[Bug middle-end/112710] New: [13/14 Regression] ICE: in write_type, at cp/mangle.cc:2226 with -fdump-go-spec=filename -flto -fno-use-linker-plugin

[Bug middle-end/112710] New: [13/14 Regression] ICE: in write_type, at cp/mangle.cc:2226 with -fdump-go-spec=filename -flto -fno-use-linker-plugin

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112710

            Bug ID: 112710
           Summary: [13/14 Regression] ICE: in write_type, at
                    cp/mangle.cc:2226 with -fdump-go-spec=filename -flto
                    -fno-use-linker-plugin
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu

Created attachment 56686
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56686&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -fdump-go-spec=filename -flto -fno-use-linker-plugin
testcase.C -w
testcase.C:2:6: internal compiler error: in write_type, at cp/mangle.cc:2226
    2 | void foo(const bool *);
      |      ^~~
0x761ff3 write_type
        /repo/gcc-trunk/gcc/cp/mangle.cc:2226
0xfcec7d write_type
        /repo/gcc-trunk/gcc/cp/mangle.cc:2398
0xfd087e write_method_parms
        /repo/gcc-trunk/gcc/cp/mangle.cc:2880
0xfd0a97 write_bare_function_type
        /repo/gcc-trunk/gcc/cp/mangle.cc:2816
0xfd0c2c write_mangled_name
        /repo/gcc-trunk/gcc/cp/mangle.cc:810
0xfd1410 mangle_decl_string
        /repo/gcc-trunk/gcc/cp/mangle.cc:4092
0xfd15fa get_mangled_id
        /repo/gcc-trunk/gcc/cp/mangle.cc:4113
0xfd15fa mangle_decl(tree_node*)
        /repo/gcc-trunk/gcc/cp/mangle.cc:4151
0x1acb60d decl_assembler_name(tree_node*)
        /repo/gcc-trunk/gcc/tree.cc:719
0x14a2f8d go_output_fndecl
        /repo/gcc-trunk/gcc/godump.cc:1109
0x14a2f8d go_finish
        /repo/gcc-trunk/gcc/godump.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.

$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-5841-20231125103155-g9866c98e101-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-5841-20231125103155-g9866c98e101-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20231125 (experimental) (GCC)

[Bug middle-end/112710] [13/14 Regression] ICE: in write_type, at cp/mangle.cc:2226 with -fdump-go-spec=filename -flto -fno-use-linker-plugin

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112710

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.3
                 CC|                            |iant at google dot com

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm not sure whether you are supposed to do -fdump-go-spec=... with -flto
(LTO scraps some FE specific data).

[Bug middle-end/112710] [13/14 Regression] ICE: in write_type, at cp/mangle.cc:2226 with -fdump-go-spec=filename -flto -fno-use-linker-plugin

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112710

Ian Lance Taylor <ian at airs dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ian at airs dot com

--- Comment #2 from Ian Lance Taylor <ian at airs dot com> ---
Also -fdump-go-spec isn't useful for C++ code.

Why does this come up?  What are you trying to do?

[Bug middle-end/112710] [13/14 Regression] ICE: in write_type, at cp/mangle.cc:2226 with -fdump-go-spec=filename -flto -fno-use-linker-plugin

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112710

--- Comment #3 from Zdenek Sojka <zsojka at seznam dot cz> ---
(In reply to Ian Lance Taylor from comment #2)
> Also -fdump-go-spec isn't useful for C++ code.
> 
> Why does this come up?  What are you trying to do?

I am trying nothing else than to crash the compiler. Please close this if you
think this is not an issue.

[Bug middle-end/112710] [13/14 Regression] ICE: in write_type, at cp/mangle.cc:2226 with -fdump-go-spec=filename -flto -fno-use-linker-plugin

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112710

Jeffrey A. Law <law at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4
                 CC|                            |law at gcc dot gnu.org