https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108110
Sergei Trofimovich <slyfox at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |slyfox at gcc dot gnu.org --- Comment #14 from Sergei Trofimovich <slyfox at gcc dot gnu.org> --- Got a similar ICE on minetest-5.6.1. With a bit of manual cleanup reduced down to the following: //$ cat bug.cc void __throw_out_of_range_fmt(...); char *_M_p; struct Trans_NS___cxx11_basic_string { long _M_string_length; long _M_check___pos; Trans_NS___cxx11_basic_string() { long __length = 0; _M_string_length = __length; } long size() { return _M_string_length; } long foo___pos; char foo() { return _M_p[foo___pos]; } int compare() { __throw_out_of_range_fmt(_M_check___pos, _M_string_length); __builtin_trap(); } }; bool str_starts_with(Trans_NS___cxx11_basic_string &str, Trans_NS___cxx11_basic_string prefix) { if (str.size() < prefix.size()) str.compare(); for (; prefix.size();) { char __trans_tmp_2 = prefix.foo(); if (__trans_tmp_2) return false; } __builtin_trap(); } void testStartsWith() { Trans_NS___cxx11_basic_string s1, s2; str_starts_with(s1, s2); } $ g++ -Wall -Wextra -O3 -c bug.cc during IPA pass: inline bug.cc: In function 'void testStartsWith()': bug.cc:28:18: internal compiler error: in modify_call, at ipa-param-manipulation.cc:700 28 | str_starts_with(s1, s2); | ~~~~~~~~~~~~~~~^~~~~~~~ 0x1cbdfd4 diagnostic_impl(rich_location*, diagnostic_metadata const*, int, char const*, __va_list_tag (*) [1], diagnostic_t) ???:0 0x1cbec26 internal_error(char const*, ...) ???:0 0x753df0 fancy_abort(char const*, int, char const*) ???:0 0x723afe ipa_param_adjustments::modify_call(cgraph_edge*, bool) [clone .cold] ???:0 0xa4e735 cgraph_edge::redirect_call_stmt_to_callee(cgraph_edge*) ???:0 0xec8a13 redirect_all_calls(copy_body_data*, basic_block_def*) ???:0 0xece256 copy_body(copy_body_data*, basic_block_def*, basic_block_def*, basic_block_def*) [clone .isra.0] ???:0 0xed1ded expand_call_inline(basic_block_def*, gimple*, copy_body_data*, bitmap_head*) ???:0 0xed3b69 optimize_inline_calls(tree_node*) ???:0 0xc3f753 inline_transform(cgraph_node*) ???:0 0xd8d1ff execute_all_ipa_transforms(bool) ???:0 0xa54b3f cgraph_node::expand() ???:0 0xa5604d symbol_table::compile() [clone .part.0] ???:0 0xa58517 symbol_table::finalize_compilation_unit() ???:0