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.