fmt/print related errors caused by some println!

[jiezhoucs]

Code

Under this revision (82dac19), when the _DEBUG is turned on, compiling exa throws an internal compiler error: trimmed_def_paths constructed. However, when only compiling to mir (cargo rustc -- -C opt-level=O3 --emit=mir). There is no error.

See the Error Output and Backtrace sections for more details.

Meta

rustc --version --verbose:

rustc 1.58.1-dev
binary: rustc
commit-hash: unknown
commit-date: unknown
host: aarch64-apple-darwin
release: 1.58.1-dev
LLVM version: 13.0.0

Error output

error: internal compiler error: trimmed_def_paths constructed
  |
  = note: delayed at    0: std::backtrace::Backtrace::create
             1: <rustc_errors::Handler>::delay_good_path_bug
             2: rustc_middle::ty::print::pretty::trimmed_def_paths
             3: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::ArenaCache<(), std::collections::hash::map::HashMap<rustc_span::def_id::DefId, rustc_span::symbol::Symbol, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>>>
             4: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::trimmed_def_paths, rustc_query_impl::plumbing::QueryCtxt>
             5: <rustc_middle::ty::print::pretty::FmtPrinter<&mut core::fmt::Formatter> as rustc_middle::ty::print::Printer>::print_def_path
             6: <rustc_middle::ty::print::pretty::FmtPrinter<&mut core::fmt::Formatter> as rustc_middle::ty::print::Printer>::default_print_def_path
             7: <rustc_middle::ty::print::pretty::FmtPrinter<&mut core::fmt::Formatter> as rustc_middle::ty::print::Printer>::print_def_path
             8: <rustc_middle::ty::print::pretty::FmtPrinter<&mut core::fmt::Formatter> as rustc_middle::ty::print::pretty::PrettyPrinter>::pretty_print_const_value
             9: <rustc_middle::ty::print::pretty::FmtPrinter<&mut core::fmt::Formatter> as rustc_middle::ty::print::pretty::PrettyPrinter>::pretty_print_const
            10: rustc_middle::mir::pretty_print_const
            11: core::fmt::write
            12: <core::fmt::Formatter as core::fmt::Write>::write_fmt
            13: <rustc_middle::mir::Constant as core::fmt::Debug>::fmt
            14: core::fmt::write
            15: <core::fmt::Formatter as core::fmt::Write>::write_fmt
            16: <rustc_middle::mir::Operand as core::fmt::Debug>::fmt
            17: core::fmt::write
            18: <core::fmt::Formatter as core::fmt::Write>::write_fmt
            19: <rustc_middle::mir::terminator::TerminatorKind>::fmt_head::<core::fmt::Formatter>
            20: <rustc_middle::mir::terminator::TerminatorKind as core::fmt::Debug>::fmt
            21: core::fmt::write
            22: std::io::Write::write_fmt
            23: <std::io::stdio::Stdout as std::io::Write>::write_fmt
            24: std::io::stdio::print_to
            25: std::io::stdio::_print
            26: rustc_mir_transform::sandbox::unsafe_obj::find_unsafe_alloc
            27: rustc_monomorphize::collector::collect_items_rec
            28: rustc_monomorphize::collector::collect_items_rec
            29: rustc_monomorphize::collector::collect_items_rec
            30: rustc_monomorphize::collector::collect_items_rec
            31: rustc_monomorphize::collector::collect_items_rec
            32: <rustc_session::session::Session>::time::<(), rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}>
            33: rustc_monomorphize::collector::collect_crate_mono_items
            34: rustc_monomorphize::partitioning::collect_and_partition_mono_items
            35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), (&std::collections::hash::set::HashSet<rustc_span::def_id::DefId, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>, &[rustc_middle::mir::mono::CodegenUnit])>>
            36: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::collect_and_partition_mono_items, rustc_query_impl::plumbing::QueryCtxt>
            37: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
            38: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
            39: <rustc_session::session::Session>::time::<alloc::boxed::Box<dyn core::any::Any>, rustc_interface::passes::start_codegen::{closure#0}>
            40: rustc_interface::passes::start_codegen
            41: <rustc_interface::passes::QueryContext>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_errors::ErrorReported>>
            42: <rustc_interface::queries::Query<alloc::boxed::Box<dyn core::any::Any>>>::compute::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
            43: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorReported>>
            44: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
            45: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>
            46: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>
            47: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>
            48: std::panicking::try::<core::result::Result<(), rustc_errors::ErrorReported>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#1}::{closure#0}>>
            49: <<std::thread::Builder>::spawn_unchecked<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            50: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
            51: std::sys::unix::thread::Thread::new::thread_start
            52: __pthread_deallocate

