exported_symbols unstable fingerprint error

[Aaron1011]

The same error with Rust 1.52 running under cargo-tarpaulin

/usr/share/rust/.cargo/bin/cargo tarpaulin --out Xml --all
May 08 06:25:46.057  INFO cargo_tarpaulin: Running Tarpaulin
May 08 06:25:46.057  INFO cargo_tarpaulin: Building project
May 08 06:25:46.057  INFO cargo_tarpaulin::cargo: Cleaning project
...
thread 'rustc' panicked at 'found unstable fingerprints for exported_symbols(bstr[a229]): [(NonGeneric(DefId(19:1743 ~ bstr[a229]::unicode::fsm::grapheme_break_fwd::{impl#0}::deref)), Rust), (NonGeneric(DefId(19:1753 ~ bstr[a229]::unicode::fsm::grapheme_break_fwd::{impl#1}::initialize)), Rust), (NonGeneric(DefId(19:1760 ~ bstr[a229]::unicode::fsm::grapheme_break_rev::{impl#0}::deref)), Rust), (NonGeneric(DefId(19:1770 ~ bstr[a229]::unicode::fsm::grapheme_break_rev::{impl#1}::initialize)), Rust), (NonGeneric(DefId(19:1794 ~ bstr[a229]::unicode::fsm::sentence_break_fwd::{impl#0}::deref)), Rust), (NonGeneric(DefId(19:1804 ~ bstr[a229]::unicode::fsm::sentence_break_fwd::{impl#1}::initialize)), Rust), (Generic(DefId(22:139 ~ regex_automata[88e7]::dense_imp::{impl#7}::is_anchored), [&[u16], u16]), Rust), (Generic(DefId(22:139 ~ regex_automata[88e7]::dense_imp::{impl#7}::is_anchored), [&[u8], u8]), Rust), (Generic(DefId(22:135 ~ regex_automata[88e7]::dense_imp::{impl#7}::start_state), [&[u16], u16]), Rust), (Generic(DefId(22:135 ~ regex_automata[88e7]::dense_imp::{impl#7}::start_state), [&[u8], u8]), Rust), (Generic(DefId(22:137 ~ regex_automata[88e7]::dense_imp::{impl#7}::is_dead_state), [&[u16], u16]), Rust), (Generic(DefId(22:137 ~ regex_automata[88e7]::dense_imp::{impl#7}::is_dead_state), [&[u8], u8]), Rust), (Generic(DefId(22:136 ~ regex_automata[88e7]::dense_imp::{impl#7}::is_match_state), [&[u16], u16]), Rust), (Generic(DefId(22:136 ~ regex_automata[88e7]::dense_imp::{impl#7}::is_match_state), [&[u8], u8]), Rust), (Generic(DefId(22:141 ~ regex_automata[88e7]::dense_imp::{impl#7}::next_state_unchecked), [&[u16], u16]), Rust), (Generic(DefId(22:141 ~ regex_automata[88e7]::dense_imp::{impl#7}::next_state_unchecked), [&[u8], u8]), Rust), (Generic(DefId(22:138 ~ regex_automata[88e7]::dense_imp::{impl#7}::is_match_or_dead_state), [&[u16], u16]), Rust), (Generic(DefId(22:138 ~ regex_automata[88e7]::dense_imp::{impl#7}::is_match_or_dead_state), [&[u8], u8]), Rust), (NonGeneric(DefId(19:1777 ~ bstr[a229]::unicode::fsm::regional_indicator_rev::{impl#0}::deref)), Rust), (NonGeneric(DefId(19:1787 ~ bstr[a229]::unicode::fsm::regional_indicator_rev::{impl#1}::initialize)), Rust), (Generic(DefId(2:9271 ~ core[b0ed]::slice::index::{impl#5}::get_unchecked_mut), [u8]), Rust), (Generic(DefId(2:9273 ~ core[b0ed]::slice::index::{impl#5}::index_mut), [u8]), Rust), (Generic(DefId(5:6208 ~ alloc[9520]::vec::drain::{impl#6}::next_back), [ReErased, u8, std::alloc::Global]), Rust), (Generic(DefId(5:6209 ~ alloc[9520]::vec::drain::{impl#6}::next_back::{closure#0}), [ReErased, u8, std::alloc::Global, i32, extern "rust-call" fn((&u8,)) -> u8, ()]), Rust), (NonGeneric(DefId(19:1828 ~ bstr[a229]::unicode::fsm::whitespace_anchored_fwd::{impl#0}::deref)), Rust), (NonGeneric(DefId(19:1838 ~ bstr[a229]::unicode::fsm::whitespace_anchored_fwd::{impl#1}::initialize)), Rust), (NonGeneric(DefId(19:1845 ~ bstr[a229]::unicode::fsm::whitespace_anchored_rev::{impl#0}::deref)), Rust), (NonGeneric(DefId(19:1855 ~ bstr[a229]::unicode::fsm::whitespace_anchored_rev::{impl#1}::initialize)), Rust), (Generic(DefId(2:9290 ~ core[b0ed]::slice::index::{impl#7}::index), [u8]), Rust), (Generic(DefId(2:9291 ~ core[b0ed]::slice::index::{impl#7}::index_mut), [u8]), Rust), (Generic(DefId(2:9299 ~ core[b0ed]::slice::index::{impl#8}::index), [u8]), Rust), (Generic(DefId(2:9300 ~ core[b0ed]::slice::index::{impl#8}::index_mut), [u8]), Rust), (Generic(DefId(24:30 ~ lazy_static[bac5]::lazy::{impl#0}::get::{closure#0}), [regex_automata::sparse_imp::SparseDFA<&[u8], u32>, fn() -> regex_automata::sparse_imp::SparseDFA<&'static [u8], u32> {<bstr::unicode::fsm::sentence_break_fwd::SENTENCE_BREAK_FWD as std::ops::Deref>::deref::__static_ref_initialize}, i32, extern "rust-call" fn(()), (&&lazy_static::lazy::Lazy<regex_automata::sparse_imp::SparseDFA<&[u8], u32>>, fn() -> regex_automata::sparse_imp::SparseDFA<&'static [u8], u32> {<bstr::unicode::fsm::sentence_break_fwd::SENTENCE_BREAK_FWD as std::ops::Deref>::deref::__static_ref_initialize})]), Rust), (Generic(DefId(24:30 ~ lazy_static[bac5]::lazy::{impl#0}::get::{closure#0}), [regex_automata::dense_imp::DenseDFA<&[u8], u8>, fn() -> regex_automata::dense_imp::DenseDFA<&'static [u8], u8> {<bstr::unicode::fsm::whitespace_anchored_fwd::WHITESPACE_ANCHORED_FWD as std::ops::Deref>::deref::__static_ref_initialize}, i32, extern "rust-call" fn(()), (&&lazy_static::lazy::Lazy<regex_automata::dense_imp::DenseDFA<&[u8], u8>>, fn() -> regex_automata::dense_imp::DenseDFA<&'static [u8], u8> {<bstr::unicode::fsm::whitespace_anchored_fwd::WHITESPACE_ANCHORED_FWD as std::ops::Deref>::deref::__static_ref_initialize})]), Rust), (Generic(DefId(24:30 ~ lazy_static[bac5]::lazy::{impl#0}::get::{closure#0}), [regex_automata::sparse_imp::SparseDFA<&[u8], u16>, fn() -> regex_automata::sparse_imp::SparseDFA<&'static [u8], u16> {<bstr::unicode::fsm::grapheme_break_fwd::GRAPHEME_BREAK_FWD as std::ops::Deref>::deref::__static_ref_initialize}, i32, extern "rust-call" fn(()), (&&lazy_static::lazy::Lazy<regex_automata::sparse_imp::SparseDFA<&[u8], u16>>, fn() -> regex_automata::sparse_imp::SparseDFA<&'static [u8], u16> {<bstr::unicode::fsm::grapheme_break_fwd::GRAPHEME_BREAK_FWD as std::ops::Deref>::deref::__static_ref_initialize})]), Rust), (Generic(DefId(24:30 ~ lazy_static[bac5]::lazy::{impl#0}::get::{closure#0}), [regex_automata::sparse_imp::SparseDFA<&[u8], u32>, fn() -> regex_automata::sparse_imp::SparseDFA<&'static [u8], u32> {<bstr::unicode::fsm::word_break_fwd::WORD_BREAK_FWD as std::ops::Deref>::deref::__static_ref_initialize}, i32, extern "rust-call" fn(()), (&&lazy_static::lazy::Lazy<regex_automata::sparse_imp::SparseDFA<&[u8], u32>>, fn() -> regex_automata::sparse_imp::SparseDFA<&'static [u8], u32> {<bstr::unicode::fsm::word_break_fwd::WORD_BREAK_FWD as std::ops::Deref>::deref::__static_ref_initialize})]), Rust), (Generic(DefId(24:30 ~ lazy_static[bac5]::lazy::{impl#0}::get::{closure#0}), [regex_automata::dense_imp::DenseDFA<&[u8], u8>, fn() -> regex_automata::dense_imp::DenseDFA<&'static [u8], u8> {<bstr::unicode::fsm::regional_indicator_rev::REGIONAL_INDICATOR_REV as std::ops::Deref>::deref::__static_ref_initialize}, i32, extern "rust-call" fn(()), (&&lazy_static::lazy::Lazy<regex_automata::dense_imp::DenseDFA<&[u8], u8>>, fn() -> regex_automata::dense_imp::DenseDFA<&'static [u8], u8> {<bstr::unicode::fsm::regional_indicator_rev::REGIONAL_INDICATOR_REV as std::ops::Deref>::deref::__static_ref_initialize})]), Rust), (Generic(DefId(24:30 ~ lazy_static[bac5]::lazy::{impl#0}::get::{closure#0}), [regex_automata::sparse_imp::SparseDFA<&[u8], u16>, fn() -> regex_automata::sparse_imp::SparseDFA<&'static [u8], u16> {<bstr::unicode::fsm::grapheme_break_rev::GRAPHEME_BREAK_REV as std::ops::Deref>::deref::__static_ref_initialize}, i32, extern "rust-call" fn(()), (&&lazy_static::lazy::Lazy<regex_automata::sparse_imp::SparseDFA<&[u8], u16>>, fn() -> regex_automata::sparse_imp::SparseDFA<&'static [u8], u16> {<bstr::unicode::fsm::grapheme_break_rev::GRAPHEME_BREAK_REV as std::ops::Deref>::deref::__static_ref_initialize})]), Rust), (Generic(DefId(24:30 ~ lazy_static[bac5]::lazy::{impl#0}::get::{closure#0}), [regex_automata::dense_imp::DenseDFA<&[u16], u16>, fn() -> regex_automata::dense_imp::DenseDFA<&'static [u16], u16> {<bstr::unicode::fsm::whitespace_anchored_rev::WHITESPACE_ANCHORED_REV as std::ops::Deref>::deref::__static_ref_initialize}, i32, extern "rust-call" fn(()), (&&lazy_static::lazy::Lazy<regex_automata::dense_imp::DenseDFA<&[u16], u16>>, fn() -> regex_automata::dense_imp::DenseDFA<&'static [u16], u16> {<bstr::unicode::fsm::whitespace_anchored_rev::WHITESPACE_ANCHORED_REV as std::ops::Deref>::deref::__static_ref_initialize})]), Rust), (Generic(DefId(24:30 ~ lazy_static[bac5]::lazy::{impl#0}::get::{closure#0}), [regex_automata::sparse_imp::SparseDFA<&[u8], u16>, fn() -> regex_automata::sparse_imp::SparseDFA<&'static [u8], u16> {<bstr::unicode::fsm::simple_word_fwd::SIMPLE_WORD_FWD as std::ops::Deref>::deref::__static_ref_initialize}, i32, extern "rust-call" fn(()), (&&lazy_static::lazy::Lazy<regex_automata::sparse_imp::SparseDFA<&[u8], u16>>, fn() -> 
...
...
/rustc/88f19c6dab716c6281af7602e30f413e809c5974/compiler/rustc_query_system/src/query/plumbing.rs:593:5
note: run with  environment variable to display a backtrace

error: internal compiler error: unexpected panic
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 1.52.0 (88f19c6da 2021-05-03) running on x86_64-unknown-linux-gnu

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental -C link-dead-code -C debuginfo=2

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

query stack during panic:
#0 [exported_symbols] exported_symbols
#1 [upstream_monomorphizations] collecting available upstream monomorphizations 
end of query stack

Originally posted by @messense in #84116 (comment)

[Aaron1011]

I suspect that this is a duplicate of #84225.

@messense: If you encounter this issue again on the latest nightly, please re-open this issue.