[INFO] fetching crate aqueue 1.1.3...
[INFO] testing aqueue-1.1.3 against 1.55.0 for beta-1.56-1
[INFO] extracting crate aqueue 1.1.3 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate aqueue 1.1.3 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 crates.io crate aqueue 1.1.3
[INFO] finished tweaking crates.io crate aqueue 1.1.3
[INFO] tweaked toml for crates.io crate aqueue 1.1.3 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate aqueue 1.1.3 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 1b3df9eaede587b75c0a33537509f4638c834ae08c24bca53ad065e4e89dff61
[INFO] running `Command { std: "docker" "start" "-a" "1b3df9eaede587b75c0a33537509f4638c834ae08c24bca53ad065e4e89dff61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b3df9eaede587b75c0a33537509f4638c834ae08c24bca53ad065e4e89dff61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b3df9eaede587b75c0a33537509f4638c834ae08c24bca53ad065e4e89dff61", kill_on_drop: false }`
[INFO] [stdout] 1b3df9eaede587b75c0a33537509f4638c834ae08c24bca53ad065e4e89dff61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 6e47259f9bb16cd7e96fc8b9413ccf938e6807ac8f4b215e32d6a8361727afe1
[INFO] running `Command { std: "docker" "start" "-a" "6e47259f9bb16cd7e96fc8b9413ccf938e6807ac8f4b215e32d6a8361727afe1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling futures-micro v0.5.0
[INFO] [stderr]    Compiling async-oneshot v0.5.0
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling aqueue v1.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.65s
[INFO] running `Command { std: "docker" "inspect" "6e47259f9bb16cd7e96fc8b9413ccf938e6807ac8f4b215e32d6a8361727afe1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e47259f9bb16cd7e96fc8b9413ccf938e6807ac8f4b215e32d6a8361727afe1", kill_on_drop: false }`
[INFO] [stdout] 6e47259f9bb16cd7e96fc8b9413ccf938e6807ac8f4b215e32d6a8361727afe1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d01f34e965e3509bff28cb7128f41a346092ccfa516e2be0d48a55f67cdf9cf7
[INFO] running `Command { std: "docker" "start" "-a" "d01f34e965e3509bff28cb7128f41a346092ccfa516e2be0d48a55f67cdf9cf7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling futures-core v0.3.14
[INFO] [stderr]    Compiling futures-sink v0.3.14
[INFO] [stderr]    Compiling futures-io v0.3.14
[INFO] [stderr]    Compiling futures-task v0.3.14
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]    Compiling ahash v0.4.7
[INFO] [stderr]    Compiling whoami v1.1.2
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling dotenv v0.15.0
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]    Compiling lock_api v0.4.3
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]    Compiling libsqlite3-sys v0.22.1
[INFO] [stderr]    Compiling ahash v0.7.2
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling stringprep v0.1.2
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.14
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling crossbeam-queue v0.3.1
[INFO] [stderr]    Compiling atoi v0.4.0
[INFO] [stderr]    Compiling sha2 v0.9.3
[INFO] [stderr]    Compiling futures-channel v0.3.14
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling hashlink v0.6.0
[INFO] [stderr]    Compiling url v2.2.1
[INFO] [stderr]    Compiling futures-util v0.3.14
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling openssl-sys v0.9.61
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling openssl v0.10.33
[INFO] [stderr]    Compiling futures-executor v0.3.14
[INFO] [stderr]    Compiling sqlformat v0.1.6
[INFO] [stderr]    Compiling futures v0.3.14
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling tokio-stream v0.1.5
[INFO] [stderr]    Compiling sqlx-rt v0.5.2
[INFO] [stderr]    Compiling sqlx-core v0.5.2
[INFO] [stderr]    Compiling sqlx-macros v0.5.2
[INFO] [stderr]    Compiling sqlx v0.5.2
[INFO] [stderr]    Compiling aqueue v1.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> examples/test_sqlx.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> tests/test.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aqueue` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[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" "d01f34e965e3509bff28cb7128f41a346092ccfa516e2be0d48a55f67cdf9cf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d01f34e965e3509bff28cb7128f41a346092ccfa516e2be0d48a55f67cdf9cf7", kill_on_drop: false }`
[INFO] [stdout] d01f34e965e3509bff28cb7128f41a346092ccfa516e2be0d48a55f67cdf9cf7