trunk/gcc/gimplify.c:6546
0xbbcceb gimplify_and_add(tree_node*, gimple**)
        ../../gcc-source-trunk/gcc/gimplify.c:438
0xbbcceb gimplify_return_expr
        ../../gcc-source-trunk/gcc/gimplify.c:1541
0xbbcceb gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:11584
0xbc0406 gimplify_stmt(tree_node**, gimple**)
        ../../gcc-source-trunk/gcc/gimplify.c:6546
0xbbbc7b gimplify_statement_list
        ../../gcc-source-trunk/gcc/gimplify.c:1737
0xbbbc7b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:11752
0xbc0406 gimplify_stmt(tree_node**, gimple**)
        ../../gcc-source-trunk/gcc/gimplify.c:6546
0xbc17f5 gimplify_bind_expr
        ../../gcc-source-trunk/gcc/gimplify.c:1295
0xbbd826 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-source-trunk/gcc/gimplify.c:11524
0xbc0406 gimplify_stmt(tree_node**, gimple**)
        ../../gcc-source-trunk/gcc/gimplify.c:6546
0xbc25ef gimplify_body(tree_node*, bool)
        ../../gcc-source-trunk/gcc/gimplify.c:12521
0xbc2c24 gimplify_function_tree(tree_node*)
        ../../gcc-source-trunk/gcc/gimplify.c:12679
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.
$ 


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


void f ()
{
  [&b (f)]
  {
    [=] { return b; } ();
  } ();
}