[INFO] updating cached repository tarka/xcp
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tarka/xcp
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tarka/xcp" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/tarka/xcp"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/tarka/xcp'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tarka/xcp" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/tarka/xcp"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/tarka/xcp'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7cfb8cba9503f6ccea8f4d8e4a57ecb70f2ba4e1
[INFO] sha for GitHub repo tarka/xcp: 7cfb8cba9503f6ccea8f4d8e4a57ecb70f2ba4e1
[INFO] validating manifest of tarka/xcp on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tarka/xcp on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tarka/xcp
[INFO] finished frobbing tarka/xcp
[INFO] frobbed toml for tarka/xcp written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/tarka/xcp/Cargo.toml
[INFO] started frobbing tarka/xcp
[INFO] finished frobbing tarka/xcp
[INFO] frobbed toml for tarka/xcp written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/tarka/xcp/Cargo.toml
[INFO] crate tarka/xcp has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking tarka/xcp against try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-5/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/tarka/xcp:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 715d1e15024b24a342940c3908b74ada2a7c7c36c43e773700f01de4a59f07d1
[INFO] running `"docker" "start" "-a" "715d1e15024b24a342940c3908b74ada2a7c7c36c43e773700f01de4a59f07d1"`
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling escargot v0.3.1
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking log v0.4.5
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking term v0.5.1
[INFO] [stderr]    Compiling syn v0.15.13
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking globset v0.4.2
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stderr]     Checking ignore v0.4.4
[INFO] [stderr]     Checking indicatif v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling synstructure v0.10.0
[INFO] [stderr]    Compiling structopt-derive v0.2.12
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]     Checking structopt v0.2.12
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking xcp v0.1.1-alpha.3 (/opt/crater/workdir)
[INFO] [stderr]     Checking serde_json v1.0.32
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> tests/lib.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     write!(&file, "{}", text);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[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)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> tests/lib.rs:79:5
[INFO] [stderr]    |
[INFO] [stderr] 79 |     write!(fd, "{}", data);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[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)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> tests/lib.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     write!(fd, "{}", data);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[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)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> tests/lib.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     write!(fd, "{}", data);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[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)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.10s
[INFO] running `"docker" "inspect" "715d1e15024b24a342940c3908b74ada2a7c7c36c43e773700f01de4a59f07d1"`
[INFO] running `"docker" "rm" "-f" "715d1e15024b24a342940c3908b74ada2a7c7c36c43e773700f01de4a59f07d1"`
[INFO] [stdout] 715d1e15024b24a342940c3908b74ada2a7c7c36c43e773700f01de4a59f07d1