[INFO] fetching crate lab_grader 0.11.0...
[INFO] checking lab_grader-0.11.0 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate lab_grader 0.11.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate lab_grader 0.11.0 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lab_grader 0.11.0
[INFO] finished tweaking crates.io crate lab_grader 0.11.0
[INFO] tweaked toml for crates.io crate lab_grader 0.11.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate lab_grader 0.11.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1bbd86c5d8e82d3f82d8443e261e76e69fa30f9517d60e033c7bbf2945c60a1f
[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" "1bbd86c5d8e82d3f82d8443e261e76e69fa30f9517d60e033c7bbf2945c60a1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1bbd86c5d8e82d3f82d8443e261e76e69fa30f9517d60e033c7bbf2945c60a1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bbd86c5d8e82d3f82d8443e261e76e69fa30f9517d60e033c7bbf2945c60a1f", kill_on_drop: false }`
[INFO] [stdout] 1bbd86c5d8e82d3f82d8443e261e76e69fa30f9517d60e033c7bbf2945c60a1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22dfd7353755e9a4a706a442a82393d09ded912d71a176a80de0003573bbb4c3
[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" "22dfd7353755e9a4a706a442a82393d09ded912d71a176a80de0003573bbb4c3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]     Checking tinyvec v0.3.3
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[INFO] [stderr]    Compiling cc v1.0.56
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[INFO] [stderr]     Checking bytes v0.5.5
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling zeroize v1.1.0
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]    Compiling smallvec v1.4.0
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]    Compiling state v0.4.1
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]    Compiling serde_json v1.0.56
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking gimli v0.21.0
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]     Checking lazycell v1.2.1
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[INFO] [stderr]    Compiling rocket_codegen v0.4.5
[INFO] [stderr]    Compiling num-traits v0.2.12
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[INFO] [stderr]     Checking log v0.3.9
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[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking aho-corasick v0.7.13
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[INFO] [stderr]     Checking block-buffer v0.7.3
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[INFO] [stderr]    Compiling openssl-sys v0.9.58
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[INFO] [stderr]    Compiling aes-gcm v0.5.0
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[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking tempdir v0.3.7
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[INFO] [stderr]     Checking tokio v0.2.21
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[INFO] [stderr]     Checking rand v0.7.3
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[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]    Compiling devise_core v0.2.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling devise_codegen v0.2.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling devise v0.2.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling pear v0.1.4
[INFO] [stderr]    Compiling rocket_http v0.4.5
[INFO] [stderr]     Checking pin-project v0.4.22
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking hyper v0.13.6
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[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking serde_yaml v0.8.13
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.6
[INFO] [stderr]     Checking rocket_contrib v0.4.5
[INFO] [stderr]     Checking lab_grader v0.11.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/rubric.rs:312:50
[INFO] [stdout]     |
[INFO] [stdout] 312 |         fn test_fn(_: &TestData) -> bool { true };
[INFO] [stdout]     |                                                  ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> examples/github_wiki.rs:70:26
[INFO] [stdout]    |
[INFO] [stdout] 70 |         Err(e) => panic!(format!("{}", e))
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 70 |         Err(e) => panic!("{}", e)
[INFO] [stdout]    |                         --     --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 31s
[INFO] running `Command { std: "docker" "inspect" "22dfd7353755e9a4a706a442a82393d09ded912d71a176a80de0003573bbb4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22dfd7353755e9a4a706a442a82393d09ded912d71a176a80de0003573bbb4c3", kill_on_drop: false }`
[INFO] [stdout] 22dfd7353755e9a4a706a442a82393d09ded912d71a176a80de0003573bbb4c3