Closed
Description
Problem
Cargo (nightly) panics when I use -Z rustdoc-scrape-examples=examples, but only on proc-macro crates as it seems. This issue first appeared after rust-lang/rust#94926 was fixed.
The panic occurs here: https://github.com/rust-lang/cargo/blob/master/src/cargo/ops/cargo_compile.rs#L1600
Steps
- Clone Relm4
- Create docs for
relm4-macrosusingcargo +nightly doc -Z rustdoc-scrape-examples=examples -p relm4-macros
This will likely work with any proc-macro crate though, as it does not even start to compile anything before cargo panics.
Possible Solution(s)
No response
Notes
Backtrace
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', src/tools/cargo/src/cargo/ops/cargo_compile.rs:1600:36
stack backtrace:
0: rust_begin_unwind
at /rustc/e7575f9670f3c837def3d186ae09366c75c7632e/library/std/src/panicking.rs:584:5
1: core::panicking::panic_fmt
at /rustc/e7575f9670f3c837def3d186ae09366c75c7632e/library/core/src/panicking.rs:142:14
2: core::panicking::panic
at /rustc/e7575f9670f3c837def3d186ae09366c75c7632e/library/core/src/panicking.rs:48:5
3: <core::iter::adapters::map::Map<core::slice::iter::Iter<cargo::core::compiler::unit::Unit>, cargo::ops::cargo_compile::rebuild_unit_graph_shared::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<cargo::core::compiler::unit::Unit, <alloc::vec::Vec<cargo::core::compiler::unit::Unit> as alloc::vec::spec_extend::SpecExtend<cargo::core::compiler::unit::Unit, core::iter::adapters::map::Map<core::slice::iter::Iter<cargo::core::compiler::unit::Unit>, cargo::ops::cargo_compile::rebuild_unit_graph_shared::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}>
4: cargo::ops::cargo_compile::rebuild_unit_graph_shared
5: cargo::ops::cargo_compile::create_bcx
6: cargo::ops::cargo_compile::compile_ws
7: cargo::ops::cargo_compile::compile
8: cargo::ops::cargo_doc::doc
9: cargo::commands::doc::exec
10: cargo::cli::main
11: cargo::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
Version
cargo 1.62.0-nightly (dba5baf 2022-04-13)
release: 1.62.0-nightly
commit-hash: dba5baf4345858c591517b24801902a062c399f8
commit-date: 2022-04-13
host: x86_64-unknown-linux-gnu
libgit2: 1.4.2 (sys:0.14.2 vendored)
libcurl: 7.80.0-DEV (sys:0.4.51+curl-7.80.0 vendored ssl:OpenSSL/1.1.1m)
os: OracleLinux 35.0.0 [64-bit]