Compiling with -profile=gc makes program crash - why?

[tcak via Digitalmars-d]

On Wednesday, 20 April 2016 at 22:31:31 UTC, Ivan Kazmenko wrote:
> On Wednesday, 20 April 2016 at 22:27:36 UTC, Ivan Kazmenko 
> wrote:
>> I'm trying to use DMD option "-profile=gc".  With this option, 
>> the following simple program crashes with 2.071.0 down to 
>> 2.069.0 but still works on 2.068.2.  The command line is "dmd 
>> -g -profile=gc prfail1.d" on Windows (compiled to 32-bit by 
>> default).
>
> Ouch, meant to post to D.learn.  Sorry!
>
> Well, perhaps no point in reposting now.

You are using "spawn". So it is a multithreaded program. 
-profile=gc doesn't work with multithreadd programs. Always 
creates problems.