[INFO] crate dynamo 0.1.0 is already in cache
[INFO] testing dynamo-0.1.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate dynamo 0.1.0 into work/builds/worker-2/source
[INFO] validating manifest of crates.io crate dynamo 0.1.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate dynamo 0.1.0
[INFO] finished tweaking crates.io crate dynamo 0.1.0
[INFO] tweaked toml for crates.io crate dynamo 0.1.0 written to work/builds/worker-2/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] c2254cf9fd4a34bb1f0a2ee05629edb11bd2edcb1825f366ec7e36037da37d1b
[INFO] running `"docker" "start" "-a" "c2254cf9fd4a34bb1f0a2ee05629edb11bd2edcb1825f366ec7e36037da37d1b"`
[INFO] [stderr]    Compiling range v0.3.1
[INFO] [stderr]    Compiling read_token v0.6.2
[INFO] [stderr]    Compiling piston_meta v0.25.1
[INFO] [stderr]    Compiling dynamo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.53s
[INFO] running `"docker" "inspect" "c2254cf9fd4a34bb1f0a2ee05629edb11bd2edcb1825f366ec7e36037da37d1b"`
[INFO] running `"docker" "rm" "-f" "c2254cf9fd4a34bb1f0a2ee05629edb11bd2edcb1825f366ec7e36037da37d1b"`
[INFO] [stdout] c2254cf9fd4a34bb1f0a2ee05629edb11bd2edcb1825f366ec7e36037da37d1b
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 207cc83f1306718d9159041064eb68bda0279a94e594f19ea7024d698c98a7c4
[INFO] running `"docker" "start" "-a" "207cc83f1306718d9159041064eb68bda0279a94e594f19ea7024d698c98a7c4"`
[INFO] [stderr]    Compiling dynamo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(test, feature(test))]
[INFO] [stderr]   |                   ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `dynamo`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "207cc83f1306718d9159041064eb68bda0279a94e594f19ea7024d698c98a7c4"`
[INFO] running `"docker" "rm" "-f" "207cc83f1306718d9159041064eb68bda0279a94e594f19ea7024d698c98a7c4"`
[INFO] [stdout] 207cc83f1306718d9159041064eb68bda0279a94e594f19ea7024d698c98a7c4