[INFO] cloning repository https://github.com/xvxx/vial-todo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xvxx/vial-todo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxvxx%2Fvial-todo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxvxx%2Fvial-todo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ec7cc06b5c1feee1bd72f77d6861cc47288e32a
[INFO] checking xvxx/vial-todo against master#c919f490bbcd2b29b74016101f7ec71aaa24bdbb for pr-79073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxvxx%2Fvial-todo" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xvxx/vial-todo on toolchain c919f490bbcd2b29b74016101f7ec71aaa24bdbb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xvxx/vial-todo
[INFO] finished tweaking git repo https://github.com/xvxx/vial-todo
[INFO] tweaked toml for git repo https://github.com/xvxx/vial-todo written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/xvxx/vial-todo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58fa135a0fad71411f131e57e2f1c3a06c864195823eed232ff1bad6006355b6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "58fa135a0fad71411f131e57e2f1c3a06c864195823eed232ff1bad6006355b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58fa135a0fad71411f131e57e2f1c3a06c864195823eed232ff1bad6006355b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58fa135a0fad71411f131e57e2f1c3a06c864195823eed232ff1bad6006355b6", kill_on_drop: false }`
[INFO] [stdout] 58fa135a0fad71411f131e57e2f1c3a06c864195823eed232ff1bad6006355b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0aebc6bf0fc40bcae65519a6d2be81104f58d9c2aa03c7482b03c62e54581502
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0aebc6bf0fc40bcae65519a6d2be81104f58d9c2aa03c7482b03c62e54581502", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking gimli v0.21.0
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking object v0.19.0
[INFO] [stderr]    Compiling vial v0.1.0
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking libc-strftime v0.2.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking addr2line v0.12.1
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking ron v0.2.2
[INFO] [stderr]     Checking rustbreak v2.0.0-rc3
[INFO] [stderr]     Checking vial-todo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/db.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn pop(&self) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/db.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn pop(&self) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/db.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     mem::replace(&mut db[id], todo);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/db.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     mem::replace(&mut db[id], todo);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.12s
[INFO] running `Command { std: "docker" "inspect" "0aebc6bf0fc40bcae65519a6d2be81104f58d9c2aa03c7482b03c62e54581502", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aebc6bf0fc40bcae65519a6d2be81104f58d9c2aa03c7482b03c62e54581502", kill_on_drop: false }`
[INFO] [stdout] 0aebc6bf0fc40bcae65519a6d2be81104f58d9c2aa03c7482b03c62e54581502