[rustdoc] scrap example ICE #147399
Description
Crate name
teleop
Build failure link
https://docs.rs/crate/teleop/0.1.1/builds
Additional details
The docs build of 0.1.1 failed in the same way 3 times in a row.
The docs build of 0.1.2 didn't, although almost nothing fundamentally changed.
It's likely a compiler bug, but I was not able to reproduce it on my machine with the same toolchain.
[INFO] [stderr] thread 'rustc' (43) panicked at compiler/rustc_span/src/lib.rs:2258:17:
[INFO] [stderr] assertion failed: bpos.to_u32() >= mbc.pos.to_u32() + mbc.bytes as u32
[INFO] [stderr] stack backtrace:
[INFO] [stderr] 0: 0x7f9c8b5c64f3 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h99fd4ee990ea92eb
[INFO] [stderr] 1: 0x7f9c8bc0203c - core::fmt::write::hd54d8fac48e5e0c7
[INFO] [stderr] 2: 0x7f9c8b57aef3 - std::io::Write::write_fmt::h132f1ec6e4d6f07f
[INFO] [stderr] 3: 0x7f9c8b58c4b2 - std::sys::backtrace::BacktraceLock::print::h0e63be903a6e5637
[INFO] [stderr] 4: 0x7f9c8b592529 - std::panicking::default_hook::{{closure}}::h9369a99bf301bd3a
[INFO] [stderr] 5: 0x7f9c8b592053 - std::panicking::default_hook::h0aaa87a45572dea3
[INFO] [stderr] 6: 0x7f9c8a5aa037 - std[5c68ab07f69f8a7d]::panicking::update_hook::<alloc[55012e4bf404161]::boxed::Box<rustc_driver_impl[6ea9bcf097ce93c7]::install_ice_hook::{closure#1}>>::{closure#0}
[INFO] [stderr] 7: 0x7f9c8b59294f - std::panicking::panic_with_hook::h14e8fb556baa8187
[INFO] [stderr] 8: 0x7f9c8b5926d6 - std::panicking::panic_handler::{{closure}}::h7d6ed8b40f109538
[INFO] [stderr] 9: 0x7f9c8b58c5f9 - std::sys::backtrace::__rust_end_short_backtrace::h45d723046ddf8c66
[INFO] [stderr] 10: 0x7f9c8b56d12d - __rustc[211aff6feab39c7b]::rust_begin_unwind
[INFO] [stderr] 11: 0x7f9c88608840 - core::panicking::panic_fmt::ha924964e43d05b79
[INFO] [stderr] 12: 0x7f9c880a0a1c - core::panicking::panic::h283e0b473064e9c6
[INFO] [stderr] 13: 0x7f9c8be887d4 - <rustc_span[6efd151d4abae7e5]::source_map::SourceMap>::lookup_char_pos
[INFO] [stderr] 14: 0x558f68625437 - <rustdoc[b18494121a05a9a8]::clean::types::Span>::cnum
[INFO] [stderr] 15: 0x558f685a47e9 - <rustdoc[b18494121a05a9a8]::html::render::context::Context>::href_from_span
[INFO] [stderr] 16: 0x558f6872f0f7 - <&core[a7dd1520c7581f42]::fmt::builders::FromFn<rustdoc[b18494121a05a9a8]::html::sources::print_src<&mut core[a7dd1520c7581f42]::fmt::Formatter>::{closure#0}> as core[a7dd1520c7581f42]::fmt::Display>::fmt
[INFO] [stderr] 17: 0x7f9c8bc0203c - core::fmt::write::hd54d8fac48e5e0c7
[INFO] [stderr] 18: 0x558f6872f83b - <&askama[30b2a191ef6ba8ff]::filters::escape::Safe<&core[a7dd1520c7581f42]::fmt::builders::FromFn<rustdoc[b18494121a05a9a8]::html::sources::print_src<&mut core[a7dd1520c7581f42]::fmt::Formatter>::{closure#0}>> as core[a7dd1520c7581f42]::fmt::Display>::fmt
[INFO] [stderr] 19: 0x7f9c8bc0203c - core::fmt::write::hd54d8fac48e5e0c7
[INFO] [stderr] 20: 0x558f6852b733 - rustdoc[b18494121a05a9a8]::html::render::render_call_locations::<&mut core[a7dd1520c7581f42]::fmt::Formatter>::{closure#2}
[INFO] [stderr] 21: 0x558f68762e48 - <core[a7dd1520c7581f42]::fmt::builders::FromFn<rustdoc[b18494121a05a9a8]::html::render::document_full_inner::{closure#0}> as core[a7dd1520c7581f42]::fmt::Display>::fmt
[INFO] [stderr] 22: 0x7f9c8bc0203c - core::fmt::write::hd54d8fac48e5e0c7
[INFO] [stderr] 23: 0x558f68763d0a - <core[a7dd1520c7581f42]::fmt::builders::FromFn<rustdoc[b18494121a05a9a8]::html::render::document::{closure#0}> as core[a7dd1520c7581f42]::fmt::Display>::fmt
[INFO] [stderr] 24: 0x7f9c8bc0203c - core::fmt::write::hd54d8fac48e5e0c7
