[INFO] fetching crate cotton 0.0.15...
[INFO] checking cotton-0.0.15 against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] extracting crate cotton 0.0.15 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate cotton 0.0.15 on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cotton 0.0.15
[INFO] finished tweaking crates.io crate cotton 0.0.15
[INFO] tweaked toml for crates.io crate cotton 0.0.15 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "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" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded shared_child v0.3.5
[INFO] [stderr]   Downloaded os_pipe v0.9.2
[INFO] [stderr]   Downloaded duct v0.13.5
[INFO] [stderr]   Downloaded shaman v0.1.0
[INFO] [stderr]   Downloaded error-context v0.1.2
[INFO] [stderr]   Downloaded problem v5.3.0
[INFO] [stderr]   Downloaded file-owner v0.1.0
[INFO] [stderr]   Downloaded file-mode v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", 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] fffb614c22853890ef301c1604a65fad54f13dd92ee739da1125f38ef5d82256
[INFO] running `Command { std: "docker" "start" "-a" "fffb614c22853890ef301c1604a65fad54f13dd92ee739da1125f38ef5d82256", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fffb614c22853890ef301c1604a65fad54f13dd92ee739da1125f38ef5d82256", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fffb614c22853890ef301c1604a65fad54f13dd92ee739da1125f38ef5d82256", kill_on_drop: false }`
[INFO] [stdout] fffb614c22853890ef301c1604a65fad54f13dd92ee739da1125f38ef5d82256
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33925d6f8a02642222be79b07bd61f1c3ac9a90d52c6f8f0cefcbe9f31b3846f
[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" "33925d6f8a02642222be79b07bd61f1c3ac9a90d52c6f8f0cefcbe9f31b3846f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking error-context v0.1.2
[INFO] [stderr]     Checking boolinator v2.4.0
[INFO] [stderr]     Checking assert_matches v1.5.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking app_dirs2 v2.3.2
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking shared_child v0.3.5
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking os_pipe v0.9.2
[INFO] [stderr]     Checking file-mode v0.1.2
[INFO] [stderr]     Checking filetime v0.2.14
[INFO] [stderr]     Checking exec v0.3.1
[INFO] [stderr]     Checking backtrace v0.3.57
[INFO] [stderr]     Checking duct v0.13.5
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking linked_hash_set v0.1.4
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking problem v5.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking shaman v0.1.0
[INFO] [stderr]     Checking file-owner v0.1.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking cotton v0.0.15 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.17s
[INFO] running `Command { std: "docker" "inspect" "33925d6f8a02642222be79b07bd61f1c3ac9a90d52c6f8f0cefcbe9f31b3846f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33925d6f8a02642222be79b07bd61f1c3ac9a90d52c6f8f0cefcbe9f31b3846f", kill_on_drop: false }`
[INFO] [stdout] 33925d6f8a02642222be79b07bd61f1c3ac9a90d52c6f8f0cefcbe9f31b3846f