[Bug gold/23607] New: gold linker --threads --thread-count,2 causes ld segmentation fault

[alexandru.dascalu94 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23607

            Bug ID: 23607
           Summary: gold linker --threads --thread-count,2 causes ld
                    segmentation fault
           Product: binutils
           Version: 2.31
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gold
          Assignee: ccoutant at gmail dot com
          Reporter: alexandru.dascalu94 at gmail dot com
                CC: ian at airs dot com
  Target Milestone: ---

The gold linker segfault at linking if it uses multiple threads.

The scenario:
  1. I have multiple source files which are compiled with gcc 8.2 with some
optimization flags
  2. I use cmake to generate the makefile.
  3. The linker crashes with segfault:  

```  
collect2: fatal error: ld terminated with signal 11 [Segmentation fault], core
dumped
compilation terminated.  
```  

  I have obtained the crash on centos 7.5, ubuntu and debian 9.5.



Test case here:
 https://github.com/alexandrudsc/gold-linker-threads-segfault  

There is a docker file, based on which you can re-create the environment I
used. 

For a simple test just run
```
bash build-docker-image.sh 
```  
this will create the docker image, it compile the code and will try to link.  


But you can start your own container if you want to run this multiple times.

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