[rustc] panicked at compiler/rustc_errors/src/lib.rs

The following code:

#![allow(warnings)]
fn main_676106db() {
    println!("{:p}", &std::env::var::<String>);
}
fn main() {}

Resulted in this output:

thread 'rustc' (565143) panicked at compiler/rustc_errors/src/lib.rs:466:17:
`trimmed_def_paths` called, diagnostics were expected but none were emitted. Use `with_no_trimmed_paths` for debugging. This happened in the following `must_produce_diag` call's backtrace:
   0: <rustc_errors::DiagCtxtHandle>::set_must_produce_diag
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_errors/src/lib.rs:952:58
   1: <rustc_session::session::Session>::record_trimmed_def_paths
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_session/src/session.rs:537:20
   2: rustc_middle::ty::print::pretty::trimmed_def_paths
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/print/pretty.rs:3537:14
   3: rustc_query_impl::query_vtables::trimmed_def_paths::invoke_provider_fn::__rust_begin_short_backtrace
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_query_impl/src/query_vtables.rs:130:46
   4: rustc_query_impl::execution::execute_job_non_incr::<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_query_impl/src/execution.rs:391:59
   5: rustc_middle::ty::context::tls::enter_context::<rustc_query_impl::execution::execute_job_non_incr<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>::{closure#0}
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/context/tls.rs:56:9
   6: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_impl::execution::execute_job_non_incr<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>
             at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/thread/local.rs:464:12
   7: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_impl::execution::execute_job_non_incr<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>
             at /rustc/f47d5bb13648d5c859f5b438eb7dc834b9729961/library/std/src/thread/local.rs:428:20
   8: rustc_middle::ty::context::tls::enter_context::<rustc_query_impl::execution::execute_job_non_incr<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/context/tls.rs:53:9
   9: rustc_query_impl::execution::start_query::<rustc_middle::query::erase::ErasedData<[u8; 8]>, rustc_query_impl::execution::execute_job_non_incr<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}>::{closure#0}
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_query_impl/src/execution.rs:375:9
  10: rustc_middle::ty::context::tls::with_context::<rustc_query_impl::execution::start_query<rustc_middle::query::erase::ErasedData<[u8; 8]>, rustc_query_impl::execution::execute_job_non_incr<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>::{closure#0}
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/context/tls.rs:86:36
  11: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_query_impl::execution::start_query<rustc_middle::query::erase::ErasedData<[u8; 8]>, rustc_query_impl::execution::execute_job_non_incr<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/context/tls.rs:75:18
  12: rustc_middle::ty::context::tls::with_context::<rustc_query_impl::execution::start_query<rustc_middle::query::erase::ErasedData<[u8; 8]>, rustc_query_impl::execution::execute_job_non_incr<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}>::{closure#0}, rustc_middle::query::erase::ErasedData<[u8; 8]>>
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/context/tls.rs:86:5
  13: rustc_query_impl::execution::start_query::<rustc_middle::query::erase::ErasedData<[u8; 8]>, rustc_query_impl::execution::execute_job_non_incr<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>::{closure#0}>
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_query_impl/src/execution.rs:362:5
  14: rustc_query_impl::execution::execute_job_non_incr::<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_query_impl/src/execution.rs:391:17
  15: rustc_query_impl::execution::try_execute_query::<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>, false>
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_query_impl/src/execution.rs:262:17
  16: rustc_query_impl::execution::execute_query_non_incr_inner::<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_query_impl/src/execution.rs:576:5
  17: rustc_query_impl::query_vtables::trimmed_def_paths::execute_query_non_incr::__rust_end_short_backtrace
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_query_impl/src/query_vtables.rs:94:30
  18: rustc_middle::query::calls::query_get_at::<rustc_middle::query::caches::SingleCache<rustc_middle::query::erase::ErasedData<[u8; 8]>>>
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/query/calls.rs:154:17
  19: <rustc_middle::query::calls::TyCtxtAt>::trimmed_def_paths
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/query/query_api.rs:287:61
  20: <rustc_middle::ty::context::TyCtxt>::trimmed_def_paths
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/query/query_api.rs:277:39
  21: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::pretty::PrettyPrinter>::try_print_trimmed_def_path
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/print/pretty.rs:460:46
  22: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::Printer>::print_def_path
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/print/pretty.rs:2233:24
  23: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::pretty::PrettyPrinter>::pretty_print_type
  24: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::Printer>::print_type
  25: <rustc_middle::ty::Ty as rustc_middle::ty::print::Print<rustc_middle::ty::print::pretty::FmtPrinter>>::print
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/print/mod.rs:361:11
  26: <rustc_middle::ty::Term as rustc_middle::ty::print::Print<rustc_middle::ty::print::pretty::FmtPrinter>>::print
             at /home/fuzz/WorkSpace/fusion-fuzz/projects/rust/rust-src/compiler/rustc_middle/src/ty/print/pretty.rs:3405:36
... (backtrace truncated)

To reproduce:

rustc ./min.rs

Compiler version:

rustc 1.100.0-dev

Commit:

58ae2c4315128abc40be24b429dfb68bf27510b3

Build configuration:

./x.py build --stage 1 with bootstrap.toml:
rust.debug-assertions = true
rust.overflow-checks = true
llvm.assertions = true
llvm.download-ci-llvm = true

Operating System:

Ubuntu, x86_64-unknown-linux-gnu (Docker image fusionf-fuzz-rust:latest)

This bug was found by fusion-fuzz.