[INFO] [stderr] 25: 0x558f687687e8 - <core[a7dd1520c7581f42]::fmt::builders::FromFn<rustdoc[b18494121a05a9a8]::html::render::print_item::item_function::{closure#0}> as core[a7dd1520c7581f42]::fmt::Display>::fmt
[INFO] [stderr] 26: 0x7f9c8bc0203c - core::fmt::write::hd54d8fac48e5e0c7
[INFO] [stderr] 27: 0x558f68467a8d - rustdoc[b18494121a05a9a8]::html::layout::render::<core[a7dd1520c7581f42]::fmt::builders::FromFn<rustdoc[b18494121a05a9a8]::html::render::print_item::print_item::{closure#0}>, core[a7dd1520c7581f42]::fmt::builders::FromFn<<rustdoc[b18494121a05a9a8]::html::render::context::Context>::render_item::{closure#0}>>
[INFO] [stderr] 28: 0x558f685a3e82 - <rustdoc[b18494121a05a9a8]::html::render::context::Context>::render_item
[INFO] [stderr] 29: 0x558f68749f9e - <rustdoc[b18494121a05a9a8]::html::render::context::Context as rustdoc[b18494121a05a9a8]::formats::renderer::FormatRenderer>::item
[INFO] [stderr] 30: 0x558f684753b5 - rustdoc[b18494121a05a9a8]::formats::renderer::run_format_inner::<rustdoc[b18494121a05a9a8]::html::render::context::Context>
[INFO] [stderr] 31: 0x558f68475566 - rustdoc[b18494121a05a9a8]::formats::renderer::run_format_inner::<rustdoc[b18494121a05a9a8]::html::render::context::Context>
[INFO] [stderr] 32: 0x558f68475566 - rustdoc[b18494121a05a9a8]::formats::renderer::run_format_inner::<rustdoc[b18494121a05a9a8]::html::render::context::Context>
[INFO] [stderr] 33: 0x558f68475566 - rustdoc[b18494121a05a9a8]::formats::renderer::run_format_inner::<rustdoc[b18494121a05a9a8]::html::render::context::Context>
[INFO] [stderr] 34: 0x558f685331bf - rustdoc[b18494121a05a9a8]::main_args::{closure#2}::{closure#0}
[INFO] [stderr] 35: 0x558f68525da3 - rustc_interface[3738b0f3f300858a]::interface::run_compiler::<(), rustdoc[b18494121a05a9a8]::main_args::{closure#2}>::{closure#1}
[INFO] [stderr] 36: 0x558f6845feb8 - std[5c68ab07f69f8a7d]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[3738b0f3f300858a]::util::run_in_thread_with_globals<rustc_interface[3738b0f3f300858a]::util::run_in_thread_pool_with_globals<rustc_interface[3738b0f3f300858a]::interface::run_compiler<(), rustdoc[b18494121a05a9a8]::main_args::{closure#2}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
[INFO] [stderr] 37: 0x558f6855923d - <<std[5c68ab07f69f8a7d]::thread::Builder>::spawn_unchecked_<rustc_interface[3738b0f3f300858a]::util::run_in_thread_with_globals<rustc_interface[3738b0f3f300858a]::util::run_in_thread_pool_with_globals<rustc_interface[3738b0f3f300858a]::interface::run_compiler<(), rustdoc[b18494121a05a9a8]::main_args::{closure#2}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[a7dd1520c7581f42]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stderr] 38: 0x7f9c8cd063cd - std::sys::thread::unix::Thread::new::thread_start::he0f9630b71090652
[INFO] [stderr] 39: 0x7f9c8688aaa4 - <unknown>
[INFO] [stderr] 40: 0x7f9c86917a34 - clone
[INFO] [stderr] 41: 0x0 - <unknown>
[INFO] [stderr]
[INFO] [stderr] error: the compiler unexpectedly panicked. this is a bug.
[INFO] [stderr]
[INFO] [stderr] note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-rustdoc&template=ice.md
[INFO] [stderr]
[INFO] [stderr] note: please make sure that you have updated to the latest nightly
[INFO] [stderr]
[INFO] [stderr] warning: the ICE couldn't be written to `/opt/rustwide/workdir/rustc-ice-2025-10-04T18_01_32-42.txt`: Read-only file system (os error 30)
[INFO] [stderr]
[INFO] [stderr] note: rustc 1.92.0-nightly (595b9a498 2025-10-03) running on x86_64-unknown-linux-gnu
[INFO] [stderr]
[INFO] [stderr] note: compiler flags: --crate-type lib -Z unstable-options -Z unstable-options -Z unstable-options
[INFO] [stderr]
[INFO] [stderr] note: some of the compiler flags provided by cargo are hidden