[INFO] fetching crate traverse 0.0.12...
[INFO] checking traverse-0.0.12 against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] extracting crate traverse 0.0.12 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate traverse 0.0.12 on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate traverse 0.0.12
[INFO] finished tweaking crates.io crate traverse 0.0.12
[INFO] tweaked toml for crates.io crate traverse 0.0.12 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (num) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "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] cfd0764227be1c06d70c284f37d90af511611f30fbe3b715a182a4657b14ee5d
[INFO] running `Command { std: "docker" "start" "-a" "cfd0764227be1c06d70c284f37d90af511611f30fbe3b715a182a4657b14ee5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cfd0764227be1c06d70c284f37d90af511611f30fbe3b715a182a4657b14ee5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfd0764227be1c06d70c284f37d90af511611f30fbe3b715a182a4657b14ee5d", kill_on_drop: false }`
[INFO] [stdout] cfd0764227be1c06d70c284f37d90af511611f30fbe3b715a182a4657b14ee5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3a1e11ea24c60a1898e43103884df3cf810f317c1d666c6498d094652dd40f0
[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" "b3a1e11ea24c60a1898e43103884df3cf810f317c1d666c6498d094652dd40f0", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (num) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking num-complex v0.3.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking num-bigint v0.3.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking num-rational v0.3.0
[INFO] [stderr]     Checking num v0.3.0
[INFO] [stderr]     Checking traverse v0.0.12 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking quickcheck v0.9.2
[INFO] [stdout] error[E0658]: use of unstable library feature 'array_map'
[INFO] [stdout]   --> src/impls/slice.rs:28:42
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let traversal: Vec<usize> = data.map(|&x| x).collect();
[INFO] [stdout]    |                                          ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #75243 <https://github.com/rust-lang/rust/issues/75243> for more information
[INFO] [stdout]    = help: add `#![feature(array_map)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/impls/slice.rs:28:47
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let traversal: Vec<usize> = data.map(|&x| x).collect();
[INFO] [stdout]    |                                               ^--
[INFO] [stdout]    |                                               ||
[INFO] [stdout]    |                                               |expected due to this
[INFO] [stdout]    |                                               expected integer, found reference
[INFO] [stdout]    |                                               help: did you mean `x`: `&{integer}`
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected type `{integer}`
[INFO] [stdout]            found reference `&_`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Vec<usize>: FromTraversal<&_>` is not satisfied
[INFO] [stdout]   --> src/impls/slice.rs:28:54
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let traversal: Vec<usize> = data.map(|&x| x).collect();
[INFO] [stdout]    |                                                      ^^^^^^^ the trait `FromTraversal<&_>` is not implemented for `Vec<usize>`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the following implementations were found:
[INFO] [stdout]              <Vec<T> as FromTraversal<T>>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'array_map'
[INFO] [stdout]   --> src/impls/slice.rs:35:39
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let traversal: Vec<()> = data.map(|&x| x).collect();
[INFO] [stdout]    |                                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #75243 <https://github.com/rust-lang/rust/issues/75243> for more information
[INFO] [stdout]    = help: add `#![feature(array_map)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/impls/slice.rs:35:44
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let traversal: Vec<()> = data.map(|&x| x).collect();
[INFO] [stdout]    |                                            ^--
[INFO] [stdout]    |                                            ||
[INFO] [stdout]    |                                            |expected due to this
[INFO] [stdout]    |                                            expected `()`, found reference
[INFO] [stdout]    |                                            help: did you mean `x`: `&()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected unit type `()`
[INFO] [stdout]               found reference `&_`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Vec<()>: FromTraversal<&_>` is not satisfied
[INFO] [stdout]   --> src/impls/slice.rs:35:51
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let traversal: Vec<()> = data.map(|&x| x).collect();
[INFO] [stdout]    |                                                   ^^^^^^^ the trait `FromTraversal<&_>` is not implemented for `Vec<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the following implementations were found:
[INFO] [stdout]              <Vec<T> as FromTraversal<T>>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `traverse`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "b3a1e11ea24c60a1898e43103884df3cf810f317c1d666c6498d094652dd40f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3a1e11ea24c60a1898e43103884df3cf810f317c1d666c6498d094652dd40f0", kill_on_drop: false }`
[INFO] [stdout] b3a1e11ea24c60a1898e43103884df3cf810f317c1d666c6498d094652dd40f0
