https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107276
Bug ID: 107276 Summary: ICE Deducting return type from ill-formed structured binding name Product: gcc Version: 13.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: johelegp at gmail dot com CC: johelegp at gmail dot com Target Milestone: --- See https://compiler-explorer.com/z/6MqKTjKd7. ```C++ auto f(auto x) { auto [y] = x; return y; } int i = f(0); ``` ``` <source>: In instantiation of 'auto f(auto:1) [with auto:1 = int]': <source>:5:10: required from here <source>:2:8: error: cannot decompose non-array non-class type 'int' 2 | auto [y] = x; | ^~~ <source>:3:10: internal compiler error: tree check: expected non_lvalue_expr or static_cast_expr, have error_mark in set_implicit_rvalue_p, at cp/cp-tree.h:8688 3 | return y; | ^ 0x236ef7e internal_error(char const*, ...) ???:0 0x95b166 tree_check_failed(tree_node const*, char const*, int, char const*, ...) ???:0 0xc9d1ca do_auto_deduction(tree_node*, tree_node*, tree_node*, int, auto_deduction_context, tree_node*, int) ???:0 0xd4e054 check_return_expr(tree_node*, bool*) ???:0 0xcf39f3 finish_return_stmt(tree_node*) ???:0 0xcad9e6 instantiate_decl(tree_node*, bool, bool) ???:0 0xb8e015 maybe_instantiate_decl(tree_node*) ???:0 0xb8fa9e mark_used(tree_node*, int) ???:0 0xad275e build_new_function_call(tree_node*, vec<tree_node*, va_gc, vl_embed>**, int) ???:0 0xcf93c8 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool, bool, int) ???:0 0xc806a7 c_parse_file() ???:0 0xdbdef9 c_common_parse_file() ???:0 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. Compiler returned: 1 ```