Internal compiler error during compilation - a nice message with compiler sourcecode line number

[k-stanislawek]

I got the error below. The compiled project is pretty big, there is no way to include it. The compiled code has started compiling again after cargo clean. I'm submitting because of a nice log message encouraging me to do so.

Meta

rustc --version --verbose:

rustc 1.50.0-nightly (0f6f2d681 2020-12-06)
binary: rustc
commit-hash: 0f6f2d681b39c5f95459cd09cb936b6ceb27cd82
commit-date: 2020-12-06
host: x86_64-unknown-linux-gnu
release: 1.50.0-nightly

Error output

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_middle/src/ty/query/mod.rs:235:5
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 (0f6f2d681 2020-12-06) running on x86_64-unknown-linux-gnu

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

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

query stack during panic:
end of query stack

UPDATE:
Got this problem again, this time there is some more:

query stack during panic:
end of query stack
thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
  left: `LLVMing`,
 right: `Codegenning`', /rustc/0f6f2d681b39c5f95459cd09cb936b6ceb27cd82/compiler/rustc_codegen_ssa/src/back/write.rs:1425:21

I'm updating to today's nightly now.

[Aaron1011]

This looks like a duplicate of #80054, and should be fixed in the latest nightly.

[camelid]

Actually I think it's a duplicate of #79661. I'm closing the issue, but definitely re-open if it happens again!