[INFO] cloning repository https://github.com/panta82/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/panta82/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanta82%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanta82%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 78fa006aefc08630bdd2af66ca81fff556f107fd
[INFO] testing panta82/rust-playground against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanta82%2Frust-playground" "/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/panta82/rust-playground on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/panta82/rust-playground
[INFO] finished tweaking git repo https://github.com/panta82/rust-playground
[INFO] tweaked toml for git repo https://github.com/panta82/rust-playground written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/panta82/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26df256b53d6e7f57a0ccfcaf93b8a376e7e6489ff9f30682da1c53674987088
[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" "26df256b53d6e7f57a0ccfcaf93b8a376e7e6489ff9f30682da1c53674987088", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26df256b53d6e7f57a0ccfcaf93b8a376e7e6489ff9f30682da1c53674987088", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26df256b53d6e7f57a0ccfcaf93b8a376e7e6489ff9f30682da1c53674987088", kill_on_drop: false }`
[INFO] [stdout] 26df256b53d6e7f57a0ccfcaf93b8a376e7e6489ff9f30682da1c53674987088
[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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 39d4fef69c4cd999d197cbe55935b727c60f3007e0c3c35697452f763b0e0dd5
[INFO] running `Command { std: "docker" "start" "-a" "39d4fef69c4cd999d197cbe55935b727c60f3007e0c3c35697452f763b0e0dd5", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `read_to_string_v1`
[INFO] [stdout]   --> src/cat.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn read_to_string_v1(filename: &str) -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 5.34s
[INFO] running `Command { std: "docker" "inspect" "39d4fef69c4cd999d197cbe55935b727c60f3007e0c3c35697452f763b0e0dd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39d4fef69c4cd999d197cbe55935b727c60f3007e0c3c35697452f763b0e0dd5", kill_on_drop: false }`
[INFO] [stdout] 39d4fef69c4cd999d197cbe55935b727c60f3007e0c3c35697452f763b0e0dd5
[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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 253f6102cb5e7d0046a75e2cf5a0754731cc3795a7b3ed6074e4d05cc57a8479
[INFO] running `Command { std: "docker" "start" "-a" "253f6102cb5e7d0046a75e2cf5a0754731cc3795a7b3ed6074e4d05cc57a8479", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `read_to_string_v1`
[INFO] [stdout]   --> src/cat.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn read_to_string_v1(filename: &str) -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 4.47s
[INFO] [stderr]   Executable unittests src/arrays.rs (/opt/rustwide/target/debug/deps/arrays-3ae14142c34c5e03)
[INFO] [stderr]   Executable unittests src/cat.rs (/opt/rustwide/target/debug/deps/cat-01cacdaf5ea1dc33)
[INFO] [stderr]   Executable unittests src/control.rs (/opt/rustwide/target/debug/deps/control-bafe6583030cb9ea)
[INFO] [stderr]   Executable unittests src/fns.rs (/opt/rustwide/target/debug/deps/fns-7923f9e1199602ee)
[INFO] [stderr]   Executable unittests src/hello.rs (/opt/rustwide/target/debug/deps/hello-ec046d284345befb)
[INFO] [stderr]   Executable unittests src/lets.rs (/opt/rustwide/target/debug/deps/lets-391d947593994acf)
[INFO] [stderr]   Executable unittests src/strings.rs (/opt/rustwide/target/debug/deps/strings-6afe84b5fb88e468)
[INFO] [stderr]   Executable unittests src/vectors.rs (/opt/rustwide/target/debug/deps/vectors-776faa22c94059a3)
[INFO] running `Command { std: "docker" "inspect" "253f6102cb5e7d0046a75e2cf5a0754731cc3795a7b3ed6074e4d05cc57a8479", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "253f6102cb5e7d0046a75e2cf5a0754731cc3795a7b3ed6074e4d05cc57a8479", kill_on_drop: false }`
[INFO] [stdout] 253f6102cb5e7d0046a75e2cf5a0754731cc3795a7b3ed6074e4d05cc57a8479
[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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c7cd6f39719eb839e6a8dbafd354d5bb5ef6f813ba3b3c4e235c6ef5b5c09404
[INFO] running `Command { std: "docker" "start" "-a" "c7cd6f39719eb839e6a8dbafd354d5bb5ef6f813ba3b3c4e235c6ef5b5c09404", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `read_to_string_v1`
[INFO] [stderr]   --> src/cat.rs:15:4
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn read_to_string_v1(filename: &str) -> Result<String, io::Error> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `hello_world` (bin "cat" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/arrays.rs (/opt/rustwide/target/debug/deps/arrays-3ae14142c34c5e03)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/cat.rs (/opt/rustwide/target/debug/deps/cat-01cacdaf5ea1dc33)
[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] [stderr]      Running unittests src/control.rs (/opt/rustwide/target/debug/deps/control-bafe6583030cb9ea)
[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 src/fns.rs (/opt/rustwide/target/debug/deps/fns-7923f9e1199602ee)
[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] [stdout] 
[INFO] [stderr]      Running unittests src/hello.rs (/opt/rustwide/target/debug/deps/hello-ec046d284345befb)
[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] [stdout] 
[INFO] [stderr]      Running unittests src/lets.rs (/opt/rustwide/target/debug/deps/lets-391d947593994acf)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/strings.rs (/opt/rustwide/target/debug/deps/strings-6afe84b5fb88e468)
[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 src/vectors.rs (/opt/rustwide/target/debug/deps/vectors-776faa22c94059a3)
[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" "c7cd6f39719eb839e6a8dbafd354d5bb5ef6f813ba3b3c4e235c6ef5b5c09404", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7cd6f39719eb839e6a8dbafd354d5bb5ef6f813ba3b3c4e235c6ef5b5c09404", kill_on_drop: false }`
[INFO] [stdout] c7cd6f39719eb839e6a8dbafd354d5bb5ef6f813ba3b3c4e235c6ef5b5c09404