Build fails after upgrade to version 1.51.0-nightly (b12290861 2021-01-29)

[benjaminSchilling33]

I'm opening this issue since Cippy told be to do it.

I'm using Github actions to build my software.
In the pipeline I'm installing the latest rust nightly build.

Yesterday I was using rust version 1.51.0-nightly (c0b64d97b 2021-01-28) and today rust version 1.51.0-nightly (b12290861 2021-01-29) is installed.

Now the error below occurs during build. Please tell me if more log data is needed.

This is not only happening with clippy, also the "regular" builds fail.

  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-clippy/issues/new
  
  note: Clippy version: clippy 0.1.51 (b122908 2021-01-29)
  
  query stack during panic:
  end of query stack
  error: could not compile `mongodb`
  
  To learn more, run the command again with --verbose.
  warning: build failed, waiting for other jobs to finish...
  {"reason":"compiler-artifact","package_id":"openidconnect 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)","target":{"kind":["lib"],"crate_types":["lib"],"name":"openidconnect","src_path":"/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/openidconnect-1.1.1/src/lib.rs","edition":"2018","doc":true,"doctest":true,"test":true},"profile":{"opt_level":"0","debuginfo":2,"debug_assertions":true,"overflow_checks":true,"test":false},"features":["default","reqwest-09"],"filenames":["/home/runner/work/lol/lol/target/debug/deps/libopenidconnect-2c8898de9d635b37.rmeta"],"executable":null,"fresh":false}
  {"reason":"build-finished","success":false}
  error: build failed
Clippy results: 0 ICE, 0 errors, 0 warnings, 0 notes, 0 help

[phansch]

Thanks for the report!

This is not only happening with clippy, also the "regular" builds fail.

If that's the case, then this is not a Clippy issue but a Rustc issue. I will try and see if can reproduce it and find an existing issue over at https://github.com/rust-lang/rust.

[phansch]

I'm able to reproduce this on mongo-rust-driver with v1.1.1 checked out and on the 2021-01-30 nightly:

git clone https://github.com/mongodb/mongo-rust-driver
cd mongo-rust-driver
git checkout v1.1.1
rustup override set nightly-2021-01-30
cargo clippy

Backtrace:

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:974:13
stack backtrace:
   0: rust_begin_unwind
             at /rustc/04caa632dd10c2bf64b69524c7f9c4c30a436877/library/std/src/panicking.rs:493:5
   1: std::panicking::begin_panic_fmt
             at /rustc/04caa632dd10c2bf64b69524c7f9c4c30a436877/library/std/src/panicking.rs:435:5
   2: rustc_errors::HandlerInner::flush_delayed
   3: <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop
   4: core::ptr::drop_in_place<rustc_session::parse::ParseSess>
   5: <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop
   6: core::ptr::drop_in_place<rustc_interface::interface::Compiler>
   7: rustc_span::with_source_map
   8: rustc_interface::interface::create_compiler_and_run

It looks like there's already an issue for this bug in rustc: rust-lang/rust#81531
As well as an open PR: rust-lang/rust#81541

Since this is not something that can or should be fixed in Clippy, I'm going to go ahead and close this issue. Thanks again for the report!