[Bug lto/69136] [6 Regression] ICE in lto_symtab_prevailing_virtual_decl, at lto/lto-symtab.c:991

["hubicka at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69136

--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Hmm, we have:
 <function_decl 0x7ffff6cbd700 GrBufferAllocPool
    type <method_type 0x7ffff6cc10a8
        type <void_type 0x7ffff6af0150 void VOID
            align 8 symtab 0 alias set -1 structural equality
            pointer_to_this <pointer_type 0x7ffff6af02a0>>
        QI
        size <integer_cst 0x7ffff6ad7ca8 constant 8>
        unit size <integer_cst 0x7ffff6ad7cc0 constant 1>
        align 8 symtab 0 alias set -1 structural equality method basetype
<record_type 0x7ffff6cbe348 GrBufferAllocPool>
        arg-types <tree_list 0x7ffff6cbb8c0 value <pointer_type 0x7ffff6cbe3f0>
            chain <tree_list 0x7ffff6cbb898 value <integer_type 0x7ffff6adb7e0
int>
                chain <tree_list 0x7ffff6ae99b0 value <void_type 0x7ffff6af0150
void>>>>>
    nothrow public private abstract external virtual QI file
/aux/hubicka/skia.ii line 4 col 1 align 16 context <record_type 0x7ffff6cbe348
GrBufferAllocPool>>

(gdb) p decl->decl_with_vis.assembler_name
$2 = (tree) 0x0

so it seems that the decl was not seen by free_lang_data but still leaked into
the stream.