windows flaky tests: FAIL: tests/gc/gcleak2 C -d:release --gc:markAndSweep; tests/gc/gcleak4 C --gc:orc -d:release

[timotheecour]

new windows flaky test: FAIL: tests/gc/gcleak2 C -d:release --gc:markAndSweep

in unrelated PR #15765 https://dev.azure.com/nim-lang/Nim/_build/results?buildId=9397&view=logs&jobId=8771bebc-ff97-51ac-1845-cb5b61e3bccd&j=8771bebc-ff97-51ac-1845-cb5b61e3bccd&t=74a5fa6a-7085-521f-3e7a-45825f3ff79f

2020-11-07T01:16:00.6347096Z PASS: tests/gc/gcleak2 C  --gc:orc -d:release                      (10.71 sec)
2020-11-07T01:16:00.6348866Z PASS: tests/gc/gcleak2 C  --gc:markAndSweep                        (12.64 sec)
2020-11-07T01:16:00.6352779Z FAIL: tests/gc/gcleak2 C  -d:release --gc:markAndSweep
2020-11-07T01:16:00.6354372Z Test "tests\gc\gcleak2" in category "gc"
2020-11-07T01:16:00.6362600Z Failure: reNimcCrash
2020-11-07T01:16:00.6365483Z $ D:\a\1\s\bin\nim.exe c --hints:on -d:testing --nimblePath:tests/deps -d:release --gc:markAndSweep --nimCache:nimcache\tests\gc\gcleak2_926c8dedacb4d285dde74e79445e2a87 tests\gc\gcleak2
2020-11-07T01:16:00.6367557Z Hint: used config file 'D:\a\1\s\config\nim.cfg' [Conf]
2020-11-07T01:16:00.6374029Z Hint: used config file 'D:\a\1\s\config\config.nims' [Conf]
2020-11-07T01:16:00.6375780Z Hint: used config file 'D:\a\1\s\tests\config.nims' [Conf]
2020-11-07T01:16:00.6377510Z ....CC: stdlib_io.nim
2020-11-07T01:16:00.6379251Z CC: stdlib_system.nim
2020-11-07T01:16:00.6381374Z CC: gcleak2.nim
2020-11-07T01:16:00.6383786Z 
2020-11-07T01:16:00.6385129Z 
2020-11-07T01:16:35.3962178Z PASS: tests/views/tcan_compile_nim.nim C                           (20.64 sec)

Maybe a recent regression?

[Araq]

A regression seems unlikely as the GCs don't change anymore (except ARC/ORC of course).

[timotheecour]

A regression seems unlikely

maybe; but could be also something indirectly causing this.

another similar test failed in another PR: tests/gc/gcleak4 C --gc:orc -d:release

#15940

in https://dev.azure.com/nim-lang/255dfe86-e590-40bb-a8a2-3c0295ebdeb1/_apis/build/builds/9630/logs/89

2020-11-12T18:17:38.4683393Z PASS: tests/gc/gcleak4 C  --gc:orc                                 ( 9.31 sec)
2020-11-12T18:17:38.4684033Z FAIL: tests/gc/gcleak4 C  --gc:orc -d:release
2020-11-12T18:17:38.4684595Z Test "tests\gc\gcleak4" in category "gc"
2020-11-12T18:17:38.4685013Z Failure: reOutputsDiffer
2020-11-12T18:17:38.4685903Z Expected:
2020-11-12T18:17:38.4686205Z no leak:
2020-11-12T18:17:38.4686423Z 
2020-11-12T18:17:38.4686723Z Gotten:
2020-11-12T18:17:38.4686981Z n
2020-11-12T18:17:38.4687171Z 
2020-11-12T18:17:38.4687693Z PASS: tests/gc/gcleak4 C  --gc:markAndSweep                        ( 8.57 sec)