[INFO] fetching crate gearley 0.0.4...
[INFO] testing gearley-0.0.4 against 1.47.0 for beta-1.48-1
[INFO] extracting crate gearley 0.0.4 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate gearley 0.0.4 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gearley 0.0.4
[INFO] finished tweaking crates.io crate gearley 0.0.4
[INFO] tweaked toml for crates.io crate gearley 0.0.4 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d949d985ae1023dfbfb03137b2cd90be078eb1cd6ed3b4daaabc9ddf1ef4610
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7d949d985ae1023dfbfb03137b2cd90be078eb1cd6ed3b4daaabc9ddf1ef4610", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d949d985ae1023dfbfb03137b2cd90be078eb1cd6ed3b4daaabc9ddf1ef4610", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d949d985ae1023dfbfb03137b2cd90be078eb1cd6ed3b4daaabc9ddf1ef4610", kill_on_drop: false }`
[INFO] [stdout] 7d949d985ae1023dfbfb03137b2cd90be078eb1cd6ed3b4daaabc9ddf1ef4610
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6681590a4b9738caa3fd70f958e72546159f1b361fa6572b494f2aa1ae93062f
[INFO] running `Command { std: "docker" "start" "-a" "6681590a4b9738caa3fd70f958e72546159f1b361fa6572b494f2aa1ae93062f", kill_on_drop: false }`
[INFO] [stderr]    Compiling ref_slice v1.2.0
[INFO] [stderr]    Compiling num-derive v0.3.2
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling optional v0.5.0
[INFO] [stderr]    Compiling bit-matrix v0.6.0
[INFO] [stderr]    Compiling cfg v0.5.0
[INFO] [stderr]    Compiling gearley v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `nop`
[INFO] [stdout]    --> src/forest/node.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     nop: NopRepr,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `nop`
[INFO] [stdout]    --> src/forest/node.rs:212:5
[INFO] [stdout]     |
[INFO] [stdout] 212 |     nop: u16,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.93s
[INFO] running `Command { std: "docker" "inspect" "6681590a4b9738caa3fd70f958e72546159f1b361fa6572b494f2aa1ae93062f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6681590a4b9738caa3fd70f958e72546159f1b361fa6572b494f2aa1ae93062f", kill_on_drop: false }`
[INFO] [stdout] 6681590a4b9738caa3fd70f958e72546159f1b361fa6572b494f2aa1ae93062f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b959c4b5a3752ab4aea78afa45c17a9757449d1780113ae084a8e2ddac2794bd
[INFO] running `Command { std: "docker" "start" "-a" "b959c4b5a3752ab4aea78afa45c17a9757449d1780113ae084a8e2ddac2794bd", 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] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling internship v0.6.0
[INFO] [stdout] warning: field is never read: `nop`
[INFO] [stdout]    --> src/forest/node.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     nop: NopRepr,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `nop`
[INFO] [stdout]    --> src/forest/node.rs:212:5
[INFO] [stdout]     |
[INFO] [stdout] 212 |     nop: u16,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling phf_macros v0.7.24
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]    Compiling c_lexer 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/github.com-1ecc6299db9ec823/c_lexer-0.1.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[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 `c_lexer`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "b959c4b5a3752ab4aea78afa45c17a9757449d1780113ae084a8e2ddac2794bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b959c4b5a3752ab4aea78afa45c17a9757449d1780113ae084a8e2ddac2794bd", kill_on_drop: false }`
[INFO] [stdout] b959c4b5a3752ab4aea78afa45c17a9757449d1780113ae084a8e2ddac2794bd
