[INFO] cloning repository https://github.com/Zooce/toy_payments_engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Zooce/toy_payments_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZooce%2Ftoy_payments_engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZooce%2Ftoy_payments_engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0167e05db2ffea91e72cd2b8abf5c7d8b210c6dd
[INFO] checking Zooce/toy_payments_engine against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZooce%2Ftoy_payments_engine" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Zooce/toy_payments_engine on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Zooce/toy_payments_engine
[INFO] finished tweaking git repo https://github.com/Zooce/toy_payments_engine
[INFO] tweaked toml for git repo https://github.com/Zooce/toy_payments_engine written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Zooce/toy_payments_engine 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9adafaef1156db2ae3073931f6b423ae34fc720fc991d3722eb796cd2cdd87be
[INFO] running `Command { std: "docker" "start" "-a" "9adafaef1156db2ae3073931f6b423ae34fc720fc991d3722eb796cd2cdd87be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9adafaef1156db2ae3073931f6b423ae34fc720fc991d3722eb796cd2cdd87be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9adafaef1156db2ae3073931f6b423ae34fc720fc991d3722eb796cd2cdd87be", kill_on_drop: false }`
[INFO] [stdout] 9adafaef1156db2ae3073931f6b423ae34fc720fc991d3722eb796cd2cdd87be
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0315e0fb1975ab1218e5b5a523a8d88eb4b965da4d578fc5559af3b6622ea7fe
[INFO] running `Command { std: "docker" "start" "-a" "0315e0fb1975ab1218e5b5a523a8d88eb4b965da4d578fc5559af3b6622ea7fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling serde_derive v1.0.144
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]     Checking ryu v1.0.11
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking toy_payments_engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine.rs:84:26
[INFO] [stdout]    |
[INFO] [stdout] 84 |         else if let Some(mut t) = self.tx_map.get_mut(&tx.tx_id) {
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine.rs:84:26
[INFO] [stdout]    |
[INFO] [stdout] 84 |         else if let Some(mut t) = self.tx_map.get_mut(&tx.tx_id) {
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.97s
[INFO] running `Command { std: "docker" "inspect" "0315e0fb1975ab1218e5b5a523a8d88eb4b965da4d578fc5559af3b6622ea7fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0315e0fb1975ab1218e5b5a523a8d88eb4b965da4d578fc5559af3b6622ea7fe", kill_on_drop: false }`
[INFO] [stdout] 0315e0fb1975ab1218e5b5a523a8d88eb4b965da4d578fc5559af3b6622ea7fe