[INFO] cloning repository https://github.com/vbe0201/Mirage
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vbe0201/Mirage" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvbe0201%2FMirage", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvbe0201%2FMirage'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d623268cfe1b8fb760f81144c2560e3554073e4
[INFO] testing vbe0201/Mirage against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvbe0201%2FMirage" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vbe0201/Mirage on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-9/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/vbe0201/Mirage
[INFO] finished tweaking git repo https://github.com/vbe0201/Mirage
[INFO] tweaked toml for git repo https://github.com/vbe0201/Mirage written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/vbe0201/Mirage already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a5e131e7889c7967d28f4b57679a80a024a8f402dd4298c3df595fd93d81ad89
[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" "a5e131e7889c7967d28f4b57679a80a024a8f402dd4298c3df595fd93d81ad89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5e131e7889c7967d28f4b57679a80a024a8f402dd4298c3df595fd93d81ad89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5e131e7889c7967d28f4b57679a80a024a8f402dd4298c3df595fd93d81ad89", kill_on_drop: false }`
[INFO] [stdout] a5e131e7889c7967d28f4b57679a80a024a8f402dd4298c3df595fd93d81ad89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae3bae046aff060368e1f6ce963ee0ea22f1ed96561c51b3660e6277abb8d190
[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" "ae3bae046aff060368e1f6ce963ee0ea22f1ed96561c51b3660e6277abb8d190", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling enum_primitive v0.1.1 (https://github.com/roblabla/enum_primitive-rs.git#e2344b98)
[INFO] [stderr]    Compiling mirage-mmio v1.0.0 (/opt/rustwide/workdir/mmio)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> mmio/src/lib.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 | #![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 `mirage-mmio`
[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" "ae3bae046aff060368e1f6ce963ee0ea22f1ed96561c51b3660e6277abb8d190", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae3bae046aff060368e1f6ce963ee0ea22f1ed96561c51b3660e6277abb8d190", kill_on_drop: false }`
[INFO] [stdout] ae3bae046aff060368e1f6ce963ee0ea22f1ed96561c51b3660e6277abb8d190