Dec 11 15:31:49.475 INFO checking kevlarr/rusty-calc against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 15:31:49.475 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-0/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 11 15:31:49.906 INFO [stdout] 8b7fadbca62af5a9b43752140026efb59c6f8f88f767740f668afd2ce32d7d75
Dec 11 15:31:49.914 INFO running `"docker" "start" "-a" "8b7fadbca62af5a9b43752140026efb59c6f8f88f767740f668afd2ce32d7d75"`
Dec 11 15:31:51.115 INFO [stderr] usermod: no changes
Dec 11 15:31:51.167 INFO [stderr]     Checking rustycalc v0.1.0 (/source)
Dec 11 15:31:51.832 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 15:31:51.832 INFO [stderr]    --> src/types/binary.rs:111:9
Dec 11 15:31:51.832 INFO [stderr]     |
Dec 11 15:31:51.832 INFO [stderr] 111 |         write!(f, "0b");
Dec 11 15:31:51.832 INFO [stderr]     |         ^^^^^^^^^^^^^^^^
Dec 11 15:31:51.832 INFO [stderr]     |
Dec 11 15:31:51.832 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 11 15:31:51.832 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 15:31:51.832 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 11 15:31:51.832 INFO [stderr] 
Dec 11 15:31:51.832 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 15:31:51.832 INFO [stderr]    --> src/types/binary.rs:115:17
Dec 11 15:31:51.832 INFO [stderr]     |
Dec 11 15:31:51.832 INFO [stderr] 115 |                 write!(f, "_");
Dec 11 15:31:51.832 INFO [stderr]     |                 ^^^^^^^^^^^^^^^
Dec 11 15:31:51.832 INFO [stderr]     |
Dec 11 15:31:51.832 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 15:31:51.832 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 11 15:31:51.832 INFO [stderr] 
Dec 11 15:31:52.277 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 15:31:52.277 INFO [stderr]    --> src/types/binary.rs:111:9
Dec 11 15:31:52.277 INFO [stderr]     |
Dec 11 15:31:52.277 INFO [stderr] 111 |         write!(f, "0b");
Dec 11 15:31:52.277 INFO [stderr]     |         ^^^^^^^^^^^^^^^^
Dec 11 15:31:52.277 INFO [stderr]     |
Dec 11 15:31:52.277 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 11 15:31:52.277 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 15:31:52.277 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 11 15:31:52.277 INFO [stderr] 
Dec 11 15:31:52.277 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 15:31:52.277 INFO [stderr]    --> src/types/binary.rs:115:17
Dec 11 15:31:52.277 INFO [stderr]     |
Dec 11 15:31:52.277 INFO [stderr] 115 |                 write!(f, "_");
Dec 11 15:31:52.278 INFO [stderr]     |                 ^^^^^^^^^^^^^^^
Dec 11 15:31:52.278 INFO [stderr]     |
Dec 11 15:31:52.278 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 15:31:52.278 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 11 15:31:52.278 INFO [stderr] 
Dec 11 15:31:52.700 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
Dec 11 15:31:52.700 INFO [stderr] su: No module specific data is present
Dec 11 15:31:53.452 INFO running `"docker" "inspect" "8b7fadbca62af5a9b43752140026efb59c6f8f88f767740f668afd2ce32d7d75"`
Dec 11 15:31:53.648 INFO running `"docker" "rm" "-f" "8b7fadbca62af5a9b43752140026efb59c6f8f88f767740f668afd2ce32d7d75"`
Dec 11 15:31:53.884 INFO [stdout] 8b7fadbca62af5a9b43752140026efb59c6f8f88f767740f668afd2ce32d7d75