[INFO] fetching crate vexide-async 0.2.0-alpha.2...
[INFO] testing vexide-async-0.2.0-alpha.2 against 1.91.0 for beta-1.92-2
[INFO] extracting crate vexide-async 0.2.0-alpha.2 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate vexide-async 0.2.0-alpha.2
[INFO] finished tweaking crates.io crate vexide-async 0.2.0-alpha.2
[INFO] tweaked toml for crates.io crate vexide-async 0.2.0-alpha.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate vexide-async 0.2.0-alpha.2 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate vexide-async 0.2.0-alpha.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded waker-fn v1.2.0
[INFO] [stderr]   Downloaded async-task v4.7.1
[INFO] [stderr]   Downloaded vex-sdk v0.27.1
[INFO] [stderr]   Downloaded async-lock v3.4.1
[INFO] [stderr]   Downloaded vex-sdk-mock v0.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 53f33e5efba158c16bd327751f5b32b7ede691034c695e76e8becc0898a90442
[INFO] running `Command { std: "docker" "start" "-a" "53f33e5efba158c16bd327751f5b32b7ede691034c695e76e8becc0898a90442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53f33e5efba158c16bd327751f5b32b7ede691034c695e76e8becc0898a90442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53f33e5efba158c16bd327751f5b32b7ede691034c695e76e8becc0898a90442", kill_on_drop: false }`
[INFO] [stdout] 53f33e5efba158c16bd327751f5b32b7ede691034c695e76e8becc0898a90442
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f864f6a930c452672502befd49a6b2c00b626ef1945a41a26ebabcd29c46e03f
[INFO] running `Command { std: "docker" "start" "-a" "f864f6a930c452672502befd49a6b2c00b626ef1945a41a26ebabcd29c46e03f", kill_on_drop: false }`
[INFO] [stderr]    Compiling waker-fn v1.2.0
[INFO] [stderr]    Compiling async-task v4.7.1
[INFO] [stderr]    Compiling vex-sdk v0.27.1
[INFO] [stderr]    Compiling vexide-async v0.2.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "f864f6a930c452672502befd49a6b2c00b626ef1945a41a26ebabcd29c46e03f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f864f6a930c452672502befd49a6b2c00b626ef1945a41a26ebabcd29c46e03f", kill_on_drop: false }`
[INFO] [stdout] f864f6a930c452672502befd49a6b2c00b626ef1945a41a26ebabcd29c46e03f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 551d8ddb7d9f6ef562ed0b8fed4dd953653c90cf26d3782b4e0892abb3256c67
[INFO] running `Command { std: "docker" "start" "-a" "551d8ddb7d9f6ef562ed0b8fed4dd953653c90cf26d3782b4e0892abb3256c67", kill_on_drop: false }`
[INFO] [stderr]    Compiling vex-sdk-mock v0.0.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/vex-sdk-mock-0.0.1/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(c_variadic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vex-sdk-mock` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "551d8ddb7d9f6ef562ed0b8fed4dd953653c90cf26d3782b4e0892abb3256c67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "551d8ddb7d9f6ef562ed0b8fed4dd953653c90cf26d3782b4e0892abb3256c67", kill_on_drop: false }`
[INFO] [stdout] 551d8ddb7d9f6ef562ed0b8fed4dd953653c90cf26d3782b4e0892abb3256c67