[INFO] fetching crate sixu 0.4.0...
[INFO] checking sixu-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate sixu 0.4.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate sixu 0.4.0
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate sixu 0.4.0
[INFO] tweaked toml for crates.io crate sixu 0.4.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sixu 0.4.0 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 sixu 0.4.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 8e55b1856590b1aae3deea9604a8fc2f14a3eb261493f79da544b2034348dd80
[INFO] running `Command { std: "docker" "start" "-a" "8e55b1856590b1aae3deea9604a8fc2f14a3eb261493f79da544b2034348dd80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e55b1856590b1aae3deea9604a8fc2f14a3eb261493f79da544b2034348dd80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e55b1856590b1aae3deea9604a8fc2f14a3eb261493f79da544b2034348dd80", kill_on_drop: false }`
[INFO] [stdout] 8e55b1856590b1aae3deea9604a8fc2f14a3eb261493f79da544b2034348dd80
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 53bba4b17176e419aca7f794f08b08c51d3f5a771ef1512fd1e5b11b2b934602
[INFO] running `Command { std: "docker" "start" "-a" "53bba4b17176e419aca7f794f08b08c51d3f5a771ef1512fd1e5b11b2b934602", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]    Compiling serde_json v1.0.141
[INFO] [stderr]    Compiling anyhow v1.0.81
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking arc-swap v1.7.0
[INFO] [stderr]     Checking pollster v0.4.0
[INFO] [stderr]     Checking nom v8.0.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]     Checking nom-language v0.1.0
[INFO] [stderr]     Checking thiserror v2.0.12
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking sixu v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<Vec<std::string::String>, Infallible>
[INFO] [stdout]   --> src/parser/variable.rs:15:73
[INFO] [stdout]    |
[INFO] [stdout] 15 |           |v: Vec<&str>| -> Result<Vec<String>, std::convert::Infallible> {
[INFO] [stdout]    |  _________________________________________________________________________^
[INFO] [stdout] 16 | |             Ok(v.iter().map(|s| s.to_string()).collect())
[INFO] [stdout] 17 | |         },
[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: std::result::Result<Vec<std::string::String>, Infallible>
[INFO] [stdout]   --> src/parser/variable.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |             Ok(v.iter().map(|s| s.to_string()).collect())
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sixu` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<Vec<std::string::String>, Infallible>
[INFO] [stdout]   --> src/parser/variable.rs:15:73
[INFO] [stdout]    |
[INFO] [stdout] 15 |           |v: Vec<&str>| -> Result<Vec<String>, std::convert::Infallible> {
[INFO] [stdout]    |  _________________________________________________________________________^
[INFO] [stdout] 16 | |             Ok(v.iter().map(|s| s.to_string()).collect())
[INFO] [stdout] 17 | |         },
[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: std::result::Result<Vec<std::string::String>, Infallible>
[INFO] [stdout]   --> src/parser/variable.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |             Ok(v.iter().map(|s| s.to_string()).collect())
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sixu` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "53bba4b17176e419aca7f794f08b08c51d3f5a771ef1512fd1e5b11b2b934602", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53bba4b17176e419aca7f794f08b08c51d3f5a771ef1512fd1e5b11b2b934602", kill_on_drop: false }`
[INFO] [stdout] 53bba4b17176e419aca7f794f08b08c51d3f5a771ef1512fd1e5b11b2b934602