Backtrace

thread 'rustc' panicked at 'no warnings or errors encountered even though `delayed_good_path_bugs` issued', compiler/rustc_errors/src/lib.rs:1188:13
stack backtrace:
   0:        0x10096d288 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd407da477e9809b0
   1:        0x10099a5a8 - core::fmt::write::h5514206b7b8e187e
   2:        0x100926c3c - std::io::Write::write_fmt::habc00467309a2677
   3:        0x10096d130 - std::sys_common::backtrace::print::h490e33d249fe4082
   4:        0x10093d7e0 - std::panicking::default_hook::{{closure}}::ha5b7c075fe3f867c
   5:        0x10093d5c4 - std::panicking::default_hook::h304e913eec9b5257
   6:        0x1070d0884 - rustc_driver[4a88768edf2c3dff]::DEFAULT_HOOK::{closure#0}::{closure#0}
   7:        0x10093dbe0 - std::panicking::rust_panic_with_hook::he65117bb3c697a5a
   8:        0x100945164 - std::panicking::begin_panic_handler::{{closure}}::hefebe5ef9bdd7a2a
   9:        0x1009450cc - std::sys_common::backtrace::__rust_end_short_backtrace::hc70a02e2cd19f5f1
  10:        0x10093d848 - _rust_begin_unwind
  11:        0x1009c3e60 - core::panicking::panic_fmt::h1582794352bf19e6
  12:        0x10a109e1c - core[37a9fba1d7524b9d]::panicking::panic_display::<&str>
  13:        0x10a10d044 - <rustc_errors[eeb3b3936c07cdb8]::HandlerInner>::flush_delayed
  14:        0x10a0ff8b0 - <rustc_errors[eeb3b3936c07cdb8]::HandlerInner as core[37a9fba1d7524b9d]::ops::drop::Drop>::drop
  15:        0x10702ca80 - core[37a9fba1d7524b9d]::ptr::drop_in_place::<rustc_errors[eeb3b3936c07cdb8]::Handler>
  16:        0x107037d68 - core[37a9fba1d7524b9d]::ptr::drop_in_place::<rustc_session[f27e863723ee2a11]::parse::ParseSess>
  17:        0x107012fd0 - core[37a9fba1d7524b9d]::ptr::drop_in_place::<alloc[43f84f09364e640d]::rc::Rc<rustc_session[f27e863723ee2a11]::session::Session>>
  18:        0x107030218 - core[37a9fba1d7524b9d]::ptr::drop_in_place::<rustc_interface[73e50c15157e510f]::interface::Compiler>
  19:        0x1070d2520 - rustc_span[1205fc9e43825545]::with_source_map::<core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>, rustc_interface[73e50c15157e510f]::interface::create_compiler_and_run<core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>, rustc_driver[4a88768edf2c3dff]::run_compiler::{closure#1}>::{closure#1}>
  20:        0x1070547c4 - rustc_interface[73e50c15157e510f]::interface::create_compiler_and_run::<core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>, rustc_driver[4a88768edf2c3dff]::run_compiler::{closure#1}>
  21:        0x10704e694 - <scoped_tls[5beec228a197c789]::ScopedKey<rustc_span[1205fc9e43825545]::SessionGlobals>>::set::<rustc_interface[73e50c15157e510f]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[73e50c15157e510f]::interface::run_compiler<core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>, rustc_driver[4a88768edf2c3dff]::run_compiler::{closure#1}>::{closure#0}, core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>>::{closure#0}::{closure#0}, core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>>
  22:        0x106ff9d9c - std[57aaebe3eaec4997]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[73e50c15157e510f]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[73e50c15157e510f]::interface::run_compiler<core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>, rustc_driver[4a88768edf2c3dff]::run_compiler::{closure#1}>::{closure#0}, core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>>::{closure#0}, core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>>
  23:        0x106ff92a4 - std[57aaebe3eaec4997]::panicking::try::<core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>, core[37a9fba1d7524b9d]::panic::unwind_safe::AssertUnwindSafe<<std[57aaebe3eaec4997]::thread::Builder>::spawn_unchecked<rustc_interface[73e50c15157e510f]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[73e50c15157e510f]::interface::run_compiler<core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>, rustc_driver[4a88768edf2c3dff]::run_compiler::{closure#1}>::{closure#0}, core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>>::{closure#0}, core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>>::{closure#1}::{closure#0}>>
  24:        0x10705272c - <<std[57aaebe3eaec4997]::thread::Builder>::spawn_unchecked<rustc_interface[73e50c15157e510f]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[73e50c15157e510f]::interface::run_compiler<core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>, rustc_driver[4a88768edf2c3dff]::run_compiler::{closure#1}>::{closure#0}, core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>>::{closure#0}, core[37a9fba1d7524b9d]::result::Result<(), rustc_errors[eeb3b3936c07cdb8]::ErrorReported>>::{closure#1} as core[37a9fba1d7524b9d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  25:        0x10095f088 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha61109927171093b
  26:        0x100942780 - std::sys::unix::thread::Thread::new::thread_start::h114291dc7d1e569e
  27:        0x1b6b1826c - __pthread_deallocate