[INFO] fetching crate qcollect-traits 0.7.4...
[INFO] checking qcollect-traits-0.7.4 against beta for pr-78714
[INFO] extracting crate qcollect-traits 0.7.4 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate qcollect-traits 0.7.4 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate qcollect-traits 0.7.4
[INFO] finished tweaking crates.io crate qcollect-traits 0.7.4
[INFO] tweaked toml for crates.io crate qcollect-traits 0.7.4 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 1a6be1ebf68d78222ce550900b1653520d7a2491026d4fc0d4b40d13b6b0d9a7
[INFO] running `Command { std: "docker" "start" "-a" "1a6be1ebf68d78222ce550900b1653520d7a2491026d4fc0d4b40d13b6b0d9a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a6be1ebf68d78222ce550900b1653520d7a2491026d4fc0d4b40d13b6b0d9a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a6be1ebf68d78222ce550900b1653520d7a2491026d4fc0d4b40d13b6b0d9a7", kill_on_drop: false }`
[INFO] [stdout] 1a6be1ebf68d78222ce550900b1653520d7a2491026d4fc0d4b40d13b6b0d9a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68906367464da7c17e4afc3d371d59df45f6879f59608dee060a4ca45ac80407
[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" "68906367464da7c17e4afc3d371d59df45f6879f59608dee060a4ca45ac80407", kill_on_drop: false }`
[INFO] [stderr]     Checking vec_map v0.3.0
[INFO] [stderr]     Checking qcollect-traits v0.7.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | / #![feature(
[INFO] [stdout] 52 | |     associated_type_defaults,
[INFO] [stdout] 53 | |     collections, 
[INFO] [stdout] 54 | |     collections_bound, 
[INFO] [stdout] 55 | |     btree_range, 
[INFO] [stdout] 56 | |     drain,
[INFO] [stdout] 57 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | / #![feature(
[INFO] [stdout] 52 | |     associated_type_defaults,
[INFO] [stdout] 53 | |     collections, 
[INFO] [stdout] 54 | |     collections_bound, 
[INFO] [stdout] 55 | |     btree_range, 
[INFO] [stdout] 56 | |     drain,
[INFO] [stdout] 57 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function takes 1 argument but 0 arguments were supplied
[INFO] [stdout]   --> src/impls/vec_deque.rs:51:14
[INFO] [stdout]    |
[INFO] [stdout] 51 |         self.drain()
[INFO] [stdout]    |              ^^^^^- supplied 0 arguments
[INFO] [stdout]    |              |
[INFO] [stdout]    |              expected 1 argument
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `qcollect-traits`
[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] [stdout] error[E0061]: this function takes 1 argument but 0 arguments were supplied
[INFO] [stdout]   --> src/impls/vec_deque.rs:51:14
[INFO] [stdout]    |
[INFO] [stdout] 51 |         self.drain()
[INFO] [stdout]    |              ^^^^^- supplied 0 arguments
[INFO] [stdout]    |              |
[INFO] [stdout]    |              expected 1 argument
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "68906367464da7c17e4afc3d371d59df45f6879f59608dee060a4ca45ac80407", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68906367464da7c17e4afc3d371d59df45f6879f59608dee060a4ca45ac80407", kill_on_drop: false }`
[INFO] [stdout] 68906367464da7c17e4afc3d371d59df45f6879f59608dee060a4ca45ac80407