[INFO] fetching crate barc 2.2.1...
[INFO] checking barc-2.2.1 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate barc 2.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate barc 2.2.1 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "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-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "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" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5a4071a92efeaf0bd5b7069b68c06dcfd235d52bf57615484f3af0ac474be35d
[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" "5a4071a92efeaf0bd5b7069b68c06dcfd235d52bf57615484f3af0ac474be35d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a4071a92efeaf0bd5b7069b68c06dcfd235d52bf57615484f3af0ac474be35d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a4071a92efeaf0bd5b7069b68c06dcfd235d52bf57615484f3af0ac474be35d", kill_on_drop: false }`
[INFO] [stdout] 5a4071a92efeaf0bd5b7069b68c06dcfd235d52bf57615484f3af0ac474be35d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03af1bd0185a8a53b75725e76aaff1e7734ee1ea9118c7250e41906b3086b294
[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" "03af1bd0185a8a53b75725e76aaff1e7734ee1ea9118c7250e41906b3086b294", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.89
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling tao-log v1.0.1
[INFO] [stderr]    Compiling olio v1.4.0
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.1
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking fnv v1.0.7
[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 http v0.2.3
[INFO] [stderr]     Checking alloc-stdlib v0.2.1
[INFO] [stderr]     Checking brotli-decompressor v2.3.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking brotli v3.3.0
[INFO] [stderr]     Checking rand v0.8.3
[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 is no longer accepted in Rust 2021
[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 24.65s
[INFO] running `Command { std: "docker" "inspect" "03af1bd0185a8a53b75725e76aaff1e7734ee1ea9118c7250e41906b3086b294", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03af1bd0185a8a53b75725e76aaff1e7734ee1ea9118c7250e41906b3086b294", kill_on_drop: false }`
[INFO] [stdout] 03af1bd0185a8a53b75725e76aaff1e7734ee1ea9118c7250e41906b3086b294