[INFO] crate rmcmc 0.1.0 is already in cache
[INFO] checking rmcmc-0.1.0 against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] extracting crate rmcmc 0.1.0 into work/builds/worker-6/source
[INFO] validating manifest of crates.io crate rmcmc 0.1.0 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 crates.io crate rmcmc 0.1.0
[INFO] finished tweaking crates.io crate rmcmc 0.1.0
[INFO] tweaked toml for crates.io crate rmcmc 0.1.0 written to work/builds/worker-6/source/Cargo.toml
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/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] 2d9e74e89e2d5021799a0c538a6b538e0d4bd39f5cb3b7e83db52b707f420675
[INFO] running `"docker" "start" "-a" "2d9e74e89e2d5021799a0c538a6b538e0d4bd39f5cb3b7e83db52b707f420675"`
[INFO] [stderr]     Checking special v0.7.8
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking alga v0.7.2
[INFO] [stderr]     Checking nalgebra v0.16.14
[INFO] [stderr]     Checking rv v0.4.1
[INFO] [stderr] warning[E0502]: cannot borrow `summed` as immutable because it is also borrowed as mutable
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rv-0.4.1/src/misc/func.rs:55:22
[INFO] [stderr]    |
[INFO] [stderr] 55 |         summed[i] += summed[i - 1].clone();
[INFO] [stderr]    |         -------------^^^^^^---------------
[INFO] [stderr]    |         |            |
[INFO] [stderr]    |         |            immutable borrow occurs here
[INFO] [stderr]    |         mutable borrow occurs here
[INFO] [stderr]    |         mutable borrow later used here
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]    = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking rmcmc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.96s
[INFO] running `"docker" "inspect" "2d9e74e89e2d5021799a0c538a6b538e0d4bd39f5cb3b7e83db52b707f420675"`
[INFO] running `"docker" "rm" "-f" "2d9e74e89e2d5021799a0c538a6b538e0d4bd39f5cb3b7e83db52b707f420675"`
[INFO] [stdout] 2d9e74e89e2d5021799a0c538a6b538e0d4bd39f5cb3b7e83db52b707f420675