`pkg/dds/test/dap/integration/dart_test_test ` flaky -> RuntimeError on `unittest-asserts-release-mac-arm64`

[bkonyi]

The tests

pkg/dds/test/dap/integration/dart_test_test RuntimeError (expected Pass)

are failing on configurations

unittest-asserts-release-mac-arm64

Logs.

[DanTup]

It seems like there are errors in the output when the debug adapter tries to run dart test (or dart run test:test):

STDERR output collected before app terminated:
Compilation did not produce any result. Expected file at `/Volumes/Work/s/w/itc7ufbxpn/dart-sdk-dap-testZbdZAx/appSGOmR5/.dart_tool/pub/bin/test/tmp88orE6/test.dart-3.5.0-edge.snapshot.incremental.temp`
Cannot rename file to '/Volumes/Work/s/w/itc7ufbxpn/dart-sdk-dap-testZbdZAx/appSGOmR5/.dart_tool/pub/bin/test/test.dart-3.5.0-edge.snapshot', path = '/Volumes/Work/s/w/itc7ufbxpn/dart-sdk-dap-testZbdZAx/appSGOmR5/.dart_tool/pub/bin/test/tmp88orE6/test.dart-3.5.0-edge.snapshot.incremental.temp' (OS Error: No such file or directory, errno = 2)
PathNotFoundException: Cannot rename file to '/Volumes/Work/s/w/itc7ufbxpn/dart-sdk-dap-testZbdZAx/appSGOmR5/.dart_tool/pub/bin/test/test.dart-3.5.0-edge.snapshot', path = '/Volumes/Work/s/w/itc7ufbxpn/dart-sdk-dap-testZbdZAx/appSGOmR5/.dart_tool/pub/bin/test/tmp88orE6/test.dart-3.5.0-edge.snapshot.incremental.temp' (OS Error: No such file or directory, errno = 2)

@bkonyi I'm not familiar with the file snapshot.incremental.temp, do you know who is creating and trying to rename it here? (the printed error doesn't seem to have any stack trace)

[bkonyi]

Ah, that's an artifact generated by pub when compiling the test runner. Maybe @sigurdm will have an idea as to what's going on?

[sigurdm]

Looks like compiling the test runner produced no output file.

Message is output from here:
https://github.com/dart-lang/pub/blob/be6868ba132c782d9835b1638a634ecb73428579/lib/src/dart.dart#L165

As to why that happens I have no clue.

[DanTup]

@bkonyi is there a way to see how often this is failing? (I'm curious if it was a one-off or happening a lot, and whether it's only on Mac ARM or not?)

[bkonyi]

@bkonyi is there a way to see how often this is failing? (I'm curious if it was a one-off or happening a lot, and whether it's only on Mac ARM or not?)

This particular instance appears to be failing on an ARM Mac, but we've seen a lot of failures on other configurations as well.

[DanTup]

I just reproduced this:

But I also saw this:

So I tried to run it:

Then clicked here:

And now I am unable to reproduce the failures.

@bkonyi @sigurdm could this be an infra thing? Could the newly-built dartaotruntime be being blocked by macOS?

[bkonyi]

I wonder if this is related to #55455? cc @sstrickl

[bkonyi]

Also FYI @athomas. Do we sign the bleeding edge dartaotruntime?

[HeySreelal]

Hi all, I ran into a similar issue (#55639) on Ubuntu server. Is there any fix or workaround for this yet? Thanks :)

[bkonyi]

@sigurdm is this possibly related to dart-lang/pub#4161 (comment)?