[INFO] fetching crate sayegh_bit_parser 0.1.3...
[INFO] checking sayegh_bit_parser-0.1.3 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate sayegh_bit_parser 0.1.3 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate sayegh_bit_parser 0.1.3
[INFO] finished tweaking crates.io crate sayegh_bit_parser 0.1.3
[INFO] tweaked toml for crates.io crate sayegh_bit_parser 0.1.3 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sayegh_bit_parser 0.1.3 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] c44fd9f6844b5252bebe99364cf477285de1db14fd1dd295867b5e32b4d78359
[INFO] running `Command { std: "docker" "start" "-a" "c44fd9f6844b5252bebe99364cf477285de1db14fd1dd295867b5e32b4d78359", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c44fd9f6844b5252bebe99364cf477285de1db14fd1dd295867b5e32b4d78359", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c44fd9f6844b5252bebe99364cf477285de1db14fd1dd295867b5e32b4d78359", kill_on_drop: false }`
[INFO] [stdout] c44fd9f6844b5252bebe99364cf477285de1db14fd1dd295867b5e32b4d78359
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 00092ab897e500cb130585581daf5e48b97a7383eb809d448af690a70e649699
[INFO] running `Command { std: "docker" "start" "-a" "00092ab897e500cb130585581daf5e48b97a7383eb809d448af690a70e649699", kill_on_drop: false }`
[INFO] [stderr]     Checking sayegh_bit_parser v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]    --> src/lib.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |             i+=1;
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]    --> src/lib.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |             i+=1;
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/lib.rs:289:38
[INFO] [stdout]     |
[INFO] [stdout] 289 |         let mut file_name : String = std::env::args().nth(2).unwrap().parse().unwrap();
[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 `sayegh_bit_parser` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "00092ab897e500cb130585581daf5e48b97a7383eb809d448af690a70e649699", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00092ab897e500cb130585581daf5e48b97a7383eb809d448af690a70e649699", kill_on_drop: false }`
[INFO] [stdout] 00092ab897e500cb130585581daf5e48b97a7383eb809d448af690a70e649699
