ICE: index out of bounds: the len is 1 but the index is 2' in format macro

[Cryptex-github]

Code

I don't know how this ICE happened, nor can I reproduce it on another machine. It only occurs in CI.

CI Output:
https://github.com/jay3332/Turbine/runs/7350777961

Repo:
https://github.com/jay3332/Turbine/tree/d77c84af2eb0dbd06825045ae0deb3ae18d98672

Meta

rustc --version --verbose:

rustc 1.64.0-nightly (c2f428d2f 2022-07-14)
binary: rustc
commit-hash: c2f428d2f3340a0e7d995f4726223db91b93704c
commit-date: 2022-07-14
host: x86_64-unknown-linux-gnu
release: 1.64.0-nightly
LLVM version: 14.0.6

Seems to be originating from this line: https://github.com/rust-lang/rust/blob/1219f72f9049817cf5933112f75bbddf360a7a1f/compiler/rustc_builtin_macros/src/format.rs#L1001/src/format.rs#L1001

Error output

Compiling time v0.3.11
thread 'rustc' panicked at 'index out of bounds: the len is 1 but the index is 2', compiler/rustc_builtin_macros/src/format.rs:1001:28
<stack backtrace>
Compiling time v0.1.44
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 1.64.0-nightly (c2f428d2f 2022-07-14) running on x86_64-unknown-linux-gnu
note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
end of query stack
error: could not compile `time`

