[INFO] fetching crate index_key 0.5.0...
[INFO] checking index_key-0.5.0 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate index_key 0.5.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate index_key 0.5.0 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate index_key 0.5.0
[INFO] finished tweaking crates.io crate index_key 0.5.0
[INFO] tweaked toml for crates.io crate index_key 0.5.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39ba3e6b8b9c03c8b8be0f50b2c08498a924d32d01c0c31d2b57022925a3e778
[INFO] running `Command { std: "docker" "start" "-a" "39ba3e6b8b9c03c8b8be0f50b2c08498a924d32d01c0c31d2b57022925a3e778", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39ba3e6b8b9c03c8b8be0f50b2c08498a924d32d01c0c31d2b57022925a3e778", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39ba3e6b8b9c03c8b8be0f50b2c08498a924d32d01c0c31d2b57022925a3e778", kill_on_drop: false }`
[INFO] [stdout] 39ba3e6b8b9c03c8b8be0f50b2c08498a924d32d01c0c31d2b57022925a3e778
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78ec3f9379f7cb83fa943b9a5fd88b113d926e2043ac4fc2afe7137de1050ef3
[INFO] running `Command { std: "docker" "start" "-a" "78ec3f9379f7cb83fa943b9a5fd88b113d926e2043ac4fc2afe7137de1050ef3", kill_on_drop: false }`
[INFO] [stderr]     Checking index_key v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/lib.rs:324:51
[INFO] [stdout]     |
[INFO] [stdout] 324 |             for b1 in [0u16, 1, u16::max_value()].into_iter() {
[INFO] [stdout]     |                                                   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 324 |             for b1 in [0u16, 1, u16::max_value()].iter() {
[INFO] [stdout]     |                                                   ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 324 |             for b1 in [0u16, 1, u16::max_value()] {
[INFO] [stdout]     |                                                 --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/lib.rs:325:55
[INFO] [stdout]     |
[INFO] [stdout] 325 |                 for b2 in [0u16, 1, u16::max_value()].into_iter() {
[INFO] [stdout]     |                                                       ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 325 |                 for b2 in [0u16, 1, u16::max_value()].iter() {
[INFO] [stdout]     |                                                       ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 325 |                 for b2 in [0u16, 1, u16::max_value()] {
[INFO] [stdout]     |                                                     --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "78ec3f9379f7cb83fa943b9a5fd88b113d926e2043ac4fc2afe7137de1050ef3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78ec3f9379f7cb83fa943b9a5fd88b113d926e2043ac4fc2afe7137de1050ef3", kill_on_drop: false }`
[INFO] [stdout] 78ec3f9379f7cb83fa943b9a5fd88b113d926e2043ac4fc2afe7137de1050ef3