[INFO] fetching crate gpu_rand 0.1.3...
[INFO] testing gpu_rand-0.1.3 against 1.90.0 for beta-1.91-3
[INFO] extracting crate gpu_rand 0.1.3 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate gpu_rand 0.1.3
[INFO] finished tweaking crates.io crate gpu_rand 0.1.3
[INFO] tweaked toml for crates.io crate gpu_rand 0.1.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate gpu_rand 0.1.3 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]      Locking 22 packages to latest compatible versions
[INFO] [stderr]       Adding rand_core v0.6.4 (available: v0.9.3)
[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 cust_core v0.1.1
[INFO] [stderr]   Downloaded cuda_std_macros v0.2.0
[INFO] [stderr]   Downloaded cust_derive v0.2.0
[INFO] [stderr]   Downloaded cuda_std v0.2.2
[INFO] [stderr]   Downloaded vek v0.15.10
[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] 0cc03694ddc9c51fbf35f8a7477fb6637b7ff4c251e568779cc6eb7adc007784
[INFO] running `Command { std: "docker" "start" "-a" "0cc03694ddc9c51fbf35f8a7477fb6637b7ff4c251e568779cc6eb7adc007784", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cc03694ddc9c51fbf35f8a7477fb6637b7ff4c251e568779cc6eb7adc007784", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cc03694ddc9c51fbf35f8a7477fb6637b7ff4c251e568779cc6eb7adc007784", kill_on_drop: false }`
[INFO] [stdout] 0cc03694ddc9c51fbf35f8a7477fb6637b7ff4c251e568779cc6eb7adc007784
[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] f7da0bb472d009c429e879562c60836eb91b9ef2a06a63c2cd5b2dd0db027bc5
[INFO] running `Command { std: "docker" "start" "-a" "f7da0bb472d009c429e879562c60836eb91b9ef2a06a63c2cd5b2dd0db027bc5", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling mint v0.5.9
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling vek v0.15.10
[INFO] [stderr]    Compiling cust_derive v0.2.0
[INFO] [stderr]    Compiling approx v0.5.1
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling glam v0.20.5
[INFO] [stderr]    Compiling cust_core v0.1.1
[INFO] [stderr]    Compiling gpu_rand v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(doc_cfg)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gpu_rand` (lib) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f7da0bb472d009c429e879562c60836eb91b9ef2a06a63c2cd5b2dd0db027bc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7da0bb472d009c429e879562c60836eb91b9ef2a06a63c2cd5b2dd0db027bc5", kill_on_drop: false }`
[INFO] [stdout] f7da0bb472d009c429e879562c60836eb91b9ef2a06a63c2cd5b2dd0db027bc5