https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118807
Bug ID: 118807
Summary: [modules] ICE in c_tree_chain_next during GGC with
explicit instantiations
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nshead at gcc dot gnu.org
Target Milestone: ---
The following sample ICEs during garbage collection on trunk:
$ cat test.cpp
module;
template <typename> class basic_streambuf;
template <typename> struct basic_streambuf {
friend void __istream_extract();
};
template class basic_streambuf<char>;
template class basic_streambuf<wchar_t>;
$ g++ -fmodules --param=ggc-min-expand=0 --param=ggc-min-heapsize=0
-Wno-global-module -S test.cpp
test.cpp:7:40: internal compiler error: Segmentation fault
7 | template class basic_streambuf<wchar_t>;
| ^
0x3ca55b1 internal_error(char const*, ...)
../../gcc/gcc/diagnostic-global-context.cc:517
0x1d14f82 crash_signal
../../gcc/gcc/toplev.cc:322
0x7f494591131f ???
./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0x135ba02 c_tree_chain_next(tree_node*)
../../gcc/gcc/c-family/c-common.h:1442
0x134e772 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:108
0x1350abb gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:453
0x1351741 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:610
0x1351bdc gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:669
0x134e576 gt_ggc_mx_lang_decl(void*)
./gt-cp-tree.h:60
0x135002f gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:345
0x117cf9d gt_ggc_mx_cp_binding_level(void*)
./gt-cp-name-lookup.h:28
0x117d04b gt_ggc_mx_cp_binding_level(void*)
./gt-cp-name-lookup.h:34
0x134e690 gt_ggc_mx_lang_decl(void*)
./gt-cp-tree.h:87
0x134f011 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:214
0x17b02e6 ggc_mark_root_tab
../../gcc/gcc/ggc-common.cc:75
0x17b0401 ggc_mark_roots()
../../gcc/gcc/ggc-common.cc:104
0x14a5373 ggc_collect(ggc_collect)
../../gcc/gcc/ggc-page.cc:2231
0x105968a c_parse_final_cleanups()
../../gcc/gcc/cp/decl2.cc:5504
0x144d679 c_common_parse_file()
../../gcc/gcc/c-family/c-opts.cc:1408
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.
This appears to have worked in GCC 14: https://godbolt.org/z/sbvPYejhE
