[Issue 23255] undefined reference to `_D4core8internal7switch___T14__switch_errorZQrFNaNbNiNfAyamZv'

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23255

--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject.org> ---
Looks like mixing of release and non-release causes this.

foo-release -> does not generate __switch_error.

test-non-release -> generates __switch_error, but assumes that `foo` will too,
so elides the emission.  This results in the undefined reference.

Confirmed that in 2.098, test-non-release always emits __switch_error.

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