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[Bug c++/64466] New: A generic lambda in a class template causes an ICE in gimplify


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64466

            Bug ID: 64466
           Summary: A generic lambda in a class template causes an ICE in
                    gimplify
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ville.voutilainen at gmail dot com
                CC: jason at redhat dot com

template<typename T> struct my_queue { 
    void push(T){ } 
    void ice(){ trav([&](auto &&v){ push(v); }); } 
    template<typename F> void trav(F &&f){ f(T()); } 
}; 
template class my_queue<int>;

Clang accepts the code. gcc ICEs:

lhmouse2.cpp: In lambda function:
lhmouse2.cpp:3:41: internal compiler error: Segmentation fault
     void ice(){ trav([&](auto &&v){ push(v); }); } 
                                         ^
0xca552f crash_signal
        ../../gcc/toplev.c:358
0xa009f8 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
        ../../gcc/tree.h:2892
0xa009f8 size_binop_loc(unsigned int, tree_code, tree_node*, tree_node*)
        ../../gcc/fold-const.c:1735
0xabfa04 gimplify_compound_lval
        ../../gcc/gimplify.c:2012
0xab7619 gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gimplify.c:7686
0xac19af gimplify_call_expr
        ../../gcc/gimplify.c:2449
0xab790f gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gimplify.c:7705
0xabbe16 gimplify_stmt(tree_node**, gimple_statement_base**)
        ../../gcc/gimplify.c:5473
0xab80ee gimplify_cleanup_point_expr
        ../../gcc/gimplify.c:5249
0xab80ee gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gimplify.c:8097
0xabbe16 gimplify_stmt(tree_node**, gimple_statement_base**)
        ../../gcc/gimplify.c:5473
0xabccb5 gimplify_bind_expr
        ../../gcc/gimplify.c:1110
0xab78ed gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gimplify.c:7931
0xabbe16 gimplify_stmt(tree_node**, gimple_statement_base**)
        ../../gcc/gimplify.c:5473
0xabd775 gimplify_body(tree_node*, bool)
        ../../gcc/gimplify.c:8843
0xabdd76 gimplify_function_tree(tree_node*)
        ../../gcc/gimplify.c:8996
0x903397 cgraph_node::analyze()
        ../../gcc/cgraphunit.c:613
0x905c57 analyze_functions
        ../../gcc/cgraphunit.c:1001
0x906855 symbol_table::finalize_compilation_unit()
        ../../gcc/cgraphunit.c:2351
0x6e3a8b cp_write_global_declarations()
        ../../gcc/cp/decl2.c:4742
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.


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