[INFO] fetching crate qemu-exit 0.1.4...
[INFO] checking qemu-exit-0.1.4 against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] extracting crate qemu-exit 0.1.4 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate qemu-exit 0.1.4 on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate qemu-exit 0.1.4
[INFO] finished tweaking crates.io crate qemu-exit 0.1.4
[INFO] tweaked toml for crates.io crate qemu-exit 0.1.4 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded x86_64 v0.11.8
[INFO] [stderr]   Downloaded bit_field v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "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] 3136e662c278b811c9f8ade582e5ed226a841caa92cd9e2f4f9abbbfddf06fb6
[INFO] running `Command { std: "docker" "start" "-a" "3136e662c278b811c9f8ade582e5ed226a841caa92cd9e2f4f9abbbfddf06fb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3136e662c278b811c9f8ade582e5ed226a841caa92cd9e2f4f9abbbfddf06fb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3136e662c278b811c9f8ade582e5ed226a841caa92cd9e2f4f9abbbfddf06fb6", kill_on_drop: false }`
[INFO] [stdout] 3136e662c278b811c9f8ade582e5ed226a841caa92cd9e2f4f9abbbfddf06fb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e61e93c85f40cbdaafb6c770505a6fcdbe27f684c3ec52f9a1ad81d7444d40c
[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" "0e61e93c85f40cbdaafb6c770505a6fcdbe27f684c3ec52f9a1ad81d7444d40c", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling x86_64 v0.11.8
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stdout] error[E0658]: mutable references are not allowed in constant functions
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/x86_64-0.11.8/src/structures/idt.rs:378:31
[INFO] [stdout]     |
[INFO] [stdout] 378 |                 divide_error: Entry::missing(),
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
[INFO] [stdout]     = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
[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 E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x86_64`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "0e61e93c85f40cbdaafb6c770505a6fcdbe27f684c3ec52f9a1ad81d7444d40c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e61e93c85f40cbdaafb6c770505a6fcdbe27f684c3ec52f9a1ad81d7444d40c", kill_on_drop: false }`
[INFO] [stdout] 0e61e93c85f40cbdaafb6c770505a6fcdbe27f684c3ec52f9a1ad81d7444d40c