[INFO] fetching crate diff-man 0.1.7...
[INFO] checking diff-man-0.1.7 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate diff-man 0.1.7 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate diff-man 0.1.7
[INFO] finished tweaking crates.io crate diff-man 0.1.7
[INFO] tweaked toml for crates.io crate diff-man 0.1.7 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate diff-man 0.1.7 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate diff-man 0.1.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3935dee8c7ca91a827dab9dc48835746f00ffdfc325dc402e4df14a2132650d7
[INFO] running `Command { std: "docker" "start" "-a" "3935dee8c7ca91a827dab9dc48835746f00ffdfc325dc402e4df14a2132650d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3935dee8c7ca91a827dab9dc48835746f00ffdfc325dc402e4df14a2132650d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3935dee8c7ca91a827dab9dc48835746f00ffdfc325dc402e4df14a2132650d7", kill_on_drop: false }`
[INFO] [stdout] 3935dee8c7ca91a827dab9dc48835746f00ffdfc325dc402e4df14a2132650d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3301b6ff323c68fbe3ce02acec1ddfa0a0e3406d1a921b948e29ed7790e49203
[INFO] running `Command { std: "docker" "start" "-a" "3301b6ff323c68fbe3ce02acec1ddfa0a0e3406d1a921b948e29ed7790e49203", kill_on_drop: false }`
[INFO] [stderr]     Checking clap_lex v0.7.3
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]     Checking clap_builder v4.5.21
[INFO] [stderr]    Compiling clap_derive v4.5.18
[INFO] [stderr]     Checking clap v4.5.21
[INFO] [stderr]     Checking diff-man v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `core::panic`
[INFO] [stdout]    --> src/diff.rs:283:10
[INFO] [stdout]     |
[INFO] [stdout] 283 |     use {core::panic, std::fs};
[INFO] [stdout]     |          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `reason` are never read
[INFO] [stdout]    --> src/diff.rs:126:5
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub struct DiffError {
[INFO] [stdout]     |            --------- fields in this struct
[INFO] [stdout] 126 |     kind: DiffErrorKind,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 127 |     reason: String,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DiffError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind`, `reason`, and `line` are never read
[INFO] [stdout]   --> src/parser.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct ParseError {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 20 |     kind: ParseErrorKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 21 |     reason: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 22 |     line: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::path::PathBuf, Infallible>
[INFO] [stdout]    --> src/diff.rs:406:25
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let comp_root = PathBuf::from_str("test_data/composition").unwrap();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::path::PathBuf, Infallible>
[INFO] [stdout]    --> src/diff.rs:424:25
[INFO] [stdout]     |
[INFO] [stdout] 424 |         let comp_root = PathBuf::from_str("test_data/composition").unwrap();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/diff.rs:425:9
[INFO] [stdout]     |
[INFO] [stdout] 425 |         com.revert(&comp_root);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 425 |         let _ = com.revert(&comp_root);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::path::PathBuf, Infallible>
[INFO] [stdout]    --> src/diff.rs:445:25
[INFO] [stdout]     |
[INFO] [stdout] 445 |         let comp_root = PathBuf::from_str("test_data/composition").unwrap();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/diff.rs:446:9
[INFO] [stdout]     |
[INFO] [stdout] 446 |         com.apply(&comp_root);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 446 |         let _ = com.apply(&comp_root);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::path::PathBuf, Infallible>
[INFO] [stdout]    --> src/diff.rs:463:25
[INFO] [stdout]     |
[INFO] [stdout] 463 |         let comp_root = PathBuf::from_str("test_data/composition").unwrap();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/diff.rs:464:9
[INFO] [stdout]     |
[INFO] [stdout] 464 |         com.revert(&comp_root);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 464 |         let _ = com.revert(&comp_root);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::path::PathBuf, Infallible>
[INFO] [stdout]    --> src/parser.rs:244:32
[INFO] [stdout]     |
[INFO] [stdout] 244 |                     let path = PathBuf::from_str(file_path_a).map_err(|e| {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `short_test_data` should have an upper case name
[INFO] [stdout]    --> src/parser.rs:521:11
[INFO] [stdout]     |
[INFO] [stdout] 521 |     const short_test_data: &str = r#"diff --git a/tests/vm.rs b/tests/vm.rs
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] help: convert the identifier to upper case
[INFO] [stdout]     |
[INFO] [stdout] 521 -     const short_test_data: &str = r#"diff --git a/tests/vm.rs b/tests/vm.rs
[INFO] [stdout] 521 +     const SHORT_TEST_DATA: &str = r#"diff --git a/tests/vm.rs b/tests/vm.rs
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `diff-man` (lib test) due to 5 previous errors; 7 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: fields `kind` and `reason` are never read
[INFO] [stdout]    --> src/diff.rs:126:5
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub struct DiffError {
[INFO] [stdout]     |            --------- fields in this struct
[INFO] [stdout] 126 |     kind: DiffErrorKind,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 127 |     reason: String,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DiffError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind`, `reason`, and `line` are never read
[INFO] [stdout]   --> src/parser.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct ParseError {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 20 |     kind: ParseErrorKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 21 |     reason: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 22 |     line: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/parser.rs:244:32
[INFO] [stdout]     |
[INFO] [stdout] 244 |                     let path = PathBuf::from_str(file_path_a).map_err(|e| {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `diff-man` (lib) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "3301b6ff323c68fbe3ce02acec1ddfa0a0e3406d1a921b948e29ed7790e49203", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3301b6ff323c68fbe3ce02acec1ddfa0a0e3406d1a921b948e29ed7790e49203", kill_on_drop: false }`
[INFO] [stdout] 3301b6ff323c68fbe3ce02acec1ddfa0a0e3406d1a921b948e29ed7790e49203