[Bug driver/63726] New: -Xlinker --threads cause random crash on gcc 4.9.2

["dushistov at mail dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63726

            Bug ID: 63726
           Summary: -Xlinker --threads cause random crash on gcc 4.9.2
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dushistov at mail dot ru

With such simple program:
$ cat /tmp/test2.cpp 
#include <cstdio>
#include <vector>

int main()
{
        std::vector<int> v = {1, 2};
        for (auto a : v)
                printf("%d\n", a);
        return 0;
}

I get:
for i in `seq 1 10`; do g++ -std=c++11 -fuse-ld=gold -Xlinker --threads
test2.cpp; done
collect2: error: ld terminated with signal 11 [Segmentation fault]
*** Error in
`/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/../../../../x86_64-pc-linux-gnu/bin/ld.gold':
double free or corruption (fasttop): 0x00007fa66c000d10 ***
collect2: error: ld terminated with signal 11 [Segmentation fault]
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/../../../../x86_64-pc-linux-gnu/bin/ld.gold:
fatal error: /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/crtend.o: file too short
collect2: error: ld returned 1 exit status
collect2: error: ld terminated with signal 11 [Segmentation fault]
collect2: error: ld terminated with signal 11 [Segmentation fault]
*** Error in
`/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/../../../../x86_64-pc-linux-gnu/bin/ld.gold':
double free or corruption (fasttop): 0x0000000000a50df0 ***

out of memory allocating 47278999994368 bytes after a total of
18446604027574911016 bytes
collect2: error: ld returned 1 exit status
collect2: error: ld terminated with signal 11 [Segmentation fault]

While with gcc 4.8.3 all works fine:
$ for i in `seq 1 10`; do g++ -std=c++11 -fuse-ld=gold -Xlinker --threads
test2.cpp; done
$