[INFO] fetching crate text-transliterate 2.0.0...
[INFO] testing text-transliterate-2.0.0 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate text-transliterate 2.0.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate text-transliterate 2.0.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate text-transliterate 2.0.0
[INFO] finished tweaking crates.io crate text-transliterate 2.0.0
[INFO] tweaked toml for crates.io crate text-transliterate 2.0.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", 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] e4a8bb8987d9c66a09248410d1df23d4de5d4ab5b4bb91ac990e655c1ecb8917
[INFO] running `Command { std: "docker" "start" "-a" "e4a8bb8987d9c66a09248410d1df23d4de5d4ab5b4bb91ac990e655c1ecb8917", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4a8bb8987d9c66a09248410d1df23d4de5d4ab5b4bb91ac990e655c1ecb8917", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4a8bb8987d9c66a09248410d1df23d4de5d4ab5b4bb91ac990e655c1ecb8917", kill_on_drop: false }`
[INFO] [stdout] e4a8bb8987d9c66a09248410d1df23d4de5d4ab5b4bb91ac990e655c1ecb8917
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa54e7c7bab8a7ac7ae4897b1ef3f4a0789c69937975e31c32f56e85d67f5f6a
[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" "aa54e7c7bab8a7ac7ae4897b1ef3f4a0789c69937975e31c32f56e85d67f5f6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling fastrand v1.4.0
[INFO] [stderr]    Compiling futures-io v0.3.6
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]    Compiling async-task v4.0.2
[INFO] [stderr]    Compiling vec-arena v1.0.0
[INFO] [stderr]    Compiling nb-connect v1.0.2
[INFO] [stderr]    Compiling errno v0.2.6
[INFO] [stderr]    Compiling crossbeam v0.7.3
[INFO] [stderr]    Compiling async-channel v1.5.1
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling futures-lite v1.11.1
[INFO] [stderr]    Compiling polling v2.0.1
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling async-io v1.1.10
[INFO] [stderr]    Compiling async-executor v1.3.0
[INFO] [stderr]    Compiling blocking v1.0.2
[INFO] [stderr]    Compiling async-global-executor v1.4.0
[INFO] [stderr]    Compiling async-std v1.6.5
[INFO] [stderr]    Compiling text-transliterate v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/transliterate_off_thread.rs:169:16
[INFO] [stdout]     |
[INFO] [stdout] 169 |         if let Some(result) = receiver.recv().await {
[INFO] [stdout]     |                ^^^^^^^^^^^^   --------------------- this expression has type `std::result::Result<std::result::Result<String, TransliterationError>, async_std::sync::RecvError>`
[INFO] [stdout]     |                |
[INFO] [stdout]     |                expected enum `std::result::Result`, found enum `Option`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected enum `std::result::Result<std::result::Result<String, TransliterationError>, async_std::sync::RecvError>`
[INFO] [stdout]                found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `text-transliterate`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "aa54e7c7bab8a7ac7ae4897b1ef3f4a0789c69937975e31c32f56e85d67f5f6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa54e7c7bab8a7ac7ae4897b1ef3f4a0789c69937975e31c32f56e85d67f5f6a", kill_on_drop: false }`
[INFO] [stdout] aa54e7c7bab8a7ac7ae4897b1ef3f4a0789c69937975e31c32f56e85d67f5f6a
