[INFO] fetching crate switcher 0.0.8-alpha...
[INFO] testing switcher-0.0.8-alpha against 1.90.0 for beta-1.91-3
[INFO] extracting crate switcher 0.0.8-alpha into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate switcher 0.0.8-alpha
[INFO] finished tweaking crates.io crate switcher 0.0.8-alpha
[INFO] tweaked toml for crates.io crate switcher 0.0.8-alpha written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate switcher 0.0.8-alpha on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate switcher 0.0.8-alpha 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.132
[INFO] [stderr]   Downloaded ryu v1.0.9
[INFO] [stderr]   Downloaded itoa v1.0.1
[INFO] [stderr]   Downloaded unicode-xid v0.2.2
[INFO] [stderr]   Downloaded redox_users v0.4.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.34
[INFO] [stderr]   Downloaded colored v2.0.0
[INFO] [stderr]   Downloaded wasi v0.10.2+wasi-snapshot-preview1
[INFO] [stderr]   Downloaded redox_syscall v0.2.10
[INFO] [stderr]   Downloaded serde v1.0.132
[INFO] [stderr]   Downloaded dirs-sys v0.3.6
[INFO] [stderr]   Downloaded syn v1.0.82
[INFO] [stderr]   Downloaded serde_json v1.0.73
[INFO] [stderr]   Downloaded dirs v4.0.0
[INFO] [stderr]   Downloaded getrandom v0.2.3
[INFO] [stderr]   Downloaded quote v1.0.10
[INFO] [stderr]   Downloaded libc v0.2.112
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e348b99be7fdf4a608f51e02230f9e6ee14cf92970b51b5980b46f3697babcdd
[INFO] running `Command { std: "docker" "start" "-a" "e348b99be7fdf4a608f51e02230f9e6ee14cf92970b51b5980b46f3697babcdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e348b99be7fdf4a608f51e02230f9e6ee14cf92970b51b5980b46f3697babcdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e348b99be7fdf4a608f51e02230f9e6ee14cf92970b51b5980b46f3697babcdd", kill_on_drop: false }`
[INFO] [stdout] e348b99be7fdf4a608f51e02230f9e6ee14cf92970b51b5980b46f3697babcdd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42a3ec3b780219a43fd02bf148315e2522f005648984c452dddb0338dbda0f45
[INFO] running `Command { std: "docker" "start" "-a" "42a3ec3b780219a43fd02bf148315e2522f005648984c452dddb0338dbda0f45", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling serde_derive v1.0.132
[INFO] [stderr]    Compiling serde v1.0.132
[INFO] [stderr]    Compiling serde_json v1.0.73
[INFO] [stderr]    Compiling ryu v1.0.9
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs-sys v0.3.6
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling dirs v4.0.0
[INFO] [stderr]    Compiling switcher v0.0.8-alpha (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/commands/projects.rs:154:9
[INFO] [stdout]     |
[INFO] [stdout] 154 |     let mut project = match config.get_project(&project_name) {
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.14s
[INFO] running `Command { std: "docker" "inspect" "42a3ec3b780219a43fd02bf148315e2522f005648984c452dddb0338dbda0f45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42a3ec3b780219a43fd02bf148315e2522f005648984c452dddb0338dbda0f45", kill_on_drop: false }`
[INFO] [stdout] 42a3ec3b780219a43fd02bf148315e2522f005648984c452dddb0338dbda0f45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92329a897bfedcd21b69dc5e78bc51f7ca9413e3adcae2fe5820606bd70a8b0a
[INFO] running `Command { std: "docker" "start" "-a" "92329a897bfedcd21b69dc5e78bc51f7ca9413e3adcae2fe5820606bd70a8b0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling switcher v0.0.8-alpha (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/commands/projects.rs:154:9
[INFO] [stdout]     |
[INFO] [stdout] 154 |     let mut project = match config.get_project(&project_name) {
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "92329a897bfedcd21b69dc5e78bc51f7ca9413e3adcae2fe5820606bd70a8b0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92329a897bfedcd21b69dc5e78bc51f7ca9413e3adcae2fe5820606bd70a8b0a", kill_on_drop: false }`
[INFO] [stdout] 92329a897bfedcd21b69dc5e78bc51f7ca9413e3adcae2fe5820606bd70a8b0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9e9c212d2e745cc9e8672bb56aa6743b2ba2df552bdec5a4cb6620328dd20e0d
[INFO] running `Command { std: "docker" "start" "-a" "9e9c212d2e745cc9e8672bb56aa6743b2ba2df552bdec5a4cb6620328dd20e0d", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/commands/projects.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 |     let mut project = match config.get_project(&project_name) {
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `switcher` (bin "switcher" test) generated 1 warning (run `cargo fix --bin "switcher" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/switcher-b985b87a2ae3667b)
[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" "9e9c212d2e745cc9e8672bb56aa6743b2ba2df552bdec5a4cb6620328dd20e0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e9c212d2e745cc9e8672bb56aa6743b2ba2df552bdec5a4cb6620328dd20e0d", kill_on_drop: false }`
[INFO] [stdout] 9e9c212d2e745cc9e8672bb56aa6743b2ba2df552bdec5a4cb6620328dd20e0d