Fix safety issue -- freebsd core dump?

[Walter Bright]

On 8/5/2020 4:35 AM, Steven Schveighoffer wrote:
> On 8/5/20 3:47 AM, MoonlightSentinel wrote:
>> On Wednesday, 5 August 2020 at 04:50:33 UTC, Steven Schveighoffer wrote:
>>> However, FreeBSD 64-bit is core dumping when testing the compiler [3]. It 
>>> seems consistent, but also seems like it doesn't make sense for that change 
>>> to cause that, and only on one platform.
>>
>> This seems to be a regression which got introduced a few days ago.
> 
> You are right, it seems to be happening on Master, and on Linux too.
> 
> -Steve

It's been there for a bit, see https://github.com/dlang/dmd/pull/11508