Dec 05 06:55:36.875 INFO checking serde-xml-rs-0.2.1 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 06:55:36.875 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 05 06:55:37.307 INFO [stdout] ced1ea8f156f60bd4bdd2d92f3580340ebf565972b91f131014382866bd9a434
Dec 05 06:55:37.309 INFO running `"docker" "start" "-a" "ced1ea8f156f60bd4bdd2d92f3580340ebf565972b91f131014382866bd9a434"`
Dec 05 06:55:38.285 INFO [stderr] usermod: no changes
Dec 05 06:55:38.387 INFO [stderr]     Checking serde-xml-rs v0.2.1 (/source)
Dec 05 06:55:39.699 INFO [stderr] warning: variable does not need to be mutable
Dec 05 06:55:39.699 INFO [stderr]   --> src/serialize.rs:89:23
Dec 05 06:55:39.699 INFO [stderr]    |
Dec 05 06:55:39.699 INFO [stderr] 89 |     fn serialize_bool(mut self, v: bool) -> Result<Self::Ok, Self::Error> {
Dec 05 06:55:39.699 INFO [stderr]    |                       ----^^^^
Dec 05 06:55:39.699 INFO [stderr]    |                       |
Dec 05 06:55:39.699 INFO [stderr]    |                       help: remove this `mut`
Dec 05 06:55:39.699 INFO [stderr]    |
Dec 05 06:55:39.699 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 06:55:39.699 INFO [stderr] 
Dec 05 06:55:39.707 INFO [stderr] warning: variable does not need to be mutable
Dec 05 06:55:39.707 INFO [stderr]   --> src/serialize.rs:89:23
Dec 05 06:55:39.707 INFO [stderr]    |
Dec 05 06:55:39.707 INFO [stderr] 89 |     fn serialize_bool(mut self, v: bool) -> Result<Self::Ok, Self::Error> {
Dec 05 06:55:39.707 INFO [stderr]    |                       ----^^^^
Dec 05 06:55:39.707 INFO [stderr]    |                       |
Dec 05 06:55:39.707 INFO [stderr]    |                       help: remove this `mut`
Dec 05 06:55:39.707 INFO [stderr]    |
Dec 05 06:55:39.707 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 06:55:39.707 INFO [stderr] 
Dec 05 06:55:43.405 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.10s
Dec 05 06:55:43.415 INFO [stderr] su: No module specific data is present
Dec 05 06:55:44.065 INFO running `"docker" "inspect" "ced1ea8f156f60bd4bdd2d92f3580340ebf565972b91f131014382866bd9a434"`
Dec 05 06:55:44.369 INFO running `"docker" "rm" "-f" "ced1ea8f156f60bd4bdd2d92f3580340ebf565972b91f131014382866bd9a434"`
Dec 05 06:55:44.715 INFO [stdout] ced1ea8f156f60bd4bdd2d92f3580340ebf565972b91f131014382866bd9a434