[INFO] cloning repository https://github.com/collinsmith/rust-by-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/collinsmith/rust-by-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcollinsmith%2Frust-by-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcollinsmith%2Frust-by-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a198148af655a4d5fbd1b4fe7bd16c046395606b
[INFO] testing collinsmith/rust-by-example against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcollinsmith%2Frust-by-example" "/workspace/builds/worker-71/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-71/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/collinsmith/rust-by-example on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/collinsmith/rust-by-example
[INFO] finished tweaking git repo https://github.com/collinsmith/rust-by-example
[INFO] tweaked toml for git repo https://github.com/collinsmith/rust-by-example written to /workspace/builds/worker-71/source/Cargo.toml
[INFO] crate git repo https://github.com/collinsmith/rust-by-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3871658d016fb956231f2b19e4c395aa83d024a73a6d7ef7ba841bbf2b7873b8
[INFO] running `Command { std: "docker" "start" "-a" "3871658d016fb956231f2b19e4c395aa83d024a73a6d7ef7ba841bbf2b7873b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3871658d016fb956231f2b19e4c395aa83d024a73a6d7ef7ba841bbf2b7873b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3871658d016fb956231f2b19e4c395aa83d024a73a6d7ef7ba841bbf2b7873b8", kill_on_drop: false }`
[INFO] [stdout] 3871658d016fb956231f2b19e4c395aa83d024a73a6d7ef7ba841bbf2b7873b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 809853a8b632e1c74be34032c37769ce3dc7089c23ba9369f4a1c6015a53a2db
[INFO] running `Command { std: "docker" "start" "-a" "809853a8b632e1c74be34032c37769ce3dc7089c23ba9369f4a1c6015a53a2db", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling hello-world v0.1.0 (/opt/rustwide/workdir/1-0-hello-world)
[INFO] [stderr]    Compiling formatting v0.1.0 (/opt/rustwide/workdir/1-2-3-formatting)
[INFO] [stderr]    Compiling formatted-print v0.1.0 (/opt/rustwide/workdir/1-2-0-formatted-print)
[INFO] [stderr]    Compiling casting v0.1.0 (/opt/rustwide/workdir/5-1-casting)
[INFO] [stderr]    Compiling debug v0.1.0 (/opt/rustwide/workdir/1-2-1-debug)
[INFO] [stderr]    Compiling arrays_and_slices v0.1.0 (/opt/rustwide/workdir/2-3-arrays_and_slices)
[INFO] [stderr]    Compiling enums v0.1.0 (/opt/rustwide/workdir/3-2-0-enums)
[INFO] [stderr]    Compiling comments v0.1.0 (/opt/rustwide/workdir/1-1-0-comments)
[INFO] [stderr]    Compiling tuples v0.1.0 (/opt/rustwide/workdir/2-2-tuples)
[INFO] [stderr]    Compiling display v0.1.0 (/opt/rustwide/workdir/1-2-2-display)
[INFO] [stderr]    Compiling linked_list v0.1.0 (/opt/rustwide/workdir/3-2-3-linked_list)
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> 1-2-1-debug/src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         name: &'a str,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]   --> 1-2-1-debug/src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         age: u8
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "809853a8b632e1c74be34032c37769ce3dc7089c23ba9369f4a1c6015a53a2db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "809853a8b632e1c74be34032c37769ce3dc7089c23ba9369f4a1c6015a53a2db", kill_on_drop: false }`
[INFO] [stdout] 809853a8b632e1c74be34032c37769ce3dc7089c23ba9369f4a1c6015a53a2db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57ab33054a3d33e127329f86e726534a6c25e14d2fddcad77b95d84a5419dd51
[INFO] running `Command { std: "docker" "start" "-a" "57ab33054a3d33e127329f86e726534a6c25e14d2fddcad77b95d84a5419dd51", kill_on_drop: false }`
[INFO] [stderr]    Compiling linked_list v0.1.0 (/opt/rustwide/workdir/3-2-3-linked_list)
[INFO] [stderr]    Compiling formatting v0.1.0 (/opt/rustwide/workdir/1-2-3-formatting)
[INFO] [stderr]    Compiling casting v0.1.0 (/opt/rustwide/workdir/5-1-casting)
[INFO] [stderr]    Compiling display v0.1.0 (/opt/rustwide/workdir/1-2-2-display)
[INFO] [stderr]    Compiling comments v0.1.0 (/opt/rustwide/workdir/1-1-0-comments)
[INFO] [stderr]    Compiling tuples v0.1.0 (/opt/rustwide/workdir/2-2-tuples)
[INFO] [stderr]    Compiling enums v0.1.0 (/opt/rustwide/workdir/3-2-0-enums)
[INFO] [stderr]    Compiling arrays_and_slices v0.1.0 (/opt/rustwide/workdir/2-3-arrays_and_slices)
[INFO] [stderr]    Compiling hello-world v0.1.0 (/opt/rustwide/workdir/1-0-hello-world)
[INFO] [stderr]    Compiling debug v0.1.0 (/opt/rustwide/workdir/1-2-1-debug)
[INFO] [stderr]    Compiling formatted-print v0.1.0 (/opt/rustwide/workdir/1-2-0-formatted-print)
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> 1-2-1-debug/src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         name: &'a str,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]   --> 1-2-1-debug/src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         age: u8
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.90s
[INFO] running `Command { std: "docker" "inspect" "57ab33054a3d33e127329f86e726534a6c25e14d2fddcad77b95d84a5419dd51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57ab33054a3d33e127329f86e726534a6c25e14d2fddcad77b95d84a5419dd51", kill_on_drop: false }`
[INFO] [stdout] 57ab33054a3d33e127329f86e726534a6c25e14d2fddcad77b95d84a5419dd51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ebaad8d76c85a317be4ea229e3a828a28c25bd02089d979d94b28225756afc0b
[INFO] running `Command { std: "docker" "start" "-a" "ebaad8d76c85a317be4ea229e3a828a28c25bd02089d979d94b28225756afc0b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: field is never read: `name`
[INFO] [stderr]   --> 1-2-1-debug/src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         name: &'a str,
[INFO] [stderr]    |         ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `age`
[INFO] [stderr]   --> 1-2-1-debug/src/main.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         age: u8
[INFO] [stderr]    |         ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `debug` (bin "debug" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.43s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/arrays_and_slices-383e4cfd16df0688)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/casting-0d93a2edb859c262)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/comments-0b150a36f6497816)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/debug-b82627d77f5dd373)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/display-9161172503a66c4e)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/enums-d019566dbb53575f)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/formatted_print-a0bd8a8ac729e3f7)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/formatting-f6dadd7781916c17)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hello_world-a83513796efdb7e0)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::hello_world_asymmetric ... ok
[INFO] [stdout] test tests::hello_world_identity ... ok
[INFO] [stdout] test tests::hello_world_symmetric ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/linked_list-bbec9b1c99e44fa0)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tuples-4dc29742c973c161)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ebaad8d76c85a317be4ea229e3a828a28c25bd02089d979d94b28225756afc0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebaad8d76c85a317be4ea229e3a828a28c25bd02089d979d94b28225756afc0b", kill_on_drop: false }`
[INFO] [stdout] ebaad8d76c85a317be4ea229e3a828a28c25bd02089d979d94b28225756afc0b