[INFO] cloning repository https://github.com/limitLiu/learn-rust-by-rust-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/limitLiu/learn-rust-by-rust-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlimitLiu%2Flearn-rust-by-rust-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlimitLiu%2Flearn-rust-by-rust-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2b14b2b71e55287d94a0c259e089c3e31229bab3
[INFO] testing limitLiu/learn-rust-by-rust-book against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlimitLiu%2Flearn-rust-by-rust-book" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/limitLiu/learn-rust-by-rust-book on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/limitLiu/learn-rust-by-rust-book
[INFO] finished tweaking git repo https://github.com/limitLiu/learn-rust-by-rust-book
[INFO] tweaked toml for git repo https://github.com/limitLiu/learn-rust-by-rust-book written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/limitLiu/learn-rust-by-rust-book already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e5479570a1a22c1ae7a5bba23c219b34ca414c64923509aa99dabf5d324540cd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e5479570a1a22c1ae7a5bba23c219b34ca414c64923509aa99dabf5d324540cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e5479570a1a22c1ae7a5bba23c219b34ca414c64923509aa99dabf5d324540cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5479570a1a22c1ae7a5bba23c219b34ca414c64923509aa99dabf5d324540cd", kill_on_drop: false }`
[INFO] [stdout] e5479570a1a22c1ae7a5bba23c219b34ca414c64923509aa99dabf5d324540cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c67ff050fb8d4fe7f4f7f82658ee2affe66a16d829ae77ff681024949a634cc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1c67ff050fb8d4fe7f4f7f82658ee2affe66a16d829ae77ff681024949a634cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, uniform_paths)]
[INFO] [stdout]   |                        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `Command { std: "docker" "inspect" "1c67ff050fb8d4fe7f4f7f82658ee2affe66a16d829ae77ff681024949a634cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c67ff050fb8d4fe7f4f7f82658ee2affe66a16d829ae77ff681024949a634cc", kill_on_drop: false }`
[INFO] [stdout] 1c67ff050fb8d4fe7f4f7f82658ee2affe66a16d829ae77ff681024949a634cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 409215584ef3715af8e5d2d506b002dc17b0eb8c157740a1e4d66f3f6457e607
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "409215584ef3715af8e5d2d506b002dc17b0eb8c157740a1e4d66f3f6457e607", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, uniform_paths)]
[INFO] [stdout]   |                        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "409215584ef3715af8e5d2d506b002dc17b0eb8c157740a1e4d66f3f6457e607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "409215584ef3715af8e5d2d506b002dc17b0eb8c157740a1e4d66f3f6457e607", kill_on_drop: false }`
[INFO] [stdout] 409215584ef3715af8e5d2d506b002dc17b0eb8c157740a1e4d66f3f6457e607
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 46f6eeb2b4f27519435374a0c0cb9463e71fb97da82070a00bda46254df61cb7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "46f6eeb2b4f27519435374a0c0cb9463e71fb97da82070a00bda46254df61cb7", kill_on_drop: false }`
[INFO] [stderr] warning: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:24
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, uniform_paths)]
[INFO] [stderr]   |                        ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/learn_rs-e11ded0788eb5562
[INFO] [stdout] running 7 tests
[INFO] [stdout] test _7_functional_features::_2_iterators::iterator_sum ... ok
[INFO] [stdout] test _7_functional_features::_2_iterators::using_other_iterator_trait_methods ... ok
[INFO] [stdout] test _7_functional_features::_2_iterators::filters_by_size ... ok
[INFO] [stdout] test _7_functional_features::_2_iterators::calling_next_directly ... ok
[INFO] [stdout] test _7_functional_features::_2_iterators::iterator_demonstration ... ok
[INFO] [stdout] test tests::tests::lifetime_syntax ... ok
[INFO] [stdout] test _7_functional_features::_1_closures::call_with_different_values ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "46f6eeb2b4f27519435374a0c0cb9463e71fb97da82070a00bda46254df61cb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46f6eeb2b4f27519435374a0c0cb9463e71fb97da82070a00bda46254df61cb7", kill_on_drop: false }`
[INFO] [stdout] 46f6eeb2b4f27519435374a0c0cb9463e71fb97da82070a00bda46254df61cb7