[Issue 23603] ICE out of memory when using -lowmem

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23603

--- Comment #2 from Bastiaan Veelo <Bastiaan at Veelo.net> ---
I agree with your recommendations obviously, but it doesn't solve the seemingly
unexplainable cases where dmd claims to run out of memory. There is plenty of
memory available. This example succeeds when I *remove* the -lowmem option. LDC
does not run out of memory compiling the same code.

In other cases that are hard to reduce I sometimes get the above verbose
message, sometimes just "Error: out of memory", sometimes only exit code
-1073741795 (0xC000001D).

When a large code base reduces to a nice concise handfull of lines like this it
is easy to rewrite like you suggest, but this particular reduction took four
weeks to prepare and required manual steps. I have another case that is still
running, not sure if that will ever converge to reveal the problematic code.

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