[INFO] fetching crate mn 0.2.1...
[INFO] checking mn-0.2.1 against try#1c5262aa6c045a581fb974488793f09ed51fc498 for pr-78376
[INFO] extracting crate mn 0.2.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate mn 0.2.1 on toolchain 1c5262aa6c045a581fb974488793f09ed51fc498
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mn 0.2.1
[INFO] finished tweaking crates.io crate mn 0.2.1
[INFO] tweaked toml for crates.io crate mn 0.2.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded man v0.3.0
[INFO] [stderr]   Downloaded prettyprint v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1c5262aa6c045a581fb974488793f09ed51fc498" "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] c2ba5a13fbcd378f95035ce55e1333cc893eb7003756d5e8fbbb3a20826a6b8e
[INFO] running `Command { std: "docker" "start" "-a" "c2ba5a13fbcd378f95035ce55e1333cc893eb7003756d5e8fbbb3a20826a6b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2ba5a13fbcd378f95035ce55e1333cc893eb7003756d5e8fbbb3a20826a6b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2ba5a13fbcd378f95035ce55e1333cc893eb7003756d5e8fbbb3a20826a6b8e", kill_on_drop: false }`
[INFO] [stdout] c2ba5a13fbcd378f95035ce55e1333cc893eb7003756d5e8fbbb3a20826a6b8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1c5262aa6c045a581fb974488793f09ed51fc498" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 559d2a78541367357c9eea7b947e5f263fabea696af120a39a59cfe871c1bd6e
[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" "559d2a78541367357c9eea7b947e5f263fabea696af120a39a59cfe871c1bd6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking safemem v0.3.3
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking shell-words v0.1.0
[INFO] [stderr]     Checking roff v0.1.0
[INFO] [stderr]     Checking open v1.4.0
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling clang-sys v1.0.1
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling libssh2-sys v0.2.19
[INFO] [stderr]    Compiling curl-sys v0.4.38+curl-7.73.0
[INFO] [stderr]    Compiling libgit2-sys v0.7.11
[INFO] [stderr]     Checking instant v0.1.8
[INFO] [stderr]    Compiling ansi_colours v1.0.1
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling libloading v0.6.5
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking man v0.3.0
[INFO] [stderr]     Checking content_inspector v0.2.4
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]    Compiling darling_core v0.9.0
[INFO] [stderr]    Compiling bindgen v0.55.1
[INFO] [stderr]    Compiling aho-corasick v0.7.14
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking plist v0.4.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking termios v0.3.3
[INFO] [stderr]     Checking backtrace v0.3.54
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking flate2 v1.0.18
[INFO] [stderr]     Checking directories v1.0.2
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling darling_macro v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling darling v0.9.0
[INFO] [stderr]    Compiling derive_builder_core v0.5.0
[INFO] [stderr]    Compiling derive_builder v0.7.2
[INFO] [stderr]    Compiling onig_sys v69.5.1
[INFO] [stderr]     Checking onig v5.0.0
[INFO] [stderr]     Checking syntect v3.3.0
[INFO] [stderr]     Checking git2 v0.7.5
[INFO] [stderr]     Checking prettyprint v0.3.0
[INFO] [stderr]     Checking mn v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> src/bin/generate-docs.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 |     .into_iter()
[INFO] [stdout]    |      ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> src/bin/generate-docs.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 |     .into_iter()
[INFO] [stdout]    |      ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]   --> src/main.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             open::that(&full_path).is_ok();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]   --> src/main.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             open::that(&full_path).is_ok();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 38s
[INFO] running `Command { std: "docker" "inspect" "559d2a78541367357c9eea7b947e5f263fabea696af120a39a59cfe871c1bd6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "559d2a78541367357c9eea7b947e5f263fabea696af120a39a59cfe871c1bd6e", kill_on_drop: false }`
[INFO] [stdout] 559d2a78541367357c9eea7b947e5f263fabea696af120a39a59cfe871c1bd6e