[INFO] crate hp-log 0.3.1 is already in cache
[INFO] testing hp-log-0.3.1 against 1.38.0 for beta-1.39-1
[INFO] extracting crate hp-log 0.3.1 into work/builds/worker-7/source
[INFO] validating manifest of crates.io crate hp-log 0.3.1 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 hp-log 0.3.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate hp-log 0.3.1
[INFO] tweaked toml for crates.io crate hp-log 0.3.1 written to work/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate hp-log 0.3.1 already has a lockfile, it will not be regenerated
[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-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/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] 532b19a107e0304ad1cd649b1f656fa675fa3c8a7e9e2d98686d1478365a3bd3
[INFO] running `"docker" "start" "-a" "532b19a107e0304ad1cd649b1f656fa675fa3c8a7e9e2d98686d1478365a3bd3"`
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling strfmt v0.1.6
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr]    Compiling hp-log v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:2
[INFO] [stderr]   |
[INFO] [stderr] 2 |  #![feature(rustc_private)]
[INFO] [stderr]   |  ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/writer.rs:11:24
[INFO] [stderr]    |
[INFO] [stderr] 11 |     appenders: Vec<Box<Appender>>,
[INFO] [stderr]    |                        ^^^^^^^^ help: use `dyn`: `dyn Appender`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/writer.rs:82:50
[INFO] [stderr]    |
[INFO] [stderr] 82 |     pub fn add_appender(&mut self, appender: Box<Appender>) {
[INFO] [stderr]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn Appender`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]  --> src/config.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::sync::{Once, ONCE_INIT};
[INFO] [stderr]   |                       ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]  --> src/config.rs:8:26
[INFO] [stderr]   |
[INFO] [stderr] 8 | static INST_ONCE: Once = ONCE_INIT;
[INFO] [stderr]   |                          ^^^^^^^^^ help: replace the use of the deprecated item: `Once::new()`
[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 `hp-log`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "532b19a107e0304ad1cd649b1f656fa675fa3c8a7e9e2d98686d1478365a3bd3"`
[INFO] running `"docker" "rm" "-f" "532b19a107e0304ad1cd649b1f656fa675fa3c8a7e9e2d98686d1478365a3bd3"`
[INFO] [stdout] 532b19a107e0304ad1cd649b1f656fa675fa3c8a7e9e2d98686d1478365a3bd3