[INFO] fetching crate ioslice 0.5.1...
[INFO] testing ioslice-0.5.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate ioslice 0.5.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate ioslice 0.5.1 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ioslice 0.5.1
[INFO] finished tweaking crates.io crate ioslice 0.5.1
[INFO] tweaked toml for crates.io crate ioslice 0.5.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66f41fd431326126e8d62443c9200dbd38d1696a46a6f61d25ce6294521c193d
[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" "66f41fd431326126e8d62443c9200dbd38d1696a46a6f61d25ce6294521c193d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66f41fd431326126e8d62443c9200dbd38d1696a46a6f61d25ce6294521c193d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66f41fd431326126e8d62443c9200dbd38d1696a46a6f61d25ce6294521c193d", kill_on_drop: false }`
[INFO] [stdout] 66f41fd431326126e8d62443c9200dbd38d1696a46a6f61d25ce6294521c193d
[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" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 547bea6109a6ff41d78ff9ce1b8da8fbdcf30e07f78481d35366fb5b624ea2de
[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" "547bea6109a6ff41d78ff9ce1b8da8fbdcf30e07f78481d35366fb5b624ea2de", kill_on_drop: false }`
[INFO] [stderr]    Compiling ioslice v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "547bea6109a6ff41d78ff9ce1b8da8fbdcf30e07f78481d35366fb5b624ea2de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "547bea6109a6ff41d78ff9ce1b8da8fbdcf30e07f78481d35366fb5b624ea2de", kill_on_drop: false }`
[INFO] [stdout] 547bea6109a6ff41d78ff9ce1b8da8fbdcf30e07f78481d35366fb5b624ea2de
[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" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd29fd8abefba917c62e937c68d03e969b0ebed542e526174b4342b4055311b9
[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" "cd29fd8abefba917c62e937c68d03e969b0ebed542e526174b4342b4055311b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling ioslice v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `Command { std: "docker" "inspect" "cd29fd8abefba917c62e937c68d03e969b0ebed542e526174b4342b4055311b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd29fd8abefba917c62e937c68d03e969b0ebed542e526174b4342b4055311b9", kill_on_drop: false }`
[INFO] [stdout] cd29fd8abefba917c62e937c68d03e969b0ebed542e526174b4342b4055311b9
[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" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 389298bcdc407edc25ee930442be3c5dcf4fb11bc041413d2707288b43036e8c
[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" "389298bcdc407edc25ee930442be3c5dcf4fb11bc041413d2707288b43036e8c", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ioslice-953bcbe83c729192
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test buffer::tests::buffer_parts ... ok
[INFO] [stdout] test tests::abi_compatibility_with_std ... ok
[INFO] [stdout] test tests::splitting_ioslice ... ok
[INFO] [stdout] test tests::abi_compatibility_with_iovec ... ok
[INFO] [stdout] test tests::advance ... ok
[INFO] [stdout] test tests::iobox ... ok
[INFO] [stdout] test tests::partially_init_by_copying ... ok
[INFO] [stdout] test buffer::tests::basic_initialization ... ok
[INFO] [stderr]    Doc-tests ioslice
[INFO] [stdout] test tests::splitting_ioslice_mut ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 21) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "389298bcdc407edc25ee930442be3c5dcf4fb11bc041413d2707288b43036e8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "389298bcdc407edc25ee930442be3c5dcf4fb11bc041413d2707288b43036e8c", kill_on_drop: false }`
[INFO] [stdout] 389298bcdc407edc25ee930442be3c5dcf4fb11bc041413d2707288b43036e8c