[INFO] updating cached repository https://github.com/0x7CFE/cortex
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f901670b230530e692eec001e99f5be798989519
[INFO] checking 0x7CFE/cortex against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2F0x7CFE%2Fcortex" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/0x7CFE/cortex on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/0x7CFE/cortex
[INFO] finished tweaking git repo https://github.com/0x7CFE/cortex
[INFO] tweaked toml for git repo https://github.com/0x7CFE/cortex written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/0x7CFE/cortex already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 34c78ac462bfbbb062ed2be7f7fac58bd95967214cabc4bb531d639aab5f5f2a
[INFO] running `"docker" "start" "-a" "34c78ac462bfbbb062ed2be7f7fac58bd95967214cabc4bb531d639aab5f5f2a"`
[INFO] [stderr]     Checking sample v0.6.2
[INFO] [stderr]     Checking hound v3.1.0
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]     Checking bincode v1.0.0-alpha7
[INFO] [stderr]     Checking clap v2.23.2
[INFO] [stderr]    Compiling serde_codegen_internals v0.14.2
[INFO] [stderr]     Checking dft v0.5.4
[INFO] [stderr]    Compiling serde_derive v0.9.14
[INFO] [stderr]     Checking cortex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `collections_bound` has been stable since 1.17.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:2:25
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(btree_range, collections_bound)]
[INFO] [stderr]   |                         ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `btree_range` has been stable since 1.17.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(btree_range, collections_bound)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `collections_bound` has been stable since 1.17.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:2:25
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(btree_range, collections_bound)]
[INFO] [stderr]   |                         ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `btree_range` has been stable since 1.17.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(btree_range, collections_bound)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.34s
[INFO] running `"docker" "inspect" "34c78ac462bfbbb062ed2be7f7fac58bd95967214cabc4bb531d639aab5f5f2a"`
[INFO] running `"docker" "rm" "-f" "34c78ac462bfbbb062ed2be7f7fac58bd95967214cabc4bb531d639aab5f5f2a"`
[INFO] [stdout] 34c78ac462bfbbb062ed2be7f7fac58bd95967214cabc4bb531d639aab5f5f2a