[INFO] cloning repository https://github.com/aeolus3000/hello_world_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aeolus3000/hello_world_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faeolus3000%2Fhello_world_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faeolus3000%2Fhello_world_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a67d550a87f08bc6b18337420c79384cc915ab08
[INFO] testing aeolus3000/hello_world_rust against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faeolus3000%2Fhello_world_rust" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aeolus3000/hello_world_rust on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aeolus3000/hello_world_rust
[INFO] finished tweaking git repo https://github.com/aeolus3000/hello_world_rust
[INFO] tweaked toml for git repo https://github.com/aeolus3000/hello_world_rust written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/aeolus3000/hello_world_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a73f441ab32b5fabafb5b75c549977d852fa2ba4f2ac28ace9156d786dbf0f8
[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" "3a73f441ab32b5fabafb5b75c549977d852fa2ba4f2ac28ace9156d786dbf0f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a73f441ab32b5fabafb5b75c549977d852fa2ba4f2ac28ace9156d786dbf0f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a73f441ab32b5fabafb5b75c549977d852fa2ba4f2ac28ace9156d786dbf0f8", kill_on_drop: false }`
[INFO] [stdout] 3a73f441ab32b5fabafb5b75c549977d852fa2ba4f2ac28ace9156d786dbf0f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4518768502a34b2f7b7603350ac7cc75dc93efb7f679dd31bed588e826c44e3
[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" "a4518768502a34b2f7b7603350ac7cc75dc93efb7f679dd31bed588e826c44e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_stack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let f = File::open("hello.txt")?;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a4518768502a34b2f7b7603350ac7cc75dc93efb7f679dd31bed588e826c44e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4518768502a34b2f7b7603350ac7cc75dc93efb7f679dd31bed588e826c44e3", kill_on_drop: false }`
[INFO] [stdout] a4518768502a34b2f7b7603350ac7cc75dc93efb7f679dd31bed588e826c44e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9addae744b9a0c00d44d729451e978bd72b89d95e6e910d2c17621a895cb3e44
[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" "9addae744b9a0c00d44d729451e978bd72b89d95e6e910d2c17621a895cb3e44", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_stack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let f = File::open("hello.txt")?;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` 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 1.16s
[INFO] running `Command { std: "docker" "inspect" "9addae744b9a0c00d44d729451e978bd72b89d95e6e910d2c17621a895cb3e44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9addae744b9a0c00d44d729451e978bd72b89d95e6e910d2c17621a895cb3e44", kill_on_drop: false }`
[INFO] [stdout] 9addae744b9a0c00d44d729451e978bd72b89d95e6e910d2c17621a895cb3e44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7c3601016b6bcfec0c4ebd49d6598ce655d5c60e4e2edc25e0be4faf8333ed4e
[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" "7c3601016b6bcfec0c4ebd49d6598ce655d5c60e4e2edc25e0be4faf8333ed4e", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stdout] running 14 tests
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stdout] test utils::piglatin::piglatin_test::an_empty_string_should_not_be_a_problem ... ok
[INFO] [stderr]   |
[INFO] [stdout] test utils::piglatin::piglatin_test::non_letter_starting_string_should_not_be_converted_to_pig_latin ... ok
[INFO] [stderr] 7 |     let f = File::open("hello.txt")?;
[INFO] [stdout] test utils::piglatin::piglatin_test::vocal_starting_string_should_be_converted_to_pig_latin ... ok
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] test utils::stack::stack_test::popping_from_stack_should_return_correct_value ... ok
[INFO] [stderr]   |
[INFO] [stdout] test utils::stack::stack_test::pushing_on_stack_should_be_visible_in_buffer ... ok
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] test utils::stack::stack_test::popping_from_stack_should_decrement_pointer ... ok
[INFO] [stderr] 
[INFO] [stdout] test utils::stack::stack_test::pushing_once_in_the_stack_results_in_expected_size ... ok
[INFO] [stderr] warning: `rust_stack` (bin "rust_stack" test) generated 1 warning
[INFO] [stdout] test utils::stack::stack_test::pushing_on_stack_should_increment_pointer ... ok
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] test utils::stack::stack_test::stack_is_empty_should_return_empty_state ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_stack-8b8a3860f5616205)
[INFO] [stdout] test utils::stack::stack_test::stack_is_full_should_return_full_state ... ok
[INFO] [stdout] test utils::stack::stack_test::stack_pop_should_return_error_when_empty ... ok
[INFO] [stdout] test utils::stack::stack_test::a_new_stack_should_be_empty ... ok
[INFO] [stdout] test utils::piglatin::piglatin_test::consonant_string_should_be_converted_to_pig_latin ... ok
[INFO] [stdout] test utils::stack::stack_test::stack_push_should_return_error_when_full ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_stack-fe9ec5687b3bfa81)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_stack
[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] running `Command { std: "docker" "inspect" "7c3601016b6bcfec0c4ebd49d6598ce655d5c60e4e2edc25e0be4faf8333ed4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c3601016b6bcfec0c4ebd49d6598ce655d5c60e4e2edc25e0be4faf8333ed4e", kill_on_drop: false }`
[INFO] [stdout] 7c3601016b6bcfec0c4ebd49d6598ce655d5c60e4e2edc25e0be4faf8333ed4e