[INFO] crate remain 0.1.4 is already in cache
[INFO] testing remain-0.1.4 against 1.38.0 for beta-1.39-1
[INFO] extracting crate remain 0.1.4 into work/builds/worker-11/source
[INFO] validating manifest of crates.io crate remain 0.1.4 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 remain 0.1.4
[INFO] finished tweaking crates.io crate remain 0.1.4
[INFO] tweaked toml for crates.io crate remain 0.1.4 written to work/builds/worker-11/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-11/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-11/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] 2de998376a605cfd9d677120d30dbfa8d0c4da95b74982fa4ae75a5ac0e04b9d
[INFO] running `"docker" "start" "-a" "2de998376a605cfd9d677120d30dbfa8d0c4da95b74982fa4ae75a5ac0e04b9d"`
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling remain v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.89s
[INFO] running `"docker" "inspect" "2de998376a605cfd9d677120d30dbfa8d0c4da95b74982fa4ae75a5ac0e04b9d"`
[INFO] running `"docker" "rm" "-f" "2de998376a605cfd9d677120d30dbfa8d0c4da95b74982fa4ae75a5ac0e04b9d"`
[INFO] [stdout] 2de998376a605cfd9d677120d30dbfa8d0c4da95b74982fa4ae75a5ac0e04b9d
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-11/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] 79432514a48bcdb4c245ad1eb392ea519ef7fc6be65aefb45004d5d2e9a2c671
[INFO] running `"docker" "start" "-a" "79432514a48bcdb4c245ad1eb392ea519ef7fc6be65aefb45004d5d2e9a2c671"`
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling rustversion v0.1.4
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling toml v0.5.3
[INFO] [stderr]    Compiling serde_json v1.0.41
[INFO] [stderr]    Compiling trybuild v1.0.17
[INFO] [stderr]    Compiling remain v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> tests/unstable.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(proc_macro_hygiene, stmt_expr_attributes)]
[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 `remain`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "79432514a48bcdb4c245ad1eb392ea519ef7fc6be65aefb45004d5d2e9a2c671"`
[INFO] running `"docker" "rm" "-f" "79432514a48bcdb4c245ad1eb392ea519ef7fc6be65aefb45004d5d2e9a2c671"`
[INFO] [stdout] 79432514a48bcdb4c245ad1eb392ea519ef7fc6be65aefb45004d5d2e9a2c671