[INFO] fetching crate testfile 0.0.2...
[INFO] testing testfile-0.0.2 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate testfile 0.0.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate testfile 0.0.2 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate testfile 0.0.2
[INFO] finished tweaking crates.io crate testfile 0.0.2
[INFO] tweaked toml for crates.io crate testfile 0.0.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rstest v0.6.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2b3064f53f41e6be4a033844ba75fdfa5dd89c4bf8d5d5bb2b3a23fd0e63ba3
[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" "d2b3064f53f41e6be4a033844ba75fdfa5dd89c4bf8d5d5bb2b3a23fd0e63ba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2b3064f53f41e6be4a033844ba75fdfa5dd89c4bf8d5d5bb2b3a23fd0e63ba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2b3064f53f41e6be4a033844ba75fdfa5dd89c4bf8d5d5bb2b3a23fd0e63ba3", kill_on_drop: false }`
[INFO] [stdout] d2b3064f53f41e6be4a033844ba75fdfa5dd89c4bf8d5d5bb2b3a23fd0e63ba3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "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] a8a39bf7e9094b6a26a5c2dc3b71d7e58f34deb4dcaacc1928ef2b1c813c504c
[INFO] running `Command { std: "docker" "start" "-a" "a8a39bf7e9094b6a26a5c2dc3b71d7e58f34deb4dcaacc1928ef2b1c813c504c", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling testfile v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.01s
[INFO] running `Command { std: "docker" "inspect" "a8a39bf7e9094b6a26a5c2dc3b71d7e58f34deb4dcaacc1928ef2b1c813c504c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8a39bf7e9094b6a26a5c2dc3b71d7e58f34deb4dcaacc1928ef2b1c813c504c", kill_on_drop: false }`
[INFO] [stdout] a8a39bf7e9094b6a26a5c2dc3b71d7e58f34deb4dcaacc1928ef2b1c813c504c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0aba7bba24a9c5abacdeb83f5dac7f0ec7df6d8110a90aeeb6561e3c951f4f6a
[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" "0aba7bba24a9c5abacdeb83f5dac7f0ec7df6d8110a90aeeb6561e3c951f4f6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling rstest v0.6.4
[INFO] [stderr]    Compiling testfile v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/./lib_tests.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let mut f = std::fs::File::open(&tf.path);
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/./lib_tests.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let mut f = std::fs::File::open(&tf.path);
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 26.23s
[INFO] running `Command { std: "docker" "inspect" "0aba7bba24a9c5abacdeb83f5dac7f0ec7df6d8110a90aeeb6561e3c951f4f6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aba7bba24a9c5abacdeb83f5dac7f0ec7df6d8110a90aeeb6561e3c951f4f6a", kill_on_drop: false }`
[INFO] [stdout] 0aba7bba24a9c5abacdeb83f5dac7f0ec7df6d8110a90aeeb6561e3c951f4f6a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d9be5da5a16ba797f48f950b8a7920cb1231e2f8b1e8d1b004057bbefb292d85
[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" "d9be5da5a16ba797f48f950b8a7920cb1231e2f8b1e8d1b004057bbefb292d85", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/./lib_tests.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let mut f = std::fs::File::open(&tf.path);
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/./lib_tests.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let mut f = std::fs::File::open(&tf.path);
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/testfile-a04b995d3d789334
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stderr]    Doc-tests testfile
[INFO] [stdout] test tests::deref::canBeReferencedAsFile ... ok
[INFO] [stdout] test tests::deref::canBeReferencedAsPathBuf ... ok
[INFO] [stdout] test tests::deref::canBeReferencedAsRead ... ok
[INFO] [stdout] test tests::deref::canBeReferencedAsMutableTestFile ... ok
[INFO] [stdout] test tests::deref::canBeDereferencedAsFile ... ok
[INFO] [stdout] test tests::deref::canBeReferencedAsPath ... ok
[INFO] [stdout] test tests::deref::canBeReferencedAsWritableFile ... ok
[INFO] [stdout] test tests::deref::canBeDereferencedAsWritableFile ... ok
[INFO] [stdout] test tests::deref::canBeReferencedAsWrite ... ok
[INFO] [stdout] test tests::testEmptyFile ... ok
[INFO] [stdout] test tests::testFileCleanup ... ok
[INFO] [stdout] test tests::testFromStr ... ok
[INFO] [stdout] test tests::flushTest ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[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" "d9be5da5a16ba797f48f950b8a7920cb1231e2f8b1e8d1b004057bbefb292d85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9be5da5a16ba797f48f950b8a7920cb1231e2f8b1e8d1b004057bbefb292d85", kill_on_drop: false }`
[INFO] [stdout] d9be5da5a16ba797f48f950b8a7920cb1231e2f8b1e8d1b004057bbefb292d85