[Bug c++/85912] New: -fdump-lang-raw ICE on valid code

[romain.geissler at amadeus dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85912

            Bug ID: 85912
           Summary: -fdump-lang-raw ICE on valid code
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: romain.geissler at amadeus dot com
  Target Milestone: ---

Hi,

This simple snippet, when built with -fdump-lang-raw will ICE:

cat test.cpp
void f()
{           
    switch(1)
    {
        case 1:
            break;
    }
}

int i;


/opt/1A/toolchain/x86_64-2.6.32-v4/bin/g++ -fdump-lang-raw -c test.cpp
test.cpp:10:6: internal compiler error: Segmentation fault
 int i;
      ^ 
0xd88197 ???
        /workdir/src/gcc-8.1.1/gcc/toplev.c:325
0xd790dd ???
        /workdir/src/gcc-8.1.1/gcc/tree.c:12677
0x6631aa ???
        /workdir/src/gcc-8.1.1/gcc/cp/decl2.c:4566
0x1075d15 ???
        /workdir/src/gcc-8.1.1/gcc/cp/decl2.c:5007
0xfc21e3 ???
        /workdir/src/gcc-8.1.1/gcc/toplev.c:455
0xf20969 ???
        /workdir/src/gcc-8.1.1/gcc/toplev.c:2132
0xf1f2ba ???
        /workdir/src/gcc-8.1.1/gcc/main.c:39

while it works perfectly fine without -fdump-lang-raw.

/opt/1A/toolchain/x86_64-2.6.32-v4/bin/g++ --version
g++ (GCC) 8.1.1 20180523
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Cheers,
Romain