[INFO] fetching crate solve_string 0.1.1...
[INFO] building solve_string-0.1.1 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate solve_string 0.1.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate solve_string 0.1.1
[INFO] finished tweaking crates.io crate solve_string 0.1.1
[INFO] tweaked toml for crates.io crate solve_string 0.1.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate solve_string 0.1.1 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 882aaef16c1dbc616581a2d82d8daa5b00cb2147611cd91b04691dbdf08945da
[INFO] running `Command { std: "docker" "start" "-a" "882aaef16c1dbc616581a2d82d8daa5b00cb2147611cd91b04691dbdf08945da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "882aaef16c1dbc616581a2d82d8daa5b00cb2147611cd91b04691dbdf08945da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "882aaef16c1dbc616581a2d82d8daa5b00cb2147611cd91b04691dbdf08945da", kill_on_drop: false }`
[INFO] [stdout] 882aaef16c1dbc616581a2d82d8daa5b00cb2147611cd91b04691dbdf08945da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aca18531360dd65541d10af7553b8339fc0a11aabe6076fec8f3312ba30ca9e8
[INFO] running `Command { std: "docker" "start" "-a" "aca18531360dd65541d10af7553b8339fc0a11aabe6076fec8f3312ba30ca9e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling solve_string v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `before_letter` is never read
[INFO] [stdout]   --> src/lib.rs:11:17
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut before_letter= "l";
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "aca18531360dd65541d10af7553b8339fc0a11aabe6076fec8f3312ba30ca9e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aca18531360dd65541d10af7553b8339fc0a11aabe6076fec8f3312ba30ca9e8", kill_on_drop: false }`
[INFO] [stdout] aca18531360dd65541d10af7553b8339fc0a11aabe6076fec8f3312ba30ca9e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ba41ce963a9c6d55cb2dcbbe4a1b4cf03e95c63452f094833ba1cf5679d414a
[INFO] running `Command { std: "docker" "start" "-a" "4ba41ce963a9c6d55cb2dcbbe4a1b4cf03e95c63452f094833ba1cf5679d414a", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `before_letter` is never read
[INFO] [stdout]   --> src/lib.rs:11:17
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut before_letter= "l";
[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] [stderr]    Compiling solve_string v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `before_letter` is never read
[INFO] [stdout]   --> src/lib.rs:11:17
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut before_letter= "l";
[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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "4ba41ce963a9c6d55cb2dcbbe4a1b4cf03e95c63452f094833ba1cf5679d414a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ba41ce963a9c6d55cb2dcbbe4a1b4cf03e95c63452f094833ba1cf5679d414a", kill_on_drop: false }`
[INFO] [stdout] 4ba41ce963a9c6d55cb2dcbbe4a1b4cf03e95c63452f094833ba1cf5679d414a