Dec 11 15:43:45.890 INFO checking kbacha/json_serde_test against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 15:43:45.891 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 15:43:46.186 INFO [stdout] 081c222f93bd50c6570ce71d3569b4bd34871862d38596b5214e6fa4b04c2856
Dec 11 15:43:46.192 INFO running `"docker" "start" "-a" "081c222f93bd50c6570ce71d3569b4bd34871862d38596b5214e6fa4b04c2856"`
Dec 11 15:43:46.742 INFO [stderr] usermod: no changes
Dec 11 15:43:46.816 INFO [stderr]     Checking json_testing v0.1.0 (/source)
Dec 11 15:43:47.436 INFO [stderr] warning: unused import: `Read`
Dec 11 15:43:47.436 INFO [stderr]  --> src/main.rs:7:21
Dec 11 15:43:47.436 INFO [stderr]   |
Dec 11 15:43:47.436 INFO [stderr] 7 | use std::io::{self, Read};
Dec 11 15:43:47.436 INFO [stderr]   |                     ^^^^
Dec 11 15:43:47.436 INFO [stderr]   |
Dec 11 15:43:47.436 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 15:43:47.436 INFO [stderr] 
Dec 11 15:43:47.476 INFO [stderr] warning: unused import: `Read`
Dec 11 15:43:47.476 INFO [stderr]  --> src/main.rs:7:21
Dec 11 15:43:47.476 INFO [stderr]   |
Dec 11 15:43:47.476 INFO [stderr] 7 | use std::io::{self, Read};
Dec 11 15:43:47.476 INFO [stderr]   |                     ^^^^
Dec 11 15:43:47.476 INFO [stderr]   |
Dec 11 15:43:47.476 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 15:43:47.476 INFO [stderr] 
Dec 11 15:43:47.624 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
Dec 11 15:43:47.625 INFO [stderr] su: No module specific data is present
Dec 11 15:43:47.983 INFO running `"docker" "inspect" "081c222f93bd50c6570ce71d3569b4bd34871862d38596b5214e6fa4b04c2856"`
Dec 11 15:43:48.082 INFO running `"docker" "rm" "-f" "081c222f93bd50c6570ce71d3569b4bd34871862d38596b5214e6fa4b04c2856"`
Dec 11 15:43:48.232 INFO [stdout] 081c222f93bd50c6570ce71d3569b4bd34871862d38596b5214e6fa4b04c2856