[INFO] cloning repository https://github.com/c7x43t/hello_cargo2
[INFO] running `"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"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fc7x43t%2Fhello_cargo2'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ca56607fc36473d00a8f684a3409f93a3db5c595
[INFO] checking c7x43t/hello_cargo2 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fc7x43t%2Fhello_cargo2" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/c7x43t/hello_cargo2 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-5/source/Cargo.toml
[INFO] crate git repo https://github.com/c7x43t/hello_cargo2 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7073422638f3f5ffbfd1a5180a83a3003a3f59cbe1330fc10c7c9a15daa64db1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "7073422638f3f5ffbfd1a5180a83a3003a3f59cbe1330fc10c7c9a15daa64db1"`
[INFO] [stderr]    Compiling syn v0.15.35
[INFO] [stderr]    Compiling num-complex v0.2.2
[INFO] [stderr]     Checking alga v0.5.4
[INFO] [stderr]     Checking ndarray v0.12.1
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking sprs v0.6.4
[INFO] [stderr] error[E0502]: cannot borrow `indptr` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/sprs-0.6.4/src/sparse/triplet_iter.rs:122:26
[INFO] [stderr]     |
[INFO] [stderr] 122 |             indptr[i] += indptr[i - 1];
[INFO] [stderr]     |             -------------^^^^^^-------
[INFO] [stderr]     |             |            |
[INFO] [stderr]     |             |            immutable borrow occurs here
[INFO] [stderr]     |             mutable borrow occurs here
[INFO] [stderr]     |             mutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] error: could not compile `sprs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7073422638f3f5ffbfd1a5180a83a3003a3f59cbe1330fc10c7c9a15daa64db1"`
[INFO] running `"docker" "rm" "-f" "7073422638f3f5ffbfd1a5180a83a3003a3f59cbe1330fc10c7c9a15daa64db1"`
[INFO] [stdout] 7073422638f3f5ffbfd1a5180a83a3003a3f59cbe1330fc10c7c9a15daa64db1