[INFO] cloning repository https://github.com/dcchut/dcc-lsystem
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dcchut/dcc-lsystem" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcchut%2Fdcc-lsystem", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcchut%2Fdcc-lsystem'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6c368025ff12fa07b398df8fd76337aaac2e820f
[INFO] checking dcchut/dcc-lsystem against try#024378d9203a4009ed73d6db2681b88a8d74ce7a for pr-112160
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcchut%2Fdcc-lsystem" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dcchut/dcc-lsystem on toolchain 024378d9203a4009ed73d6db2681b88a8d74ce7a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dcchut/dcc-lsystem
[INFO] finished tweaking git repo https://github.com/dcchut/dcc-lsystem
[INFO] tweaked toml for git repo https://github.com/dcchut/dcc-lsystem written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e9568f13c7df5b1e12ce040ec3d59bcb921879d03fa1ee16c5fd71adcb5669f6
[INFO] running `Command { std: "docker" "start" "-a" "e9568f13c7df5b1e12ce040ec3d59bcb921879d03fa1ee16c5fd71adcb5669f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9568f13c7df5b1e12ce040ec3d59bcb921879d03fa1ee16c5fd71adcb5669f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9568f13c7df5b1e12ce040ec3d59bcb921879d03fa1ee16c5fd71adcb5669f6", kill_on_drop: false }`
[INFO] [stdout] e9568f13c7df5b1e12ce040ec3d59bcb921879d03fa1ee16c5fd71adcb5669f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b3af5a5e0d060205a2409aa687a3e046e7a375cc450243a5b515e250d2430c6
[INFO] running `Command { std: "docker" "start" "-a" "4b3af5a5e0d060205a2409aa687a3e046e7a375cc450243a5b515e250d2430c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.145
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
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[INFO] [stderr]     Checking adler v1.0.2
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[INFO] [stderr]    Compiling io-lifetimes v1.0.11
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[INFO] [stderr]     Checking dyn-clone v1.0.11
[INFO] [stderr]     Checking gifski v1.12.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]     Checking pin-project v1.1.0
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]    Compiling dcc-lsystem-derive v0.1.2
[INFO] [stderr]     Checking exr v1.6.4
[INFO] [stderr]     Checking dcc-lsystem-derive v0.1.2 (/opt/rustwide/workdir/dcc-lsystem-derive)
[INFO] [stderr]     Checking nalgebra v0.30.1
[INFO] [stderr]     Checking image v0.24.6
[INFO] [stderr]     Checking imageproc v0.23.0
[INFO] [stderr]     Checking dcc-lsystem v0.7.0 (/opt/rustwide/workdir/dcc-lsystem)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]   --> dcc-lsystem/examples/random_fractal_generator.rs:60:57
[INFO] [stdout]    |
[INFO] [stdout] 60 |             axiom.push(choices.choose(&mut rng).unwrap().clone());
[INFO] [stdout]    |                                                         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> dcc-lsystem/examples/random_fractal_generator.rs:76:27
[INFO] [stdout]    |
[INFO] [stdout] 76 |                           .0
[INFO] [stdout]    |  ___________________________^
[INFO] [stdout] 77 | |                         .clone(),
[INFO] [stdout]    | |________________________________^ unnecessary method call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[deny(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> dcc-lsystem/examples/random_fractal_generator.rs:94:27
[INFO] [stdout]    |
[INFO] [stdout] 94 |                           .0
[INFO] [stdout]    |  ___________________________^
[INFO] [stdout] 95 | |                         .clone(),
[INFO] [stdout]    | |________________________________^ unnecessary method call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dcc-lsystem` (example "random_fractal_generator") due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "4b3af5a5e0d060205a2409aa687a3e046e7a375cc450243a5b515e250d2430c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b3af5a5e0d060205a2409aa687a3e046e7a375cc450243a5b515e250d2430c6", kill_on_drop: false }`
[INFO] [stdout] 4b3af5a5e0d060205a2409aa687a3e046e7a375cc450243a5b515e250d2430c6