[Issue 21042] Darwin_64_64 fails autotester, but no clue in log file when CFGalwaysframe is turned off

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21042

Mathias LANG <pro.mathias.lang at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |pro.mathias.lang at gmail.com

--- Comment #1 from Mathias LANG <pro.mathias.lang at gmail.com> ---
Just grep for error, and sure enough:
```
Testing memstomp
timelimit -t 10 ./generated/osx/debug/64/memstomp 
clang: error: unable to execute command: Abort trap: 6 (core dumped)
clang: error: linker command failed due to signal (use -v to see invocation)
make[2]: *** [generated/osx/release/64/allocator] Error 254
make[1]: *** [test/stdcpp/.run] Error 2
make: *** [unittest-release] Error 2
make: *** Waiting for unfinished jobs....
```

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