[INFO] fetching crate repl_lib 0.2.1...
[INFO] testing repl_lib-0.2.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate repl_lib 0.2.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate repl_lib 0.2.1
[INFO] finished tweaking crates.io crate repl_lib 0.2.1
[INFO] tweaked toml for crates.io crate repl_lib 0.2.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate repl_lib 0.2.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate repl_lib 0.2.1 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52f52070faa0c46d856fc95c6184cd9b30a1cd968cd43d162994da1ffb52afa9
[INFO] running `Command { std: "docker" "start" "-a" "52f52070faa0c46d856fc95c6184cd9b30a1cd968cd43d162994da1ffb52afa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52f52070faa0c46d856fc95c6184cd9b30a1cd968cd43d162994da1ffb52afa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52f52070faa0c46d856fc95c6184cd9b30a1cd968cd43d162994da1ffb52afa9", kill_on_drop: false }`
[INFO] [stdout] 52f52070faa0c46d856fc95c6184cd9b30a1cd968cd43d162994da1ffb52afa9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40f0b62b58806abeff28aa287768b67c6be7168182eb26a1635b96a3bc9edfa6
[INFO] running `Command { std: "docker" "start" "-a" "40f0b62b58806abeff28aa287768b67c6be7168182eb26a1635b96a3bc9edfa6", kill_on_drop: false }`
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]    Compiling term_manager v0.1.3
[INFO] [stderr]    Compiling repl_lib v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `output` is never read
[INFO] [stdout]    --> src/lib.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let mut output: Option<String> = None;
[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 0.63s
[INFO] running `Command { std: "docker" "inspect" "40f0b62b58806abeff28aa287768b67c6be7168182eb26a1635b96a3bc9edfa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40f0b62b58806abeff28aa287768b67c6be7168182eb26a1635b96a3bc9edfa6", kill_on_drop: false }`
[INFO] [stdout] 40f0b62b58806abeff28aa287768b67c6be7168182eb26a1635b96a3bc9edfa6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6606627b17c70975f6a14c7406862a640d6bef3e5c7b61f6fb134be64516166f
[INFO] running `Command { std: "docker" "start" "-a" "6606627b17c70975f6a14c7406862a640d6bef3e5c7b61f6fb134be64516166f", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `output` is never read
[INFO] [stdout]    --> src/lib.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let mut output: Option<String> = None;
[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 repl_lib v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `output` is never read
[INFO] [stdout]    --> src/lib.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let mut output: Option<String> = None;
[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 0.18s
[INFO] running `Command { std: "docker" "inspect" "6606627b17c70975f6a14c7406862a640d6bef3e5c7b61f6fb134be64516166f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6606627b17c70975f6a14c7406862a640d6bef3e5c7b61f6fb134be64516166f", kill_on_drop: false }`
[INFO] [stdout] 6606627b17c70975f6a14c7406862a640d6bef3e5c7b61f6fb134be64516166f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] aeb6f6fce9e6eaebc1323a025ebf422ae0db949f1f7d78f0a3c2968a96651bb8
[INFO] running `Command { std: "docker" "start" "-a" "aeb6f6fce9e6eaebc1323a025ebf422ae0db949f1f7d78f0a3c2968a96651bb8", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `output` is never read
[INFO] [stderr]    --> src/lib.rs:187:17
[INFO] [stderr]     |
[INFO] [stderr] 187 |         let mut output: Option<String> = None;
[INFO] [stderr]     |                 ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `repl_lib` (lib) generated 1 warning
[INFO] [stderr] warning: `repl_lib` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/repl_lib-e31619519afd00f3)
[INFO] [stderr]    Doc-tests repl_lib
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "aeb6f6fce9e6eaebc1323a025ebf422ae0db949f1f7d78f0a3c2968a96651bb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aeb6f6fce9e6eaebc1323a025ebf422ae0db949f1f7d78f0a3c2968a96651bb8", kill_on_drop: false }`
[INFO] [stdout] aeb6f6fce9e6eaebc1323a025ebf422ae0db949f1f7d78f0a3c2968a96651bb8