Dec 12 07:44:21.322 INFO checking serde_roundtrip-0.1.0 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 07:44:21.322 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-0/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 12 07:44:21.825 INFO [stdout] 4c40b9865fad92e6a4566a55464e69a0bf449b8b813a53428834b2f5421dbaad
Dec 12 07:44:21.827 INFO running `"docker" "start" "-a" "4c40b9865fad92e6a4566a55464e69a0bf449b8b813a53428834b2f5421dbaad"`
Dec 12 07:44:22.761 INFO [stderr] usermod: no changes
Dec 12 07:44:22.816 INFO [stderr]     Checking serde_roundtrip v0.1.0 (/source)
Dec 12 07:44:22.816 INFO [stderr]    Compiling syn v0.11.11
Dec 12 07:44:28.580 INFO [stderr]    Compiling serde_codegen_internals v0.14.2
Dec 12 07:44:28.580 INFO [stderr]    Compiling serde_roundtrip_derive v0.1.2
Dec 12 07:44:31.316 INFO [stderr]    Compiling serde_derive v0.9.15
Dec 12 07:44:39.184 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.41s
Dec 12 07:44:39.188 INFO [stderr] su: No module specific data is present
Dec 12 07:44:39.510 INFO running `"docker" "inspect" "4c40b9865fad92e6a4566a55464e69a0bf449b8b813a53428834b2f5421dbaad"`
Dec 12 07:44:39.591 INFO running `"docker" "rm" "-f" "4c40b9865fad92e6a4566a55464e69a0bf449b8b813a53428834b2f5421dbaad"`
Dec 12 07:44:39.708 INFO [stdout] 4c40b9865fad92e6a4566a55464e69a0bf449b8b813a53428834b2f5421dbaad