[Bug c++/99543] New: ICE module compilation ../../gcc/toplev.c:327

["ryan.burn at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99543

            Bug ID: 99543
           Summary: ICE module compilation  ../../gcc/toplev.c:327
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ryan.burn at gmail dot com
  Target Milestone: ---

Here is the stacktrace.

It happened when I tried to compile a header module that imported another
header module:

// a.h
import <iostream>;



SUBCOMMAND: # //example/header-module:a_hdr [action 'Action
example/header-module/a.h.gcm', configuration:
86d23d2b5aedbeecfc6e6954ea9486ec39e9e40bcbc4b17cec46a06eed198d11, execution
platform: @local_config_platform//:host]
(cd
/root/.cache/bazel/_bazel_root/f8087e59fd95af1ae29e8fcb7ff1a3dc/execroot/com_github_rnburn_bazel_cpp20_modules
&& \
  exec env - \
  bazel-out/k8-opt-exec-2B5CBBC6/bin/util/process_wrapper/process_wrapper --
/usr/local/bin/gcc -U_FORTIFY_SOURCE -fstack-protector -Wall
-Wunused-but-set-parameter -Wno-free-nonheap-object -fno-omit-frame-pointer
'-std=c++0x'
-Ibazel-out/k8-fastbuild/bin/example/header-module/system/iostream-include -x
c++-header -fmodules-ts '-std=c++20' -fno-canonical-system-headers
-Wno-builtin-macro-redefined '-D__DATE__="redacted"'
'-D__TIMESTAMP__="redacted"' '-D__TIME__="redacted"' -c
example/header-module/a.h
'-fmodule-mapper=bazel-out/k8-fastbuild/bin/example/header-module/a_hdr-module-map'
-iquote .)
INFO: From Action example/header-module/a.h.gcm:
example/header-module/a.h: internal compiler error: Segmentation fault
0x10a9ccf crash_signal
        ../../gcc/toplev.c:327
0x1c671d6 get_location_from_adhoc_loc(line_maps const*, unsigned int)
        ../../libcpp/line-map.c:257
0x9ff6dd module_state::write_location(bytes_out&, unsigned int)
        ../../gcc/cp/module.cc:15569
0xa01faf module_state::write_define(bytes_out&, cpp_macro const*, bool)
        ../../gcc/cp/module.cc:16337
0xa0340a module_state::write_macros(elf_out*, cpp_reader*, unsigned int*)
        ../../gcc/cp/module.cc:16839
0xa16218 module_state::write(elf_out*, cpp_reader*)
        ../../gcc/cp/module.cc:17713
0xa168f5 finish_module_processing(cpp_reader*)
        ../../gcc/cp/module.cc:19728
0x9aaa8b c_parse_final_cleanups()
        ../../gcc/cp/decl2.c:5170
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.


gcc version
root@748001480fc4:/src# g++ --version
g++ (GCC) 11.0.0 20201218 (experimental)
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