[INFO] fetching crate gameshell 0.4.1...
[INFO] testing gameshell-0.4.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate gameshell 0.4.1 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate gameshell 0.4.1
[INFO] finished tweaking crates.io crate gameshell 0.4.1
[INFO] tweaked toml for crates.io crate gameshell 0.4.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate gameshell 0.4.1 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 101 packages to latest compatible versions
[INFO] [stderr]       Adding base64 v0.11.0 (available: v0.22.1)
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.7.0)
[INFO] [stderr]       Adding crossbeam-channel v0.4.4 (available: v0.5.15)
[INFO] [stderr]       Adding quickcheck v0.9.2 (available: v1.0.3)
[INFO] [stderr]       Adding quickcheck_macros v0.9.1 (available: v1.1.0)
[INFO] [stderr]       Adding rand v0.7.3 (available: v0.9.2)
[INFO] [stderr]       Adding tokio v0.2.25 (available: v1.47.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bytes v0.5.6
[INFO] [stderr]   Downloaded cmdmat v0.1.4
[INFO] [stderr]   Downloaded quickcheck_macros v0.9.1
[INFO] [stderr]   Downloaded quickcheck v0.9.2
[INFO] [stderr]   Downloaded pin-project-lite v0.1.12
[INFO] [stderr]   Downloaded slog v2.7.0
[INFO] [stderr]   Downloaded metac v0.1.1
[INFO] [stderr]   Downloaded tokio v0.2.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6de45cb4ff103af4e0ee026ed362ac1382a4d2827ec5f4515ca912322b448254
[INFO] running `Command { std: "docker" "start" "-a" "6de45cb4ff103af4e0ee026ed362ac1382a4d2827ec5f4515ca912322b448254", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6de45cb4ff103af4e0ee026ed362ac1382a4d2827ec5f4515ca912322b448254", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6de45cb4ff103af4e0ee026ed362ac1382a4d2827ec5f4515ca912322b448254", kill_on_drop: false }`
[INFO] [stdout] 6de45cb4ff103af4e0ee026ed362ac1382a4d2827ec5f4515ca912322b448254
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5de9843472f9f66c5f83e2361b17df7e73dd4f96a247943e3c39bd06a2cf8b67
[INFO] running `Command { std: "docker" "start" "-a" "5de9843472f9f66c5f83e2361b17df7e73dd4f96a247943e3c39bd06a2cf8b67", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex-syntax v0.8.6
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling cmdmat v0.1.4
[INFO] [stderr]    Compiling metac v0.1.1
[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/cmdmat-0.1.4/lib.rs:181:1
[INFO] [stdout]     |
[INFO] [stdout] 181 | #![feature(test, try_trait_v2)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/metac-0.1.1/lib.rs:105:1
[INFO] [stdout]     |
[INFO] [stdout] 105 | #![feature(test)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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] [stderr] error: could not compile `cmdmat` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `metac` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "5de9843472f9f66c5f83e2361b17df7e73dd4f96a247943e3c39bd06a2cf8b67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5de9843472f9f66c5f83e2361b17df7e73dd4f96a247943e3c39bd06a2cf8b67", kill_on_drop: false }`
[INFO] [stdout] 5de9843472f9f66c5f83e2361b17df7e73dd4f96a247943e3c39bd06a2cf8b67