[INFO] cloning repository https://github.com/Weltraumschaf/minivm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Weltraumschaf/minivm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWeltraumschaf%2Fminivm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWeltraumschaf%2Fminivm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f6257253bbca9cc6ea5f83a3c6dca902dcd1d1f6
[INFO] checking Weltraumschaf/minivm against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWeltraumschaf%2Fminivm" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Weltraumschaf/minivm on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Weltraumschaf/minivm
[INFO] finished tweaking git repo https://github.com/Weltraumschaf/minivm
[INFO] tweaked toml for git repo https://github.com/Weltraumschaf/minivm written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/Weltraumschaf/minivm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 646131b422c47b41ed14877d565896ce6546992ac36d065e0e517dc0bce52deb
[INFO] running `Command { std: "docker" "start" "-a" "646131b422c47b41ed14877d565896ce6546992ac36d065e0e517dc0bce52deb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "646131b422c47b41ed14877d565896ce6546992ac36d065e0e517dc0bce52deb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "646131b422c47b41ed14877d565896ce6546992ac36d065e0e517dc0bce52deb", kill_on_drop: false }`
[INFO] [stdout] 646131b422c47b41ed14877d565896ce6546992ac36d065e0e517dc0bce52deb
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 62d8ae53bcf1bc58208cdb8ac0e057e809699da0d5516a2ef77dfe39003c940b
[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" "62d8ae53bcf1bc58208cdb8ac0e057e809699da0d5516a2ef77dfe39003c940b", 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] [stderr]     Checking num-traits v0.2.0
[INFO] [stderr]     Checking termcolor v0.3.5
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking clap v2.30.0
[INFO] [stderr]     Checking humantime v1.1.0
[INFO] [stderr]     Checking env_logger v0.5.4
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking num-complex v0.1.42
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking num-bigint v0.1.43
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking hamcrest v0.1.5
[INFO] [stderr]     Checking minivm v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/frontend/character_helper.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         (CharacterHelper::is_alphabetic(ch) || CharacterHelper::is_numeric(ch))
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `minivm`
[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] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/commands/disassemble_command.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hamcrest::prelude::*`
[INFO] [stdout]   --> src/commands/disassemble_command.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     use hamcrest::prelude::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/frontend/character_helper.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         (CharacterHelper::is_alphabetic(ch) || CharacterHelper::is_numeric(ch))
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "62d8ae53bcf1bc58208cdb8ac0e057e809699da0d5516a2ef77dfe39003c940b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62d8ae53bcf1bc58208cdb8ac0e057e809699da0d5516a2ef77dfe39003c940b", kill_on_drop: false }`
[INFO] [stdout] 62d8ae53bcf1bc58208cdb8ac0e057e809699da0d5516a2ef77dfe39003c940b