[INFO] cloning repository https://github.com/bausano/pong
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bausano/pong" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbausano%2Fpong", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbausano%2Fpong'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca7b62ddbfe310cd84125af3325a8de2c86fa9d5
[INFO] checking bausano/pong against master#9610dfe5a9a731ced1ea4923ecbd0c57fe367898 for beta-170-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbausano%2Fpong" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bausano/pong on toolchain 9610dfe5a9a731ced1ea4923ecbd0c57fe367898
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bausano/pong
[INFO] finished tweaking git repo https://github.com/bausano/pong
[INFO] tweaked toml for git repo https://github.com/bausano/pong written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bausano/pong already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] error[E0502]: cannot borrow `b` as immutable because it is also borrowed as mutable
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/nalgebra-0.17.3/src/sparse/cs_matrix_solve.rs:81:29
[INFO] [stdout]    |
[INFO] [stdout] 81 |                     b[i] -= b[j] * val;
[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] help: try adding a local storing this...
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/nalgebra-0.17.3/src/sparse/cs_matrix_solve.rs:81:29
[INFO] [stdout]    |
[INFO] [stdout] 81 |                     b[i] -= b[j] * val;
[INFO] [stdout]    |                             ^^^^
[INFO] [stdout] help: ...and then using that local here
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/nalgebra-0.17.3/src/sparse/cs_matrix_solve.rs:81:21
[INFO] [stdout]    |
[INFO] [stdout] 81 |                     b[i] -= b[j] * val;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `b` as immutable because it is also borrowed as mutable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/nalgebra-0.17.3/src/sparse/cs_matrix_solve.rs:122:39
[INFO] [stdout]     |
[INFO] [stdout] 122 |                         b[j] -= val * b[i];
[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] help: try adding a local storing this...
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/nalgebra-0.17.3/src/sparse/cs_matrix_solve.rs:122:39
[INFO] [stdout]     |
[INFO] [stdout] 122 |                         b[j] -= val * b[i];
[INFO] [stdout]     |                                       ^^^^
[INFO] [stdout] help: ...and then using that local here
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/nalgebra-0.17.3/src/sparse/cs_matrix_solve.rs:122:25
[INFO] [stdout]     |
[INFO] [stdout] 122 |                         b[j] -= val * b[i];
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `workspace` as immutable because it is also borrowed as mutable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/nalgebra-0.17.3/src/sparse/cs_matrix_solve.rs:181:33
[INFO] [stdout]     |
[INFO] [stdout] 181 |                 workspace[i] -= workspace[j] * val;
[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] help: try adding a local storing this...
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/nalgebra-0.17.3/src/sparse/cs_matrix_solve.rs:181:33
[INFO] [stdout]     |
[INFO] [stdout] 181 |                 workspace[i] -= workspace[j] * val;
[INFO] [stdout]     |                                 ^^^^^^^^^^^^
[INFO] [stdout] help: ...and then using that local here
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/nalgebra-0.17.3/src/sparse/cs_matrix_solve.rs:181:17
[INFO] [stdout]     |
[INFO] [stdout] 181 |                 workspace[i] -= workspace[j] * val;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nalgebra` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e65bba505b290e5bc5ad75948d7142566f88e947dff25cd7b7e6757a6d5dfcd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e65bba505b290e5bc5ad75948d7142566f88e947dff25cd7b7e6757a6d5dfcd1", kill_on_drop: false }`
[INFO] [stdout] e65bba505b290e5bc5ad75948d7142566f88e947dff25cd7b7e6757a6d5dfcd1
