[INFO] fetching crate rmcmc 0.1.0...
[INFO] checking rmcmc-0.1.0 against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] extracting crate rmcmc 0.1.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate rmcmc 0.1.0 on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "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-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert v0.7.4
[INFO] [stderr]   Downloaded nalgebra v0.16.14
[INFO] [stderr]   Downloaded rv v0.4.1
[INFO] [stderr]   Downloaded alga v0.7.2
[INFO] [stderr]   Downloaded special v0.7.8
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 60d08a741b9c7db3a0e5bb8b426db7fc99fb79120959d38080722fed3a7b3ae5
[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" "60d08a741b9c7db3a0e5bb8b426db7fc99fb79120959d38080722fed3a7b3ae5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60d08a741b9c7db3a0e5bb8b426db7fc99fb79120959d38080722fed3a7b3ae5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60d08a741b9c7db3a0e5bb8b426db7fc99fb79120959d38080722fed3a7b3ae5", kill_on_drop: false }`
[INFO] [stdout] 60d08a741b9c7db3a0e5bb8b426db7fc99fb79120959d38080722fed3a7b3ae5
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 636cccc6f8466c3b129e6be51dd0b35df28d037912f1c19dcefed2309aef19a2
[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" "636cccc6f8466c3b129e6be51dd0b35df28d037912f1c19dcefed2309aef19a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking assert v0.7.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking special v0.7.8
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking generic-array v0.11.2
[INFO] [stderr]     Checking alga v0.7.2
[INFO] [stderr]     Checking nalgebra v0.16.14
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking 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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "636cccc6f8466c3b129e6be51dd0b35df28d037912f1c19dcefed2309aef19a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "636cccc6f8466c3b129e6be51dd0b35df28d037912f1c19dcefed2309aef19a2", kill_on_drop: false }`
[INFO] [stdout] 636cccc6f8466c3b129e6be51dd0b35df28d037912f1c19dcefed2309aef19a2