https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90659
Bug ID: 90659 Summary: [9/10 Regression] ICE in tree_to_uhwi, at tree.h:4352/7291 Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: gs...@t-online.de Target Milestone: --- Changed between 20190224 and 20190303 : $ cat z1.cc template <typename T> void foo (int n) { T a[n]; [=]{a;}; } void bar () { foo <double>; } $ g++-10-20190526 -c z1.cc z1.cc: In instantiation of 'void foo(int) [with T = double]': z1.cc:9:15: required from here z1.cc:5:3: internal compiler error: in tree_to_uhwi, at tree.h:4352 5 | [=]{a;}; | ^~~~~~~ 0x617f9c tree_to_uhwi(tree_node const*) ../../gcc/tree.h:4352 0x617f9c cxx_eval_vec_init_1 ../../gcc/cp/constexpr.c:3126 0x610857 cxx_eval_vec_init ../../gcc/cp/constexpr.c:3221 0x610857 cxx_eval_constant_expression ../../gcc/cp/constexpr.c:4946 0x61392e cxx_eval_outermost_constant_expr ../../gcc/cp/constexpr.c:5328 0x61617c maybe_constant_init_1 ../../gcc/cp/constexpr.c:5705 0x73f396 massage_init_elt ../../gcc/cp/typeck2.c:1348 0x73e666 process_init_constructor_record ../../gcc/cp/typeck2.c:1567 0x73e666 process_init_constructor ../../gcc/cp/typeck2.c:1841 0x73e666 digest_init_r ../../gcc/cp/typeck2.c:1239 0x708501 finish_compound_literal(tree_node*, tree_node*, int, fcl_t) ../../gcc/cp/semantics.c:2874 0x6695c4 build_lambda_object(tree_node*) ../../gcc/cp/lambda.c:117 0x6de512 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc/cp/pt.c:19547 0x6e64c9 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc/cp/pt.c:18247 0x6e64c9 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/cp/pt.c:17923 0x6e5467 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/cp/pt.c:17050 0x6e55f1 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/cp/pt.c:17036 0x6e6151 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/cp/pt.c:17330 0x6e4624 instantiate_decl(tree_node*, bool, bool) ../../gcc/cp/pt.c:24760 0x6f987b instantiate_pending_templates(int) ../../gcc/cp/pt.c:24876