[INFO] fetching crate barc 2.2.1...
[INFO] checking barc-2.2.1 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate barc 2.2.1 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate barc 2.2.1 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate barc 2.2.1
[INFO] finished tweaking crates.io crate barc 2.2.1
[INFO] tweaked toml for crates.io crate barc 2.2.1 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e139fd6156202296015d2b09580dc72d2ffc2c933f63e1c8253dea577036f3d2
[INFO] running `Command { std: "docker" "start" "-a" "e139fd6156202296015d2b09580dc72d2ffc2c933f63e1c8253dea577036f3d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e139fd6156202296015d2b09580dc72d2ffc2c933f63e1c8253dea577036f3d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e139fd6156202296015d2b09580dc72d2ffc2c933f63e1c8253dea577036f3d2", kill_on_drop: false }`
[INFO] [stdout] e139fd6156202296015d2b09580dc72d2ffc2c933f63e1c8253dea577036f3d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78e8b7d4cff20cab408bd8d03ec9ef03fc83debb0d8119934db3fa8b71f01840
[INFO] running `Command { std: "docker" "start" "-a" "78e8b7d4cff20cab408bd8d03ec9ef03fc83debb0d8119934db3fa8b71f01840", kill_on_drop: false }`
[INFO] [stderr]    Compiling olio v1.4.0
[INFO] [stderr]    Compiling tao-log v1.0.1
[INFO] [stderr]    Compiling body-image v2.2.2
[INFO] [stderr]    Compiling barc v2.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling piccolog v1.0.3
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]     --> src/lib.rs:1663:52
[INFO] [stdout]      |
[INFO] [stdout] 1663 |                 assert!(em.contains("Incomplete"), em)
[INFO] [stdout]      |                                                    ^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]      = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]      |
[INFO] [stdout] 1663 |                 assert!(em.contains("Incomplete"), "{}", em)
[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 4.53s
[INFO] running `Command { std: "docker" "inspect" "78e8b7d4cff20cab408bd8d03ec9ef03fc83debb0d8119934db3fa8b71f01840", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78e8b7d4cff20cab408bd8d03ec9ef03fc83debb0d8119934db3fa8b71f01840", kill_on_drop: false }`
[INFO] [stdout] 78e8b7d4cff20cab408bd8d03ec9ef03fc83debb0d8119934db3fa8b71f01840