[INFO] cloning repository https://github.com/sscdotopen/puppies
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sscdotopen/puppies" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsscdotopen%2Fpuppies", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsscdotopen%2Fpuppies'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c51e6a702c8cdbe4d8d271cce9687174af290b8f
[INFO] checking sscdotopen/puppies against master#04e957578c77c95a0505f5818d0068b459f673e3 for pr-108782-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsscdotopen%2Fpuppies" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sscdotopen/puppies on toolchain 04e957578c77c95a0505f5818d0068b459f673e3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+04e957578c77c95a0505f5818d0068b459f673e3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sscdotopen/puppies
[INFO] finished tweaking git repo https://github.com/sscdotopen/puppies
[INFO] tweaked toml for git repo https://github.com/sscdotopen/puppies written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sscdotopen/puppies 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" "+04e957578c77c95a0505f5818d0068b459f673e3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustc-serialize v0.3.24
[INFO] [stderr]   Downloaded bencher v0.1.3
[INFO] [stderr]   Downloaded csv v0.15.0
[INFO] [stderr]   Downloaded libc v0.2.29
[INFO] [stderr]   Downloaded magenta-sys v0.1.1
[INFO] [stderr]   Downloaded magenta v0.1.1
[INFO] [stderr]   Downloaded custom_derive v0.1.7
[INFO] [stderr]   Downloaded conv v0.3.3
[INFO] [stderr]   Downloaded rand v0.3.16
[INFO] [stderr]   Downloaded fnv v1.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e2a9e7e193985ba0d5a8221c3984785a9e0a75acc409a02815633ff67a1f464e" "/opt/rustwide/cargo-home/bin/cargo" "+04e957578c77c95a0505f5818d0068b459f673e3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02f0d859a5a62e6aed6f6cf9375812d2da4ee409f653f98427a3e9455bb18ed1
[INFO] running `Command { std: "docker" "start" "-a" "02f0d859a5a62e6aed6f6cf9375812d2da4ee409f653f98427a3e9455bb18ed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02f0d859a5a62e6aed6f6cf9375812d2da4ee409f653f98427a3e9455bb18ed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02f0d859a5a62e6aed6f6cf9375812d2da4ee409f653f98427a3e9455bb18ed1", kill_on_drop: false }`
[INFO] [stdout] 02f0d859a5a62e6aed6f6cf9375812d2da4ee409f653f98427a3e9455bb18ed1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e2a9e7e193985ba0d5a8221c3984785a9e0a75acc409a02815633ff67a1f464e" "/opt/rustwide/cargo-home/bin/cargo" "+04e957578c77c95a0505f5818d0068b459f673e3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85d5db2fd972776fb5d63218eaf987791875cc63b3aef6ca54bc67983146d036
[INFO] running `Command { std: "docker" "start" "-a" "85d5db2fd972776fb5d63218eaf987791875cc63b3aef6ca54bc67983146d036", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.29
[INFO] [stderr]     Checking variance v0.1.3
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]     Checking scopeguard v0.1.2
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking fnv v1.0.5
[INFO] [stderr]     Checking bencher v0.1.3
[INFO] [stderr]     Checking scoped-pool v1.0.0
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking csv v0.15.0
[INFO] [stderr]     Checking puppies v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:83:21
[INFO] [stdout]    |
[INFO] [stdout] 83 |                 let mut user_history = samples_of_a.get_mut(user_idx).unwrap();
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:83:21
[INFO] [stdout]    |
[INFO] [stdout] 83 |                 let mut user_history = samples_of_a.get_mut(user_idx).unwrap();
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.80s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "85d5db2fd972776fb5d63218eaf987791875cc63b3aef6ca54bc67983146d036", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85d5db2fd972776fb5d63218eaf987791875cc63b3aef6ca54bc67983146d036", kill_on_drop: false }`
[INFO] [stdout] 85d5db2fd972776fb5d63218eaf987791875cc63b3aef6ca54bc67983146d036