https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105567
Bug ID: 105567 Summary: [13 regression] bootstrap failure on arm due to bogus constructor warning Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: rearnsha at gcc dot gnu.org Target Milestone: --- On arm constructors implicitly return 'this', but this is leading to a boottrap failure. Reduced testcase: typedef unsigned int size_t; template<typename, typename, typename> struct vec; template<typename T, size_t N > class auto_vec : public vec<T, va_heap> { auto_vec (size_t s ) { { return; } } }; struct function { struct control_flow_graph *cfg; }; struct edge_iterator { }; struct control_flow_graph { int x_n_basic_blocks; }; bool mark_dfs_back_edges (struct function *fun) { auto_vec<edge_iterator, 20> stack (((fun)->cfg->x_n_basic_blocks) + 1); } Compile with 'cc1plus -march=armv8-a+simd -mfloat-abi=hard -O2 -g -Wall -fno-exceptions -quiet '