[INFO] fetching crate i-o 0.4.7...
[INFO] checking i-o-0.4.7 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate i-o 0.4.7 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate i-o 0.4.7 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate i-o 0.4.7
[INFO] finished tweaking crates.io crate i-o 0.4.7
[INFO] tweaked toml for crates.io crate i-o 0.4.7 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f239bccdaf9608aab768e06c5fd0a84e9cf4063cbe6c50cc38aaed2526ce2da
[INFO] running `Command { std: "docker" "start" "-a" "5f239bccdaf9608aab768e06c5fd0a84e9cf4063cbe6c50cc38aaed2526ce2da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f239bccdaf9608aab768e06c5fd0a84e9cf4063cbe6c50cc38aaed2526ce2da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f239bccdaf9608aab768e06c5fd0a84e9cf4063cbe6c50cc38aaed2526ce2da", kill_on_drop: false }`
[INFO] [stdout] 5f239bccdaf9608aab768e06c5fd0a84e9cf4063cbe6c50cc38aaed2526ce2da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 969e5a9cd3553798e5740819aff988d9c9779634ef15e3c2611d43060a1cc7c8
[INFO] running `Command { std: "docker" "start" "-a" "969e5a9cd3553798e5740819aff988d9c9779634ef15e3c2611d43060a1cc7c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling ptr v0.2.3
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling hash-table v0.2.5
[INFO] [stderr]    Compiling containers v0.9.12
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]     Checking abort v0.1.3
[INFO] [stderr]    Compiling i-o v0.4.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking heap v0.1.0
[INFO] [stderr]     Checking rel v0.2.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking fallible v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking memchr v2.4.0
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking loca v0.7.2
[INFO] [stderr] warning: Cannot set `RUSTC_BOOTSTRAP=1` from build script of `i-o v0.4.7 (/opt/rustwide/workdir)`.
[INFO] [stderr] note: Crates cannot set `RUSTC_BOOTSTRAP` themselves, as doing so would subvert the stability guarantees of Rust for your project.
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/loca-0.7.2/src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(const_fn)]
[INFO] [stdout]    |            ^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `loca`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "969e5a9cd3553798e5740819aff988d9c9779634ef15e3c2611d43060a1cc7c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "969e5a9cd3553798e5740819aff988d9c9779634ef15e3c2611d43060a1cc7c8", kill_on_drop: false }`
[INFO] [stdout] 969e5a9cd3553798e5740819aff988d9c9779634ef15e3c2611d43060a1cc7c8