The following testcase ICEs with -std=c++11 -fstack-usage, works fine without the latter. Internal compiler error: Error reporting routines re-entered. Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. The problem is when -fstack-usage uses lang_hooks.decl_printable_name (current_function_decl, 2) late, not sure if it is because free_lang_data frees something that the C++ FE needs for it and toplevel.c shouldn't be calling that langhook so late, or if it is a C++ FE bug.
Created attachment 27554 [details] rh828003.ii
This also crashes debug_tree on the decl from within the debugger. It seems that lang_decl_name can do a fair amount of processing if v >= 2. Additionally passing TFF_NO_FUNCTION_ARGUMENTS from there fixes the crash (and would be sufficient for -fstack-usage), but this breaks __PRETTY_FUNCTION__ for example. A possible solution would be to set TFF_NO_FUNCTION_ARGUMENTS if v == 2 and use level 3 internally (in error.c and in pt.c for __PRETTY_FUNCTION__). FWIW the Ada front-end doesn't print the arguments if v == 2.
Jakub, is this still an issue?
No, it went away likely with r189298. Let me check in the testcase and close the PR.
Author: jakub Date: Mon Oct 16 08:36:06 2017 New Revision: 253778 URL: https://gcc.gnu.org/viewcvs?rev=253778&root=gcc&view=rev Log: PR c++/53574 * g++.dg/other/pr53574.C: New test. Added: trunk/gcc/testsuite/g++.dg/other/pr53574.C Modified: trunk/gcc/testsuite/ChangeLog
Fixed.