[INFO] cloning repository https://github.com/JohnPeng47/fuzz_emus
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JohnPeng47/fuzz_emus" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohnPeng47%2Ffuzz_emus", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohnPeng47%2Ffuzz_emus'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 901b181d1775a20208b85f1072cde3add0513422
[INFO] testing JohnPeng47/fuzz_emus against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohnPeng47%2Ffuzz_emus" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JohnPeng47/fuzz_emus on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JohnPeng47/fuzz_emus
[INFO] finished tweaking git repo https://github.com/JohnPeng47/fuzz_emus
[INFO] tweaked toml for git repo https://github.com/JohnPeng47/fuzz_emus written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/JohnPeng47/fuzz_emus already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4dafad4f4b9ce3b1bcbe0bbe5b0110c166ff205f9aaf10505856536986e75f6
[INFO] running `Command { std: "docker" "start" "-a" "c4dafad4f4b9ce3b1bcbe0bbe5b0110c166ff205f9aaf10505856536986e75f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4dafad4f4b9ce3b1bcbe0bbe5b0110c166ff205f9aaf10505856536986e75f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4dafad4f4b9ce3b1bcbe0bbe5b0110c166ff205f9aaf10505856536986e75f6", kill_on_drop: false }`
[INFO] [stdout] c4dafad4f4b9ce3b1bcbe0bbe5b0110c166ff205f9aaf10505856536986e75f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ca6931ad956f36320a6f66710721ee9d54bbcdc0cd62369052c61497adb8db4
[INFO] running `Command { std: "docker" "start" "-a" "9ca6931ad956f36320a6f66710721ee9d54bbcdc0cd62369052c61497adb8db4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling atomicvec v0.1.0 (/opt/rustwide/workdir/shared/atomicvec)
[INFO] [stderr]    Compiling aht v0.1.0 (/opt/rustwide/workdir/shared/aht)
[INFO] [stderr]    Compiling falkhash v0.1.0 (/opt/rustwide/workdir/shared/falkhash)
[INFO] [stderr]    Compiling basic_mutator v0.1.0 (/opt/rustwide/workdir/shared/mutator)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> shared/aht/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(const_generics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> shared/atomicvec/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(const_generics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Seed`
[INFO] [stdout]   --> shared/mutator/src/lib.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Seed {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> shared/aht/src/lib.rs:116:26
[INFO] [stdout]     |
[INFO] [stdout] 116 |                         .compare_and_swap(empty, filling,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> shared/atomicvec/src/lib.rs:66:28
[INFO] [stdout]    |
[INFO] [stdout] 66 |             if self.in_use.compare_and_swap(cur, cur + 1,
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aht` due to 2 previous errors; 1 warning emitted
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "9ca6931ad956f36320a6f66710721ee9d54bbcdc0cd62369052c61497adb8db4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ca6931ad956f36320a6f66710721ee9d54bbcdc0cd62369052c61497adb8db4", kill_on_drop: false }`
[INFO] [stdout] 9ca6931ad956f36320a6f66710721ee9d54bbcdc0cd62369052c61497adb8db4