[INFO] cloning repository https://github.com/rbalicki2/wasm-experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rbalicki2/wasm-experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frbalicki2%2Fwasm-experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frbalicki2%2Fwasm-experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b8f0f4f0a15881da2c1bb80441efbdd060176e4
[INFO] testing rbalicki2/wasm-experiments against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frbalicki2%2Fwasm-experiments" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rbalicki2/wasm-experiments on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rbalicki2/wasm-experiments
[INFO] finished tweaking git repo https://github.com/rbalicki2/wasm-experiments
[INFO] tweaked toml for git repo https://github.com/rbalicki2/wasm-experiments written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/rbalicki2/wasm-experiments already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64dd8dcb2abbaf39d90d6c98ccfde0d0957dfda4d6ecc04bd45413c62c2ec1fa
[INFO] running `Command { std: "docker" "start" "-a" "64dd8dcb2abbaf39d90d6c98ccfde0d0957dfda4d6ecc04bd45413c62c2ec1fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64dd8dcb2abbaf39d90d6c98ccfde0d0957dfda4d6ecc04bd45413c62c2ec1fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64dd8dcb2abbaf39d90d6c98ccfde0d0957dfda4d6ecc04bd45413c62c2ec1fa", kill_on_drop: false }`
[INFO] [stdout] 64dd8dcb2abbaf39d90d6c98ccfde0d0957dfda4d6ecc04bd45413c62c2ec1fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1420ce4d799f4345bbe7e804ffb93f5854edb0132890b7420bc6871f1de8c59a
[INFO] running `Command { std: "docker" "start" "-a" "1420ce4d799f4345bbe7e804ffb93f5854edb0132890b7420bc6871f1de8c59a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling dtoa v0.4.2
[INFO] [stderr]    Compiling serde v1.0.27
[INFO] [stderr]    Compiling num-traits v0.1.41
[INFO] [stderr]    Compiling itoa v0.3.4
[INFO] [stderr]    Compiling serde_json v1.0.9
[INFO] [stderr]    Compiling stdweb v0.3.0
[INFO] [stderr]    Compiling wasm-minimal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(libc)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate libc;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #27812 <https://github.com/rust-lang/rust/issues/27812> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wasm-minimal`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "1420ce4d799f4345bbe7e804ffb93f5854edb0132890b7420bc6871f1de8c59a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1420ce4d799f4345bbe7e804ffb93f5854edb0132890b7420bc6871f1de8c59a", kill_on_drop: false }`
[INFO] [stdout] 1420ce4d799f4345bbe7e804ffb93f5854edb0132890b7420bc6871f1de8c59a
