[INFO] fetching crate switcher 0.0.8-alpha...
[INFO] testing switcher-0.0.8-alpha against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2
[INFO] extracting crate switcher 0.0.8-alpha into /workspace/builds/worker-4-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-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate switcher 0.0.8-alpha on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded getrandom v0.2.3
[INFO] [stderr]   Downloaded serde_json v1.0.73
[INFO] [stderr]   Downloaded colored v2.0.0
[INFO] [stderr]   Downloaded serde_derive v1.0.132
[INFO] [stderr]   Downloaded proc-macro2 v1.0.34
[INFO] [stderr]   Downloaded dirs-sys v0.3.6
[INFO] [stderr]   Downloaded serde v1.0.132
[INFO] [stderr]   Downloaded libc v0.2.112
[INFO] [stderr]   Downloaded syn v1.0.82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 423cb3f8d8e0ab7a2ccd9e6f047c667e851a3c5cf67c2fefa2ff8d9290f4f7e1
[INFO] running `Command { std: "docker" "start" "-a" "423cb3f8d8e0ab7a2ccd9e6f047c667e851a3c5cf67c2fefa2ff8d9290f4f7e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "423cb3f8d8e0ab7a2ccd9e6f047c667e851a3c5cf67c2fefa2ff8d9290f4f7e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "423cb3f8d8e0ab7a2ccd9e6f047c667e851a3c5cf67c2fefa2ff8d9290f4f7e1", kill_on_drop: false }`
[INFO] [stdout] 423cb3f8d8e0ab7a2ccd9e6f047c667e851a3c5cf67c2fefa2ff8d9290f4f7e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 176fbb012b7b20e845a0fbe2951f7fd4b514cba2243e1a40dee04ecaf98dac49
[INFO] running `Command { std: "docker" "start" "-a" "176fbb012b7b20e845a0fbe2951f7fd4b514cba2243e1a40dee04ecaf98dac49", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[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 itoa v1.0.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling dirs-sys v0.3.6
[INFO] [stderr]    Compiling atty v0.2.14
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.43s
[INFO] running `Command { std: "docker" "inspect" "176fbb012b7b20e845a0fbe2951f7fd4b514cba2243e1a40dee04ecaf98dac49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "176fbb012b7b20e845a0fbe2951f7fd4b514cba2243e1a40dee04ecaf98dac49", kill_on_drop: false }`
[INFO] [stdout] 176fbb012b7b20e845a0fbe2951f7fd4b514cba2243e1a40dee04ecaf98dac49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 174d69078bb542e494f7929fed18c7e7cf9a85f04959de737e2a466fc8d987c8
[INFO] running `Command { std: "docker" "start" "-a" "174d69078bb542e494f7929fed18c7e7cf9a85f04959de737e2a466fc8d987c8", 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "174d69078bb542e494f7929fed18c7e7cf9a85f04959de737e2a466fc8d987c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "174d69078bb542e494f7929fed18c7e7cf9a85f04959de737e2a466fc8d987c8", kill_on_drop: false }`
[INFO] [stdout] 174d69078bb542e494f7929fed18c7e7cf9a85f04959de737e2a466fc8d987c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e69a4a86d923013e9561ca093b096108b7f29ea7296d92a737df7d532457883a
[INFO] running `Command { std: "docker" "start" "-a" "e69a4a86d923013e9561ca093b096108b7f29ea7296d92a737df7d532457883a", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stdout] 
[INFO] [stderr]    --> src/commands/projects.rs:154:9
[INFO] [stdout] running 0 tests
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr] 154 |     let mut project = match config.get_project(&project_name) {
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `switcher` (bin "switcher" test) generated 1 warning (run `cargo fix --bin "switcher" -p 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-7482a701c7ddf581)
[INFO] running `Command { std: "docker" "inspect" "e69a4a86d923013e9561ca093b096108b7f29ea7296d92a737df7d532457883a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e69a4a86d923013e9561ca093b096108b7f29ea7296d92a737df7d532457883a", kill_on_drop: false }`
[INFO] [stdout] e69a4a86d923013e9561ca093b096108b7f29ea7296d92a737df7d532457883a