https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123970
Bug ID: 123970
Summary: ICE in lto_write_tree: tree code 'decltype_type' is
not supported in LTO streams
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
When compiling libstdc++-v3/testsuite/ext/iotaarray.cc with -O2 -flto
-std=gnu++26 I hit
libstdc++-v3/testsuite/ext/iotaarray.cc:20: internal compiler error: tree code
'decltype_type' is not supported in LTO streams^M
0x3d132d7 internal_error(char const*, ...)^M
/space/rguenther/src/gcc-clean/gcc/diagnostic-global-context.cc:787^M
0x1ca9d78 lto_write_tree^M
/space/rguenther/src/gcc-clean/gcc/lto-streamer-out.cc:560^M
0x1ca9ea5 lto_output_tree_1^M
/space/rguenther/src/gcc-clean/gcc/lto-streamer-out.cc:598^M
0x1caab8d DFS::DFS(output_block*, tree_node*, bool, bool, bool)^M
/space/rguenther/src/gcc-clean/gcc/lto-streamer-out.cc:898^M
0x1cb29e7 lto_output_tree(output_block*, tree_node*, bool, bool)^M
/space/rguenther/src/gcc-clean/gcc/lto-streamer-out.cc:1887^M
0x1cb5d7f write_global_stream^M
/space/rguenther/src/gcc-clean/gcc/lto-streamer-out.cc:2956^M
0x1cb5eb2 lto_output_decl_state_streams(output_block*, lto_out_decl_state*)^M
/space/rguenther/src/gcc-clean/gcc/lto-streamer-out.cc:3003^M
0x1cb71f0 produce_asm_for_decls()^M
/space/rguenther/src/gcc-clean/gcc/lto-streamer-out.cc:3427^M
0x1db0fef write_lto^M
/space/rguenther/src/gcc-clean/gcc/passes.cc:2796^M
0x1db1210 ipa_write_summaries_1^M
/space/rguenther/src/gcc-clean/gcc/passes.cc:2859^M
