[INFO] fetching crate quad-wasmnastics 0.3.0...
[INFO] checking quad-wasmnastics-0.3.0 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate quad-wasmnastics 0.3.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate quad-wasmnastics 0.3.0 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate quad-wasmnastics 0.3.0
[INFO] finished tweaking crates.io crate quad-wasmnastics 0.3.0
[INFO] tweaked toml for crates.io crate quad-wasmnastics 0.3.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate quad-wasmnastics 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a8f4ec240228658b15a4a0d525faa3723e9b6941df244fe9f31b24ebcbb6f7d
[INFO] running `Command { std: "docker" "start" "-a" "3a8f4ec240228658b15a4a0d525faa3723e9b6941df244fe9f31b24ebcbb6f7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a8f4ec240228658b15a4a0d525faa3723e9b6941df244fe9f31b24ebcbb6f7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a8f4ec240228658b15a4a0d525faa3723e9b6941df244fe9f31b24ebcbb6f7d", kill_on_drop: false }`
[INFO] [stdout] 3a8f4ec240228658b15a4a0d525faa3723e9b6941df244fe9f31b24ebcbb6f7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bdef8779fbd36894cfc38562b64c851536a8ea4448bf5b2184b65aea22c3c8e
[INFO] running `Command { std: "docker" "start" "-a" "6bdef8779fbd36894cfc38562b64c851536a8ea4448bf5b2184b65aea22c3c8e", kill_on_drop: false }`
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[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> examples/clipboardinator.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for struct `Vec<Waiter<()>>` in the current scope
[INFO] [stdout]   --> examples/clipboardinator.rs:38:14
[INFO] [stdout]    |
[INFO] [stdout] 36 | /         copy_queue
[INFO] [stdout] 37 | |             // remove it if it's some
[INFO] [stdout] 38 | |             .drain_filter(|waiter| {
[INFO] [stdout]    | |             -^^^^^^^^^^^^ method not found in `Vec<Waiter<()>>`
[INFO] [stdout]    | |_____________|
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for struct `Vec<Waiter<std::string::String>>` in the current scope
[INFO] [stdout]   --> examples/clipboardinator.rs:53:14
[INFO] [stdout]    |
[INFO] [stdout] 52 | /         paste_queue
[INFO] [stdout] 53 | |             .drain_filter(|waiter| {
[INFO] [stdout]    | |             -^^^^^^^^^^^^ method not found in `Vec<Waiter<String>>`
[INFO] [stdout]    | |_____________|
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `quad-wasmnastics` (example "clipboardinator") due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "6bdef8779fbd36894cfc38562b64c851536a8ea4448bf5b2184b65aea22c3c8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bdef8779fbd36894cfc38562b64c851536a8ea4448bf5b2184b65aea22c3c8e", kill_on_drop: false }`
[INFO] [stdout] 6bdef8779fbd36894cfc38562b64c851536a8ea4448bf5b2184b65aea22c3c8e