Trivial example gets incremental compilation error on network folder in windows

[TheButlah]

Reproduction

Inside WSL2:

cargo new asdf
cd asdf
cargo run

And then, inside native windows, cd into the WSL-hosted folder over the network folder. Mine is located at \\wsl$\Ubuntu-20.04\home\ryan\Programming\asdf. Then run the following, which gives the error:

cargo run

Meta

Happens on both latest stable and nightly:

rustc --version --verbose:

rustc 1.50.0-nightly (803c60218 2020-12-13)
binary: rustc
commit-hash: 803c60218ffac3384b0063c1b87ae7944163bba7
commit-date: 2020-12-13
host: x86_64-pc-windows-msvc
release: 1.50.0-nightly

Error output

error: incremental compilation: could not create session directory lock file: Incorrect function. (os error 1)

thread 'rustc' panicked at 'trying to get session directory from `IncrCompSession`: NotInitialized', compiler\rustc_session\src\session.rs:929:48
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
note: rustc 1.50.0-nightly (803c60218 2020-12-13) running on x86_64-pc-windows-msvc

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type bin

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
error: aborting due to previous error

error: could not compile `asdf`

Backtrace

I couldn't seem to get backtrace to work - maybe I didn't set my environment variable properly on windows? I'm successfully doing echo $RUST_BACKTRACE in powershell though.

[the8472]

Looks like the same issue as #66513

[TheButlah]

Yep it's the same bug. Closing in favor of that one.