[INFO] cloning repository https://github.com/ipost/rmosaic
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ipost/rmosaic" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fipost%2Frmosaic", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fipost%2Frmosaic'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ccd954abdbf724466bb082a1068f025f706facee
[INFO] checking ipost/rmosaic against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fipost%2Frmosaic" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ipost/rmosaic on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ipost/rmosaic
[INFO] finished tweaking git repo https://github.com/ipost/rmosaic
[INFO] tweaked toml for git repo https://github.com/ipost/rmosaic written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/ipost/rmosaic already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-derive v0.2.0
[INFO] [stderr]   Downloaded serde v1.0.47
[INFO] [stderr]   Downloaded serde_derive v1.0.48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e36b806710331733c78aeea9bb02f0af31019ff318295281e539a618807f0b9
[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" "1e36b806710331733c78aeea9bb02f0af31019ff318295281e539a618807f0b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e36b806710331733c78aeea9bb02f0af31019ff318295281e539a618807f0b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e36b806710331733c78aeea9bb02f0af31019ff318295281e539a618807f0b9", kill_on_drop: false }`
[INFO] [stdout] 1e36b806710331733c78aeea9bb02f0af31019ff318295281e539a618807f0b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f2e678f431bb28122aeb29ff3701534e9140f286c77e038f91d4acab48612016
[INFO] running `Command { std: "docker" "start" "-a" "f2e678f431bb28122aeb29ff3701534e9140f286c77e038f91d4acab48612016", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]     Checking cfg-if v0.1.3
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]     Checking byteorder v1.2.2
[INFO] [stderr]     Checking adler32 v1.0.2
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking serde v1.0.47
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking md5 v0.3.7
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]     Checking gif v0.10.0
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking inflate v0.4.2
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking deflate v0.7.18
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking atty v0.2.10
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]    Compiling syn v0.13.7
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking rayon v1.0.1
[INFO] [stderr]    Compiling num-derive v0.2.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling serde_derive v1.0.48
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking serde_json v1.0.17
[INFO] [stderr]     Checking rmosaic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 129 |             let mut l_color_cache = color_cache.lock().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/main.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |             let mut l_library_cache = library_cache.lock().unwrap();
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 129 |             let mut l_color_cache = color_cache.lock().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/main.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |             let mut l_library_cache = library_cache.lock().unwrap();
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[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 51.87s
[INFO] running `Command { std: "docker" "inspect" "f2e678f431bb28122aeb29ff3701534e9140f286c77e038f91d4acab48612016", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2e678f431bb28122aeb29ff3701534e9140f286c77e038f91d4acab48612016", kill_on_drop: false }`
[INFO] [stdout] f2e678f431bb28122aeb29ff3701534e9140f286c77e038f91d4acab48612016