[INFO] fetching crate lightbeam 0.30.0...
[INFO] testing lightbeam-0.30.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate lightbeam 0.30.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate lightbeam 0.30.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lightbeam 0.30.0
[INFO] finished tweaking crates.io crate lightbeam 0.30.0
[INFO] tweaked toml for crates.io crate lightbeam 0.30.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate lightbeam 0.30.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded target-lexicon v0.12.2
[INFO] [stderr]   Downloaded wasmparser v0.80.1
[INFO] [stderr]   Downloaded cranelift-entity v0.77.0
[INFO] [stderr]   Downloaded more-asserts v0.2.1
[INFO] [stderr]   Downloaded cranelift-bforest v0.77.0
[INFO] [stderr]   Downloaded dynasm v1.1.0
[INFO] [stderr]   Downloaded capstone v0.9.0
[INFO] [stderr]   Downloaded regalloc v0.0.31
[INFO] [stderr]   Downloaded cranelift-codegen-shared v0.77.0
[INFO] [stderr]   Downloaded dynasmrt v1.1.0
[INFO] [stderr]   Downloaded wat v1.0.40
[INFO] [stderr]   Downloaded cranelift-codegen v0.77.0
[INFO] [stderr]   Downloaded wast v38.0.0
[INFO] [stderr]   Downloaded iter-enum v1.0.1
[INFO] [stderr]   Downloaded cranelift-codegen-meta v0.77.0
[INFO] [stderr]   Downloaded capstone-sys v0.13.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 982cba3e7a3b250bb999dc128faa02dab1168ff07d274323bbaf961ee65ddd8f
[INFO] running `Command { std: "docker" "start" "-a" "982cba3e7a3b250bb999dc128faa02dab1168ff07d274323bbaf961ee65ddd8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "982cba3e7a3b250bb999dc128faa02dab1168ff07d274323bbaf961ee65ddd8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "982cba3e7a3b250bb999dc128faa02dab1168ff07d274323bbaf961ee65ddd8f", kill_on_drop: false }`
[INFO] [stdout] 982cba3e7a3b250bb999dc128faa02dab1168ff07d274323bbaf961ee65ddd8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd60e4375187326a3856c46ee5e8dfc3c6d726fe0a707a0a878ca27f48062470
[INFO] running `Command { std: "docker" "start" "-a" "cd60e4375187326a3856c46ee5e8dfc3c6d726fe0a707a0a878ca27f48062470", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]    Compiling cranelift-entity v0.77.0
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.77.0
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling target-lexicon v0.12.2
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling wasmparser v0.80.1
[INFO] [stderr]    Compiling more-asserts v0.2.1
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling unsafe-any v0.4.2
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling regalloc v0.0.31
[INFO] [stderr]    Compiling gimli v0.25.0
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.77.0
[INFO] [stderr]    Compiling cranelift-bforest v0.77.0
[INFO] [stderr]    Compiling memmap2 v0.2.3
[INFO] [stderr]    Compiling capstone-sys v0.13.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling derive_utils v0.11.2
[INFO] [stderr]    Compiling dynasm v1.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling iter-enum v1.0.1
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]    Compiling cranelift-codegen v0.77.0
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling dynasmrt v1.1.0
[INFO] [stderr]    Compiling capstone v0.9.0
[INFO] [stderr]    Compiling lightbeam v0.30.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `reg`
[INFO] [stdout]    --> src/backend.rs:680:5
[INFO] [stdout]     |
[INFO] [stdout] 680 |     reg: Option<GPR>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `imm`
[INFO] [stdout]    --> src/backend.rs:681:5
[INFO] [stdout]     |
[INFO] [stdout] 681 |     imm: usize,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `position`
[INFO] [stdout]    --> src/backend.rs:686:5
[INFO] [stdout]     |
[INFO] [stdout] 686 |     position: AssemblyOffset,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dst_reg`
[INFO] [stdout]    --> src/backend.rs:687:5
[INFO] [stdout]     |
[INFO] [stdout] 687 |     dst_reg: GPR,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address`
[INFO] [stdout]    --> src/backend.rs:688:5
[INFO] [stdout]     |
[INFO] [stdout] 688 |     address: RelocateAddress,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 44.96s
[INFO] running `Command { std: "docker" "inspect" "cd60e4375187326a3856c46ee5e8dfc3c6d726fe0a707a0a878ca27f48062470", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd60e4375187326a3856c46ee5e8dfc3c6d726fe0a707a0a878ca27f48062470", kill_on_drop: false }`
[INFO] [stdout] cd60e4375187326a3856c46ee5e8dfc3c6d726fe0a707a0a878ca27f48062470
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51ffd470086ed15edfe1fedb85b941f781dfc79e4d207223748e6e648b44a598
[INFO] running `Command { std: "docker" "start" "-a" "51ffd470086ed15edfe1fedb85b941f781dfc79e4d207223748e6e648b44a598", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.44
[INFO] [stderr]    Compiling leb128 v0.2.4
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling regalloc v0.0.31
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling wast v38.0.0
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling quickcheck v1.0.3
[INFO] [stderr]    Compiling cranelift-codegen v0.77.0
[INFO] [stderr]    Compiling wat v1.0.40
[INFO] [stderr]    Compiling lightbeam v0.30.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `reg`
[INFO] [stdout]    --> src/backend.rs:680:5
[INFO] [stdout]     |
[INFO] [stdout] 680 |     reg: Option<GPR>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `imm`
[INFO] [stdout]    --> src/backend.rs:681:5
[INFO] [stdout]     |
[INFO] [stdout] 681 |     imm: usize,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `position`
[INFO] [stdout]    --> src/backend.rs:686:5
[INFO] [stdout]     |
[INFO] [stdout] 686 |     position: AssemblyOffset,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dst_reg`
[INFO] [stdout]    --> src/backend.rs:687:5
[INFO] [stdout]     |
[INFO] [stdout] 687 |     dst_reg: GPR,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address`
[INFO] [stdout]    --> src/backend.rs:688:5
[INFO] [stdout]     |
[INFO] [stdout] 688 |     address: RelocateAddress,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `reg`
[INFO] [stdout]    --> src/backend.rs:680:5
[INFO] [stdout]     |
[INFO] [stdout] 680 |     reg: Option<GPR>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `imm`
[INFO] [stdout]    --> src/backend.rs:681:5
[INFO] [stdout]     |
[INFO] [stdout] 681 |     imm: usize,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `position`
[INFO] [stdout]    --> src/backend.rs:686:5
[INFO] [stdout]     |
[INFO] [stdout] 686 |     position: AssemblyOffset,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dst_reg`
[INFO] [stdout]    --> src/backend.rs:687:5
[INFO] [stdout]     |
[INFO] [stdout] 687 |     dst_reg: GPR,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address`
[INFO] [stdout]    --> src/backend.rs:688:5
[INFO] [stdout]     |
[INFO] [stdout] 688 |     address: RelocateAddress,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]   |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 5 warnings 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 `lightbeam` due to 2 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "51ffd470086ed15edfe1fedb85b941f781dfc79e4d207223748e6e648b44a598", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51ffd470086ed15edfe1fedb85b941f781dfc79e4d207223748e6e648b44a598", kill_on_drop: false }`
[INFO] [stdout] 51ffd470086ed15edfe1fedb85b941f781dfc79e4d207223748e6e648b44a598