add testcase for #15937

[bung87]

No description provided.

[c-blake]

It looks like when one adds the targets: the output expands from just the hashes/hashing to the same but with a bunch of [OK] lines? (EDIT: But maybe only on the JS backend?) Is that right? If so, maybe @bung87 can fix?

[bung87]

It looks like when one adds the targets: the output expands from just the hashes/hashing to the same but with a bunch of [OK] lines? (EDIT: But maybe only on the JS backend?) Is that right? If so, maybe @bung87 can fix?

let me handle this.

[c-blake]

Ok. FWIW, I think I am wrong about the cause of the [OK] lines. They seem to show up running nim c -r thashes.nim as well, but not in the CI. Also, the freebsd/openbsd seem to only match in the lower 52 bits of hash. Not sure what is going on there, either.

[bung87]

https://github.com/nim-lang/Nim/pull/15933/checks?check_run_id=1396512871 fails, tests/vm/tslow_tables.nim test for issue #12195 "Compile time Table[A, B] lookup performance", not sure if related, maybe the CI container runs it too slow , the test case has a constant time out : 7 seconds

[c-blake]

I've seen that timeout fail erroneously before. Someone should probably widen the timeout a little. It's hard since there is no real control over how busy is the underlying physical computer that runs the CI, but I think 2x longer at 14s would be fine.

[bung87]

OK, I'll consider that is unrelated, this PR task done .