[INFO] crate macro_railroad 0.1.2 is already in cache
[INFO] checking macro_railroad-0.1.2 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] extracting crate macro_railroad 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate macro_railroad 0.1.2 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate macro_railroad 0.1.2
[INFO] finished tweaking crates.io crate macro_railroad 0.1.2
[INFO] tweaked toml for crates.io crate macro_railroad 0.1.2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate macro_railroad 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e2a0957de577467b738ecd797e925aba87673adbeec706df59403de4db466ae1
[INFO] running `"docker" "start" "-a" "e2a0957de577467b738ecd797e925aba87673adbeec706df59403de4db466ae1"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.4
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking htmlescape v0.3.1
[INFO] [stderr]     Checking getrandom v0.1.12
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking railroad v0.1.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking quote v1.0.2
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking railroad_verification v0.1.0
[INFO] [stderr]     Checking macro_railroad v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] 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] [stderr]    --> src/lowering.rs:793:18
[INFO] [stderr]     |
[INFO] [stderr] 793 |                 .into_iter()
[INFO] [stderr]     |                  ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] 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] [stderr]    --> src/lowering.rs:799:35
[INFO] [stderr]     |
[INFO] [stderr] 799 |             ["Foobar".to_owned()].into_iter().cloned().collect()
[INFO] [stderr]     |                                   ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.32s
[INFO] running `"docker" "inspect" "e2a0957de577467b738ecd797e925aba87673adbeec706df59403de4db466ae1"`
[INFO] running `"docker" "rm" "-f" "e2a0957de577467b738ecd797e925aba87673adbeec706df59403de4db466ae1"`
[INFO] [stdout] e2a0957de577467b738ecd797e925aba87673adbeec706df59403de4db466ae1