[INFO] fetching crate mech-program 0.1.0...
[INFO] checking mech-program-0.1.0 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate mech-program 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate mech-program 0.1.0 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mech-program 0.1.0
[INFO] finished tweaking crates.io crate mech-program 0.1.0
[INFO] tweaked toml for crates.io crate mech-program 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mech-utilities v0.1.0
[INFO] [stderr]   Downloaded websocket v0.26.5
[INFO] [stderr]   Downloaded websocket-base v0.26.5
[INFO] [stderr]   Downloaded nom-unicode v0.3.0
[INFO] [stderr]   Downloaded mech-core v0.1.0
[INFO] [stderr]   Downloaded mech-syntax v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1de10e03e82b235b92d10b9791489581cd87c32dbf41508a51fe6acec162a92
[INFO] running `Command { std: "docker" "start" "-a" "b1de10e03e82b235b92d10b9791489581cd87c32dbf41508a51fe6acec162a92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1de10e03e82b235b92d10b9791489581cd87c32dbf41508a51fe6acec162a92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1de10e03e82b235b92d10b9791489581cd87c32dbf41508a51fe6acec162a92", kill_on_drop: false }`
[INFO] [stdout] b1de10e03e82b235b92d10b9791489581cd87c32dbf41508a51fe6acec162a92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37b9d9b76602f0e17b0cabeef6db5a1dcd42382fdb6c9d92835f808ec40bffa3
[INFO] running `Command { std: "docker" "start" "-a" "37b9d9b76602f0e17b0cabeef6db5a1dcd42382fdb6c9d92835f808ec40bffa3", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling slab v0.4.9
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[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling openssl v0.10.64
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking openssl-probe v0.1.5
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling unicase v2.7.0
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]    Compiling ahash v0.8.11
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[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]    Compiling openssl-sys v0.9.102
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking zerocopy v0.7.32
[INFO] [stderr]     Checking tokio-reactor v0.1.12
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[INFO] [stderr]     Checking gimli v0.28.1
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[INFO] [stderr]     Checking powerfmt v0.2.0
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[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking time-core v0.1.2
[INFO] [stderr]     Checking num-conv v0.1.0
[INFO] [stderr]     Checking safemem v0.3.3
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[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking want v0.2.0
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[INFO] [stderr]    Compiling mime_guess v2.0.4
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[INFO] [stderr]     Checking url v2.5.0
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[INFO] [stderr]     Checking seahash v4.1.0
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[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking mime v0.3.17
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]     Checking encoding_rs v0.8.33
[INFO] [stderr]     Checking colored v2.1.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking libloading v0.7.4
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]     Checking nom-unicode v0.3.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking mech-core v0.1.0
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking tokio-tls v0.2.1
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking websocket-base v0.26.5
[INFO] [stderr]     Checking websocket v0.26.5
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/mech-core-0.1.0/src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for struct `Vec<std::rc::Rc<std::cell::RefCell<block::Block>>>` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/mech-core-0.1.0/src/schedule.rs:41:63
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let ready_blocks: Vec<BlockRef> = self.unscheduled_blocks.drain_filter(|b| b.borrow().state == BlockState::Ready).collect();
[INFO] [stdout]    |                                                               ^^^^^^^^^^^^ method not found in `Vec<Rc<RefCell<Block>>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mech-core` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "37b9d9b76602f0e17b0cabeef6db5a1dcd42382fdb6c9d92835f808ec40bffa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37b9d9b76602f0e17b0cabeef6db5a1dcd42382fdb6c9d92835f808ec40bffa3", kill_on_drop: false }`
[INFO] [stdout] 37b9d9b76602f0e17b0cabeef6db5a1dcd42382fdb6c9d92835f808ec40bffa3
[INFO] checking mech-program-0.1.0 against try#72eda894eb3548c7ba774079ce0afab42958d4ee for pr-121848-1
[INFO] extracting crate mech-program 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate mech-program 0.1.0 on toolchain 72eda894eb3548c7ba774079ce0afab42958d4ee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mech-program 0.1.0
[INFO] finished tweaking crates.io crate mech-program 0.1.0
[INFO] tweaked toml for crates.io crate mech-program 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f662b8a781c47b0d98763bcfb3faca4676f6f6d28b72ce42589a90e2a1720b10
[INFO] running `Command { std: "docker" "start" "-a" "f662b8a781c47b0d98763bcfb3faca4676f6f6d28b72ce42589a90e2a1720b10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f662b8a781c47b0d98763bcfb3faca4676f6f6d28b72ce42589a90e2a1720b10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f662b8a781c47b0d98763bcfb3faca4676f6f6d28b72ce42589a90e2a1720b10", kill_on_drop: false }`
[INFO] [stdout] f662b8a781c47b0d98763bcfb3faca4676f6f6d28b72ce42589a90e2a1720b10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca001bd5fcd77b80b8dbb69b89f1e264b92146e4dca0ced948fd23b6052fcca9
[INFO] running `Command { std: "docker" "start" "-a" "ca001bd5fcd77b80b8dbb69b89f1e264b92146e4dca0ced948fd23b6052fcca9", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling openssl v0.10.64
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking openssl-probe v0.1.5
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]    Compiling unicase v2.7.0
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking percent-encoding v2.3.1
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]    Compiling openssl-sys v0.9.102
[INFO] [stderr]     Checking zerocopy v0.7.32
[INFO] [stderr]     Checking crossbeam-deque v0.7.4
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking form_urlencoded v1.2.1
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking idna v0.5.0
[INFO] [stderr]    Compiling hyper v0.12.36
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]     Checking num-conv v0.1.0
[INFO] [stderr]     Checking opaque-debug v0.2.3
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[INFO] [stderr]     Checking time-core v0.1.2
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[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking sha-1 v0.8.2
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[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking url v2.5.0
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking seahash v4.1.0
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking try_from v0.3.2
[INFO] [stderr]     Checking publicsuffix v1.5.6
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking mime v0.3.17
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]     Checking colored v2.1.0
[INFO] [stderr]     Checking encoding_rs v0.8.33
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking libloading v0.7.4
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking nom-unicode v0.3.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking tokio-tls v0.2.1
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking websocket-base v0.26.5
[INFO] [stderr]     Checking mech-core v0.1.0
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking bincode v1.3.3
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[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/mech-core-0.1.0/src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for struct `Vec<std::rc::Rc<std::cell::RefCell<block::Block>>>` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/mech-core-0.1.0/src/schedule.rs:41:63
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let ready_blocks: Vec<BlockRef> = self.unscheduled_blocks.drain_filter(|b| b.borrow().state == BlockState::Ready).collect();
[INFO] [stdout]    |                                                               ^^^^^^^^^^^^ method not found in `Vec<Rc<RefCell<Block>>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mech-core` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "ca001bd5fcd77b80b8dbb69b89f1e264b92146e4dca0ced948fd23b6052fcca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca001bd5fcd77b80b8dbb69b89f1e264b92146e4dca0ced948fd23b6052fcca9", kill_on_drop: false }`
[INFO] [stdout] ca001bd5fcd77b80b8dbb69b89f1e264b92146e4dca0ced948fd23b6052fcca9
