[INFO] crate ufmt 0.1.0-beta.5 is already in cache
[INFO] extracting crate ufmt 0.1.0-beta.5 into work/ex/beta-1.38-1/sources/1.37.0/reg/ufmt/0.1.0-beta.5
[INFO] extracting crate ufmt 0.1.0-beta.5 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ufmt/0.1.0-beta.5
[INFO] validating manifest of ufmt-0.1.0-beta.5 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ufmt-0.1.0-beta.5 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ufmt-0.1.0-beta.5
[INFO] finished frobbing ufmt-0.1.0-beta.5
[INFO] frobbed toml for ufmt-0.1.0-beta.5 written to work/ex/beta-1.38-1/sources/1.37.0/reg/ufmt/0.1.0-beta.5/Cargo.toml
[INFO] started frobbing ufmt-0.1.0-beta.5
[INFO] finished frobbing ufmt-0.1.0-beta.5
[INFO] frobbed toml for ufmt-0.1.0-beta.5 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ufmt/0.1.0-beta.5/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ufmt-0.1.0-beta.5 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/ufmt/0.1.0-beta.5:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 2448555f2a5b660daa8ef858ab383865e6f99abfbe7e908b4489ed11d9c15113
[INFO] running `"docker" "start" "-a" "2448555f2a5b660daa8ef858ab383865e6f99abfbe7e908b4489ed11d9c15113"`
[INFO] [stderr]    Compiling ufmt-write v0.1.0-beta.1
[INFO] [stderr]    Compiling ufmt-macros v0.1.0-beta.4
[INFO] [stderr]    Compiling ufmt v0.1.0-beta.5 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.30s
[INFO] running `"docker" "inspect" "2448555f2a5b660daa8ef858ab383865e6f99abfbe7e908b4489ed11d9c15113"`
[INFO] running `"docker" "rm" "-f" "2448555f2a5b660daa8ef858ab383865e6f99abfbe7e908b4489ed11d9c15113"`
[INFO] [stdout] 2448555f2a5b660daa8ef858ab383865e6f99abfbe7e908b4489ed11d9c15113
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/ufmt/0.1.0-beta.5:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 22406c31fbaa58ef30895fc61a56dbe2f3435136203573dbf1d68394ef291b75
[INFO] running `"docker" "start" "-a" "22406c31fbaa58ef30895fc61a56dbe2f3435136203573dbf1d68394ef291b75"`
[INFO] [stderr]    Compiling ufmt v0.1.0-beta.5 (/opt/crater/workdir)
[INFO] [stderr] error: run `cargo test --features std` instead of `cargo test`
[INFO] [stderr]    --> src/lib.rs:234:1
[INFO] [stderr]     |
[INFO] [stderr] 234 | compile_error!("run `cargo test --features std` instead of `cargo test`");
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]    --> src/lib.rs:203:19
[INFO] [stderr]     |
[INFO] [stderr] 203 | #![cfg_attr(test, feature(proc_macro_hygiene))]
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `ufmt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "22406c31fbaa58ef30895fc61a56dbe2f3435136203573dbf1d68394ef291b75"`
[INFO] running `"docker" "rm" "-f" "22406c31fbaa58ef30895fc61a56dbe2f3435136203573dbf1d68394ef291b75"`
[INFO] [stdout] 22406c31fbaa58ef30895fc61a56dbe2f3435136203573dbf1d68394ef291b75