Dec 12 12:36:22.405 INFO checking jens-0.4.2 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 12:36:22.405 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-3/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 12:36:22.868 INFO [stdout] 07c036da185614b51de970de889adedff2f26080f5f734be67481edb2ae342cb
Dec 12 12:36:22.868 INFO running `"docker" "start" "-a" "07c036da185614b51de970de889adedff2f26080f5f734be67481edb2ae342cb"`
Dec 12 12:36:24.039 INFO [stderr] usermod: no changes
Dec 12 12:36:24.111 INFO [stderr]     Checking jens v0.4.2 (/source)
Dec 12 12:36:25.380 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 12:36:25.380 INFO [stderr]    --> src/block.rs:129:17
Dec 12 12:36:25.380 INFO [stderr]     |
Dec 12 12:36:25.380 INFO [stderr] 129 |                 write!(f, "\n{}", prefix);
Dec 12 12:36:25.380 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 12:36:25.380 INFO [stderr]     |
Dec 12 12:36:25.380 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 12 12:36:25.380 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 12:36:25.380 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 12 12:36:25.380 INFO [stderr] 
Dec 12 12:36:25.617 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 12:36:25.617 INFO [stderr]    --> src/block.rs:129:17
Dec 12 12:36:25.617 INFO [stderr]     |
Dec 12 12:36:25.617 INFO [stderr] 129 |                 write!(f, "\n{}", prefix);
Dec 12 12:36:25.617 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 12:36:25.617 INFO [stderr]     |
Dec 12 12:36:25.617 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 12 12:36:25.617 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 12:36:25.617 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 12 12:36:25.617 INFO [stderr] 
Dec 12 12:36:25.618 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 12:36:25.618 INFO [stderr]    --> src/block.rs:257:9
Dec 12 12:36:25.618 INFO [stderr]     |
Dec 12 12:36:25.618 INFO [stderr] 257 |         write!(&mut s, "{}", function);
Dec 12 12:36:25.618 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 12:36:25.618 INFO [stderr]     |
Dec 12 12:36:25.619 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 12:36:25.619 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 12 12:36:25.619 INFO [stderr] 
Dec 12 12:36:27.112 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.03s
Dec 12 12:36:27.115 INFO [stderr] su: No module specific data is present
Dec 12 12:36:27.836 INFO running `"docker" "inspect" "07c036da185614b51de970de889adedff2f26080f5f734be67481edb2ae342cb"`
Dec 12 12:36:28.138 INFO running `"docker" "rm" "-f" "07c036da185614b51de970de889adedff2f26080f5f734be67481edb2ae342cb"`
Dec 12 12:36:28.540 INFO [stdout] 07c036da185614b51de970de889adedff2f26080f5f734be67481edb2ae342cb