[INFO] fetching crate dubble 0.1.0...
[INFO] testing dubble-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate dubble 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate dubble 0.1.0 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 dubble 0.1.0
[INFO] finished tweaking crates.io crate dubble 0.1.0
[INFO] tweaked toml for crates.io crate dubble 0.1.0 written to /workspace/builds/worker-6/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 7f1654fb7e1f2d4af4ecf085b4e2b63e001a741c2627ca20dda7b0c3fa606fcc
[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" "7f1654fb7e1f2d4af4ecf085b4e2b63e001a741c2627ca20dda7b0c3fa606fcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f1654fb7e1f2d4af4ecf085b4e2b63e001a741c2627ca20dda7b0c3fa606fcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f1654fb7e1f2d4af4ecf085b4e2b63e001a741c2627ca20dda7b0c3fa606fcc", kill_on_drop: false }`
[INFO] [stdout] 7f1654fb7e1f2d4af4ecf085b4e2b63e001a741c2627ca20dda7b0c3fa606fcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stdout] 2523e41939ef0ce629cc9262b7de96eb40723f1365455866919f46018b7a2b37
[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" "2523e41939ef0ce629cc9262b7de96eb40723f1365455866919f46018b7a2b37", kill_on_drop: false }`
[INFO] [stderr]    Compiling dubble v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "2523e41939ef0ce629cc9262b7de96eb40723f1365455866919f46018b7a2b37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2523e41939ef0ce629cc9262b7de96eb40723f1365455866919f46018b7a2b37", kill_on_drop: false }`
[INFO] [stdout] 2523e41939ef0ce629cc9262b7de96eb40723f1365455866919f46018b7a2b37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] a8dc4e1cf9ccb6ae3dd288c932abcb88680f288a615508dfff809f4e54488310
[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" "a8dc4e1cf9ccb6ae3dd288c932abcb88680f288a615508dfff809f4e54488310", kill_on_drop: false }`
[INFO] [stderr]    Compiling dubble v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "a8dc4e1cf9ccb6ae3dd288c932abcb88680f288a615508dfff809f4e54488310", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8dc4e1cf9ccb6ae3dd288c932abcb88680f288a615508dfff809f4e54488310", kill_on_drop: false }`
[INFO] [stdout] a8dc4e1cf9ccb6ae3dd288c932abcb88680f288a615508dfff809f4e54488310
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 65544e95d84f23cc151572a729231eb72f3d92bffb32a569d0d6c36859274d0d
[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" "65544e95d84f23cc151572a729231eb72f3d92bffb32a569d0d6c36859274d0d", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/dubble-8e18f908c4e8f1f7
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::basic_int ... ok
[INFO] [stdout] test tests::basic_string ... ok
[INFO] [stdout] test tests::vec_i32 ... ok
[INFO] [stdout] test tests::basic_int_using_deref ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests dubble
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/lib.rs - (line 12) ... ok
[INFO] [stdout] test src/lib.rs - (line 65) ... ok
[INFO] [stdout] test src/lib.rs - (line 77) ... ok
[INFO] [stdout] test src/lib.rs - (line 18) ... ok
[INFO] [stdout] test src/lib.rs - (line 25) ... ok
[INFO] [stdout] test src/lib.rs - DoubleBuffered<T>::write (line 147) ... ok
[INFO] [stdout] test src/lib.rs - DoubleBuffered<T>::write (line 156) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.38s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "65544e95d84f23cc151572a729231eb72f3d92bffb32a569d0d6c36859274d0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65544e95d84f23cc151572a729231eb72f3d92bffb32a569d0d6c36859274d0d", kill_on_drop: false }`
[INFO] [stdout] 65544e95d84f23cc151572a729231eb72f3d92bffb32a569d0d6c36859274d0d