[INFO] updating cached repository alyjak/distributed-chat
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alyjak/distributed-chat
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alyjak/distributed-chat" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/alyjak/distributed-chat"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/alyjak/distributed-chat'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alyjak/distributed-chat" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/alyjak/distributed-chat"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/alyjak/distributed-chat'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 100050eb8b2a9e91ccdc97cb89ac857cafdad61b
[INFO] sha for GitHub repo alyjak/distributed-chat: 100050eb8b2a9e91ccdc97cb89ac857cafdad61b
[INFO] validating manifest of alyjak/distributed-chat on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of alyjak/distributed-chat on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing alyjak/distributed-chat
[INFO] finished frobbing alyjak/distributed-chat
[INFO] frobbed toml for alyjak/distributed-chat written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/alyjak/distributed-chat/Cargo.toml
[INFO] started frobbing alyjak/distributed-chat
[INFO] finished frobbing alyjak/distributed-chat
[INFO] frobbed toml for alyjak/distributed-chat written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/alyjak/distributed-chat/Cargo.toml
[INFO] crate alyjak/distributed-chat has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing alyjak/distributed-chat against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/alyjak/distributed-chat:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] e100bbc6f6f44837188721be60da63a624a1ed51a97d1b39937046d7f559a32a
[INFO] running `"docker" "start" "-a" "e100bbc6f6f44837188721be60da63a624a1ed51a97d1b39937046d7f559a32a"`
[INFO] [stderr]    Compiling assignment v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/message.rs:226:9
[INFO] [stderr]     |
[INFO] [stderr] 226 | /         write!(
[INFO] [stderr] 227 | |             f,
[INFO] [stderr] 228 | |             "[{} {}]",
[INFO] [stderr] 229 | |             unsafe { from_utf8_unchecked(&self.from[..]) },
[INFO] [stderr] 230 | |             self.typ
[INFO] [stderr] 231 | |         );
[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]    --> src/message.rs:235:17
[INFO] [stderr]     |
[INFO] [stderr] 235 |                 write!(f, ": {}", unsafe { from_utf8_unchecked(&self.content[..]) });
[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 8.55s
[INFO] running `"docker" "inspect" "e100bbc6f6f44837188721be60da63a624a1ed51a97d1b39937046d7f559a32a"`
[INFO] running `"docker" "rm" "-f" "e100bbc6f6f44837188721be60da63a624a1ed51a97d1b39937046d7f559a32a"`
[INFO] [stdout] e100bbc6f6f44837188721be60da63a624a1ed51a97d1b39937046d7f559a32a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/alyjak/distributed-chat:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 49d36e14c306df0d7a6f0d6dd39533e2b4db6cc87f0af360c66eb3c539f8eae6
[INFO] running `"docker" "start" "-a" "49d36e14c306df0d7a6f0d6dd39533e2b4db6cc87f0af360c66eb3c539f8eae6"`
[INFO] [stderr]    Compiling assignment v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/message.rs:226:9
[INFO] [stderr]     |
[INFO] [stderr] 226 | /         write!(
[INFO] [stderr] 227 | |             f,
[INFO] [stderr] 228 | |             "[{} {}]",
[INFO] [stderr] 229 | |             unsafe { from_utf8_unchecked(&self.from[..]) },
[INFO] [stderr] 230 | |             self.typ
[INFO] [stderr] 231 | |         );
[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]    --> src/message.rs:235:17
[INFO] [stderr]     |
[INFO] [stderr] 235 |                 write!(f, ": {}", unsafe { from_utf8_unchecked(&self.content[..]) });
[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 2.53s
[INFO] running `"docker" "inspect" "49d36e14c306df0d7a6f0d6dd39533e2b4db6cc87f0af360c66eb3c539f8eae6"`
[INFO] running `"docker" "rm" "-f" "49d36e14c306df0d7a6f0d6dd39533e2b4db6cc87f0af360c66eb3c539f8eae6"`
[INFO] [stdout] 49d36e14c306df0d7a6f0d6dd39533e2b4db6cc87f0af360c66eb3c539f8eae6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/alyjak/distributed-chat:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] ffd2184c00446713c1baf0ce959d272f17473f53ba5a992f3ae85c495dda9ed7
[INFO] running `"docker" "start" "-a" "ffd2184c00446713c1baf0ce959d272f17473f53ba5a992f3ae85c495dda9ed7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/assignment-da891a6ad6dfd809
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/assignment-30d7e9437fc33db4
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests assignment
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "ffd2184c00446713c1baf0ce959d272f17473f53ba5a992f3ae85c495dda9ed7"`
[INFO] running `"docker" "rm" "-f" "ffd2184c00446713c1baf0ce959d272f17473f53ba5a992f3ae85c495dda9ed7"`
[INFO] [stdout] ffd2184c00446713c1baf0ce959d272f17473f53ba5a992f3ae85c495dda9ed7