rustc assertion failed with different fingerprints

[peddermaster2]

How I got this bug to show up:

• build rust-analyzer with the stable toolchain
• switch the toolchain to nightly
• (a few days pass by - I can recall how many)
• pull rust-analyzer git
• build rust-analyzer (with the nightly toolchain)

A cargo clean in the working directory works for fixing the problem.

Code

No specific code.

Meta

rustc --version --verbose:

rustc 1.53.0-nightly (42816d61e 2021-04-24)
binary: rustc
commit-hash: 42816d61ead7e46d462df997958ccfd514f8c21c
commit-date: 2021-04-24
host: x86_64-unknown-linux-gnu
release: 1.53.0-nightly
LLVM version: 12.0.0

Error output

thread 'rustc' panicked at 'assertion failed: `(left == right)`
  left: `Some(Fingerprint(17861685163013988291, 6605347323388188758))`,
 right: `Some(Fingerprint(14133554906330567943, 11607229516661027443))`: found unstable fingerprints for predicates_of(core[ec89]::ops::bit::Not): GenericPredicates { parent: None, predicates: [(Binder(TraitPredicate(<Self as std::ops::Not>), []), /home/peter/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/bit.rs:33:1: 33:14 (#0))] }', /rustc/42816d61ead7e46d462df997958ccfd514f8c21c/compiler/rustc_query_system/src/query/plumbing.rs:593:5
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 1.53.0-nightly (42816d61e 2021-04-24) running on x86_64-unknown-linux-gnu

note: compiler flags: -C opt-level=3 -C embed-bitcode=no -C debuginfo=0 -C incremental --crate-type lib

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

query stack during panic:
#0 [predicates_of] computing predicates of `std::ops::Not`
#1 [typeck] type-checking `grammar::items::fn_`
end of query stack
error: could not compile `parser`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: failed to compile `rust-analyzer v0.0.0 (/home/peter/git/rust-analyzer/crates/rust-analyzer)`, intermediate artifacts can be found at `/home/peter/git/rust-analyzer/target`

Caused by:
  build failed
Error: install server

Caused by:
    command `cargo install --path crates/rust-analyzer --locked --force --features force-always-assert` failed, exit status: 101

Backtrace

stack backtrace:
   0: rust_begin_unwind
             at /rustc/42816d61ead7e46d462df997958ccfd514f8c21c/library/std/src/panicking.rs:493:5
   1: core::panicking::panic_fmt
             at /rustc/42816d61ead7e46d462df997958ccfd514f8c21c/library/core/src/panicking.rs:92:14
   2: core::panicking::assert_failed_inner
   3: core::panicking::assert_failed
   4: rustc_query_system::query::plumbing::incremental_verify_ich
   5: rustc_query_system::query::plumbing::load_from_disk_and_cache_in_memory
   6: rustc_query_system::query::plumbing::get_query_impl
   7: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::predicates_of
   8: rustc_middle::ty::generics::GenericPredicates::instantiate_into
   9: rustc_middle::ty::generics::GenericPredicates::instantiate
  10: rustc_typeck::check::method::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::lookup_method_in_trait
  11: rustc_typeck::check::op::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::lookup_op_method
  12: rustc_typeck::check::op::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_user_unop
  13: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  14: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  15: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  16: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  17: rustc_typeck::check::fn_ctxt::checks::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_stmt
  18: rustc_typeck::check::fn_ctxt::checks::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
  19: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  20: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_return_expr
  21: rustc_typeck::check::check::check_fn
  22: rustc_infer::infer::InferCtxtBuilder::enter
  23: rustc_typeck::check::typeck
  24: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  25: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  26: rustc_data_structures::stack::ensure_sufficient_stack
  27: rustc_query_system::query::plumbing::force_query_with_job
  28: rustc_query_system::query::plumbing::get_query_impl
  29: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck
  30: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::par_body_owners
  31: rustc_typeck::check::typeck_item_bodies
  32: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  33: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  34: rustc_data_structures::stack::ensure_sufficient_stack
  35: rustc_query_system::query::plumbing::force_query_with_job
  36: rustc_query_system::query::plumbing::get_query_impl
  37: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
  38: rustc_session::utils::<impl rustc_session::session::Session>::time
  39: rustc_typeck::check_crate
  40: rustc_interface::passes::analysis
  41: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  42: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  43: rustc_data_structures::stack::ensure_sufficient_stack
  44: rustc_query_system::query::plumbing::force_query_with_job
  45: rustc_query_system::query::plumbing::get_query_impl
  46: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
  47: rustc_interface::passes::QueryContext::enter
  48: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  49: rustc_span::with_source_map
  50: rustc_interface::interface::create_compiler_and_run
  51: scoped_tls::ScopedKey<T>::set
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[Aaron1011]

Duplicate of #84341. This is fixed in the latest nightly