Dec 12 07:44:23.038 INFO checking serde_roundtrip-0.1.0 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 07:44:23.038 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 07:44:23.235 INFO [stdout] b57718f026e08081e9689dab3003d3eb1f845800d7f9e48a6a4abbef16aec4c4
Dec 12 07:44:23.238 INFO running `"docker" "start" "-a" "b57718f026e08081e9689dab3003d3eb1f845800d7f9e48a6a4abbef16aec4c4"`
Dec 12 07:44:23.719 INFO [stderr] usermod: no changes
Dec 12 07:44:23.796 INFO [stderr]     Checking serde_roundtrip v0.1.0 (/source)
Dec 12 07:44:23.796 INFO [stderr]    Compiling syn v0.11.11
Dec 12 07:44:29.516 INFO [stderr]    Compiling serde_codegen_internals v0.14.2
Dec 12 07:44:29.516 INFO [stderr]    Compiling serde_roundtrip_derive v0.1.2
Dec 12 07:44:32.636 INFO [stderr]    Compiling serde_derive v0.9.15
Dec 12 07:44:39.802 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.08s
Dec 12 07:44:39.806 INFO [stderr] su: No module specific data is present
Dec 12 07:44:40.095 INFO running `"docker" "inspect" "b57718f026e08081e9689dab3003d3eb1f845800d7f9e48a6a4abbef16aec4c4"`
Dec 12 07:44:40.158 INFO running `"docker" "rm" "-f" "b57718f026e08081e9689dab3003d3eb1f845800d7f9e48a6a4abbef16aec4c4"`
Dec 12 07:44:40.224 INFO [stdout] b57718f026e08081e9689dab3003d3eb1f845800d7f9e48a6a4abbef16aec4c4