Backtrace

stack backtrace:
   0:     0x7fcce027f950 - std::backtrace_rs::backtrace::libunwind::trace::heeafe1f1ea6b4c2f
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   1:     0x7fcce027f950 - std::backtrace_rs::backtrace::trace_unsynchronized::hf08684e78cd6c167
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fcce027f950 - std::sys_common::backtrace::_print_fmt::had9e99c2c8763a1e
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7fcce027f950 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1b4c432d2a1e6303
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7fcce02d8f2c - core::fmt::write::h87085de871a99231
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/core/src/fmt/mod.rs:1198:17
   5:     0x7fcce0271015 - std::io::Write::write_fmt::h7635d2f423aa55dc
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/io/mod.rs:1672:15
   6:     0x7fcce02825e1 - std::sys_common::backtrace::_print::hc003bc1c22b7967b
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7fcce02825e1 - std::sys_common::backtrace::print::h1baa1ab7758e52b0
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7fcce02825e1 - std::panicking::default_hook::{{closure}}::he2f5e84c6ab77817
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/panicking.rs:295:22
   9:     0x7fcce02822b3 - std::panicking::default_hook::h3f96069db270c68f
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/panicking.rs:314:9
  10:     0x7fcce0aa9de4 - rustc_driver[1ce26eb46f30f4d]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7fcce0282db6 - std::panicking::rust_panic_with_hook::hed0c1597bbc695a6
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/panicking.rs:702:17
  12:     0x7fcce0282c07 - std::panicking::begin_panic_handler::{{closure}}::h0fc9e6b3154da131
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/panicking.rs:588:13
  13:     0x7fcce027fe34 - std::sys_common::backtrace::__rust_end_short_backtrace::hb9c2240a67931ff9
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/sys_common/backtrace.rs:138:18
  14:     0x7fcce0282932 - rust_begin_unwind
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/panicking.rs:584:5
  15:     0x7fcce0246c33 - core::panicking::panic_fmt::h6bda1b0556b509cd
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/core/src/panicking.rs:142:14
  16:     0x7fcce0246b72 - core::panicking::panic_bounds_check::hf8fc252dfbb36006
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/core/src/panicking.rs:84:5
  17:     0x7fcce2ee4643 - rustc_builtin_macros[6a564b3b10d3c327]::format::expand_preparsed_format_args
  18:     0x7fcce2edddac - rustc_builtin_macros[6a564b3b10d3c327]::format::expand_format_args_impl
  19:     0x7fcce281cbed - <rustc_expand[ec7f7165620ca96d]::expand::MacroExpander>::fully_expand_fragment
  20:     0x7fcce339194b - <rustc_expand[ec7f7165620ca96d]::expand::MacroExpander>::expand_crate
  21:     0x7fcce2cb6aa2 - <rustc_session[4ac326324d613686]::session::Session>::time::<core[32c218dbf3427c26]::result::Result<rustc_ast[f9ddef6e3c579104]::ast::Crate, rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>, rustc_interface[694c7ab70a1d38bc]::passes::configure_and_expand::{closure#1}>
  22:     0x7fcce2ca0832 - rustc_interface[694c7ab70a1d38bc]::passes::configure_and_expand
  23:     0x7fcce2cad2c1 - <rustc_interface[694c7ab70a1d38bc]::queries::Queries>::expansion
  24:     0x7fcce2c6bfcc - <rustc_interface[694c7ab70a1d38bc]::interface::Compiler>::enter::<rustc_driver[1ce26eb46f30f4d]::run_compiler::{closure#1}::{closure#2}, core[32c218dbf3427c26]::result::Result<core[32c218dbf3427c26]::option::Option<rustc_interface[694c7ab70a1d38bc]::queries::Linker>, rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>>
  25:     0x7fcce2c681ff - rustc_span[717885ec7c6cd182]::with_source_map::<core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>, rustc_interface[694c7ab70a1d38bc]::interface::create_compiler_and_run<core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>, rustc_driver[1ce26eb46f30f4d]::run_compiler::{closure#1}>::{closure#1}>
  26:     0x7fcce2c844b0 - rustc_interface[694c7ab70a1d38bc]::interface::create_compiler_and_run::<core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>, rustc_driver[1ce26eb46f30f4d]::run_compiler::{closure#1}>
  27:     0x7fcce2c985b2 - <scoped_tls[f235d80db834c386]::ScopedKey<rustc_span[717885ec7c6cd182]::SessionGlobals>>::set::<rustc_interface[694c7ab70a1d38bc]::interface::run_compiler<core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>, rustc_driver[1ce26eb46f30f4d]::run_compiler::{closure#1}>::{closure#0}, core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>>
  28:     0x7fcce2c6a78f - std[167b23ae759531ff]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[694c7ab70a1d38bc]::util::run_in_thread_pool_with_globals<rustc_interface[694c7ab70a1d38bc]::interface::run_compiler<core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>, rustc_driver[1ce26eb46f30f4d]::run_compiler::{closure#1}>::{closure#0}, core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>>::{closure#0}, core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>>
  29:     0x7fcce2c84909 - <<std[167b23ae759531ff]::thread::Builder>::spawn_unchecked_<rustc_interface[694c7ab70a1d38bc]::util::run_in_thread_pool_with_globals<rustc_interface[694c7ab70a1d38bc]::interface::run_compiler<core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>, rustc_driver[1ce26eb46f30f4d]::run_compiler::{closure#1}>::{closure#0}, core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>>::{closure#0}, core[32c218dbf3427c26]::result::Result<(), rustc_errors[3b3e5bcd1e9c2834]::ErrorGuaranteed>>::{closure#1} as core[32c218dbf3427c26]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  30:     0x7fcce028c803 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h86b1834fb0da834b
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/alloc/src/boxed.rs:1934:9
  31:     0x7fcce028c803 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h124d05192aaf60e0
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/alloc/src/boxed.rs:1934:9
  32:     0x7fcce028c803 - std::sys::unix::thread::Thread::new::thread_start::h01e8d05fb6e030ea
                               at /rustc/c2f428d2f3340a0e7d995f4726223db91b93704c/library/std/src/sys/unix/thread.rs:108:17
  33:     0x7fcce01a3609 - start_thread
  34:     0x7fcce00c6133 - clone
  35:                0x0 - <unknown>
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 1.64.0-nightly (c2f428d2f 2022-07-14) running on x86_64-unknown-linux-gnu
note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
end of query stack

[compiler-errors]

Reproduces a bit easier by making a blank cargo project with all of the time crate's features enabled. I'll look into this!

[Cryptex-github]

Reproduces a bit easier by making a blank cargo project with all of the time crate's features enabled. I'll look into this!

Thank you for looking into it this quickly. I really appreciate it!