[INFO] fetching crate rmcmc 0.1.0...
[INFO] testing rmcmc-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate rmcmc 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rmcmc 0.1.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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 /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libm v0.1.4
[INFO] [stderr]   Downloaded generic-array v0.11.2
[INFO] [stderr]   Downloaded alga v0.7.2
[INFO] [stderr]   Downloaded special v0.7.8
[INFO] [stderr]   Downloaded nalgebra v0.16.14
[INFO] [stderr]   Downloaded assert v0.7.4
[INFO] [stderr]   Downloaded rv v0.4.1
[INFO] running `Command { std: "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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "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] 4abaa7da5f8c5906bd9cdb220e26a44c0acb3c6e6fcdbd1f7cf5b5c799e0a692
[INFO] running `Command { std: "docker" "start" "-a" "4abaa7da5f8c5906bd9cdb220e26a44c0acb3c6e6fcdbd1f7cf5b5c799e0a692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4abaa7da5f8c5906bd9cdb220e26a44c0acb3c6e6fcdbd1f7cf5b5c799e0a692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4abaa7da5f8c5906bd9cdb220e26a44c0acb3c6e6fcdbd1f7cf5b5c799e0a692", kill_on_drop: false }`
[INFO] [stdout] 4abaa7da5f8c5906bd9cdb220e26a44c0acb3c6e6fcdbd1f7cf5b5c799e0a692
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3157f55d157c7c516f05ec6a574a556d5a40428d71262ace59e720b3e844d758
[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" "3157f55d157c7c516f05ec6a574a556d5a40428d71262ace59e720b3e844d758", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling generic-array v0.11.2
[INFO] [stderr]    Compiling alga v0.7.2
[INFO] [stderr]    Compiling nalgebra v0.16.14
[INFO] [stderr]    Compiling rv v0.4.1
[INFO] [stdout] error[E0502]: cannot borrow `summed` as immutable because it is also borrowed as mutable
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rv-0.4.1/src/misc/func.rs:55:22
[INFO] [stdout]    |
[INFO] [stdout] 55 |         summed[i] += summed[i - 1].clone();
[INFO] [stdout]    |         -------------^^^^^^---------------
[INFO] [stdout]    |         |            |
[INFO] [stdout]    |         |            immutable borrow occurs here
[INFO] [stdout]    |         mutable borrow occurs here
[INFO] [stdout]    |         mutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rv` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "3157f55d157c7c516f05ec6a574a556d5a40428d71262ace59e720b3e844d758", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3157f55d157c7c516f05ec6a574a556d5a40428d71262ace59e720b3e844d758", kill_on_drop: false }`
[INFO] [stdout] 3157f55d157c7c516f05ec6a574a556d5a40428d71262ace59e720b3e844d758