Open
Description
Problem
After cargo fix emits warnings, subsequent cargo check commands with the same arguments will not emit an error despite existence of -D flag, until the build cache is cleared.
Steps
user@31c2faa23618:/unfixable$ cargo init && cargo update
Created binary (application) package
user@31c2faa23618:/unfixable$ cat > src/main.rs
fn main() {
'unused: loop {}
}user@31c2faa23618:/unfixable$ git add -A && git commit -m initial
[master (root-commit) 339f77e] initial
4 files changed, 54 insertions(+)
create mode 100644 .gitignore
create mode 100644 Cargo.lock
create mode 100644 Cargo.toml
create mode 100644 src/main.rs
user@31c2faa23618:/unfixable$ RUSTFLAGS="-D unused_labels" cargo check
Checking unfixable v0.1.0 (/unfixable)
error: unused label
--> src/main.rs:2:5
|
2 | 'unused: loop {}
| ^^^^^^^
|
= note: requested on the command line with `-D unused-labels`
error: could not compile `unfixable` (bin "unfixable") due to 1 previous error
user@31c2faa23618:/unfixable$ RUSTFLAGS="-D unused_labels" cargo fix
Checking unfixable v0.1.0 (/unfixable)
warning: unused label
--> src/main.rs:2:5
|
2 | 'unused: loop {}
| ^^^^^^^
|
= note: requested on the command line with `-D unused-labels`
warning: `unfixable` (bin "unfixable" test) generated 1 warning
warning: `unfixable` (bin "unfixable") generated 1 warning (1 duplicate)
Finished dev [unoptimized + debuginfo] target(s) in 0.09s
user@31c2faa23618:/unfixable$ RUSTFLAGS="-D unused_labels" cargo check
warning: unused label
--> src/main.rs:2:5
|
2 | 'unused: loop {}
| ^^^^^^^
|
= note: requested on the command line with `-D unused-labels`
warning: `unfixable` (bin "unfixable") generated 1 warning
Finished dev [unoptimized + debuginfo] target(s) in 0.00s
Possible Solution(s)
No response
Notes
This looks like it's caused by forced demotion of errors into warnings in fix mode, which pollutes the result cache for cargo check.
Version
cargo 1.77.0-nightly (ac6bbb332 2023-12-26)
release: 1.77.0-nightly
commit-hash: ac6bbb33293d8d424c17ecdb42af3aac25fb7295
commit-date: 2023-12-26
host: x86_64-unknown-linux-gnu
libgit2: 1.7.1 (sys:0.18.1 vendored)
libcurl: 8.5.0-DEV (sys:0.4.70+curl-8.5.0 vendored ssl:OpenSSL/1.1.1w)
ssl: OpenSSL 1.1.1w 11 Sep 2023
os: Debian 11.0.0 [64-bit]
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