[INFO] cloning repository https://github.com/c7x43t/hello_cargo2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/c7x43t/hello_cargo2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fc7x43t%2Fhello_cargo2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fc7x43t%2Fhello_cargo2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca56607fc36473d00a8f684a3409f93a3db5c595
[INFO] checking c7x43t/hello_cargo2 against master#c5fbcd35a8217a17f6b63a22217ace06cf8f5f02 for pr-86194
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fc7x43t%2Fhello_cargo2" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/c7x43t/hello_cargo2 on toolchain c5fbcd35a8217a17f6b63a22217ace06cf8f5f02
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/c7x43t/hello_cargo2
[INFO] finished tweaking git repo https://github.com/c7x43t/hello_cargo2
[INFO] tweaked toml for git repo https://github.com/c7x43t/hello_cargo2 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/c7x43t/hello_cargo2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38b660da6dcc1238c507aec586d9312fd86364f7ba2d0a98688f9f81fb14f326
[INFO] running `Command { std: "docker" "start" "-a" "38b660da6dcc1238c507aec586d9312fd86364f7ba2d0a98688f9f81fb14f326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38b660da6dcc1238c507aec586d9312fd86364f7ba2d0a98688f9f81fb14f326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38b660da6dcc1238c507aec586d9312fd86364f7ba2d0a98688f9f81fb14f326", kill_on_drop: false }`
[INFO] [stdout] 38b660da6dcc1238c507aec586d9312fd86364f7ba2d0a98688f9f81fb14f326
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0914dd9d2a6de84278cbd49bfba8f5ad4e14f04030678a6388a0f019a37f3893
[INFO] running `Command { std: "docker" "start" "-a" "0914dd9d2a6de84278cbd49bfba8f5ad4e14f04030678a6388a0f019a37f3893", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling syn v0.15.35
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling ndarray v0.12.1
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-complex v0.2.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking alga v0.5.4
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking sprs v0.6.4
[INFO] [stdout] error[E0502]: cannot borrow `indptr` as immutable because it is also borrowed as mutable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/sprs-0.6.4/src/sparse/triplet_iter.rs:122:26
[INFO] [stdout]     |
[INFO] [stdout] 122 |             indptr[i] += indptr[i - 1];
[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] [stderr] error: could not compile `sprs`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "0914dd9d2a6de84278cbd49bfba8f5ad4e14f04030678a6388a0f019a37f3893", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0914dd9d2a6de84278cbd49bfba8f5ad4e14f04030678a6388a0f019a37f3893", kill_on_drop: false }`
[INFO] [stdout] 0914dd9d2a6de84278cbd49bfba8f5ad4e14f04030678a6388a0f019a37f3893