[INFO] fetching crate rmcmc 0.1.0...
[INFO] checking rmcmc-0.1.0 against try#55b3f428b4fac6790b1e8492e0b91ff2d80aec7c for pr-77035
[INFO] extracting crate rmcmc 0.1.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate rmcmc 0.1.0 on toolchain 55b3f428b4fac6790b1e8492e0b91ff2d80aec7c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "read-manifest" "--manifest-path" "Cargo.toml", 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-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rv v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3300716b83365b3009a9471bbc8eb7238076ac3a8097c91c40bb4e4b6bcae0f1
[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" "3300716b83365b3009a9471bbc8eb7238076ac3a8097c91c40bb4e4b6bcae0f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3300716b83365b3009a9471bbc8eb7238076ac3a8097c91c40bb4e4b6bcae0f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3300716b83365b3009a9471bbc8eb7238076ac3a8097c91c40bb4e4b6bcae0f1", kill_on_drop: false }`
[INFO] [stdout] 3300716b83365b3009a9471bbc8eb7238076ac3a8097c91c40bb4e4b6bcae0f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e1912e8b3599576cb318368461e3d5f43f6392ca200176dcbe62a7061236f00
[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" "3e1912e8b3599576cb318368461e3d5f43f6392ca200176dcbe62a7061236f00", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking special v0.7.8
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[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 approx v0.3.2
[INFO] [stderr]     Checking generic-array v0.11.1
[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" "3e1912e8b3599576cb318368461e3d5f43f6392ca200176dcbe62a7061236f00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e1912e8b3599576cb318368461e3d5f43f6392ca200176dcbe62a7061236f00", kill_on_drop: false }`
[INFO] [stdout] 3e1912e8b3599576cb318368461e3d5f43f6392ca200176dcbe62a7061236f00