Resolve crashes in CI for Github Actions

[LegNeato]

We are now seeing crashes in GitHub CI across all platforms and Rust versions. Tracking in rust-lang/rust#69121

[LegNeato]

I have disabled Github Actions in the UI until this is resolved.

[sagiegurari]

I wonder if this was a temporary thing which is now resolved.
i moved all my projects to github actions and they are all working well (stable, beta, nightly and specific version).

[LegNeato]

I renabled it, we shall see

[LegNeato]

Nope, still the same issue.

[sagiegurari]

looks like a rustc bug worth reporting. wdyt?

[LegNeato]

Already reported above :-)

[msdinit]

Not an expert by any means, but is there a reason for RUSTFLAGS: "-C link-dead-code"?

Does not look like that variable is set for Azure pipelines, and if I remove it, checks for nightly seem to pass for the most part.
And the other way around, running RUSTFLAGS="-C link-dead-code" cargo build --tests seem to reproduce the error locally

[LegNeato]

Nice catch! I'll look into it.

[sagiegurari]

the deadcode flag is for code coverage to be more accurate

[tyranron]

With #884 we removed the RUSTFLAGS="-C link-dead-code". So this is resolved now.