[INFO] updating cached repository https://github.com/emallson/bct.rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0d4dfa531f1e54a7dc29927aa3ff5ca5b48702e6
[INFO] checking emallson/bct.rs against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femallson%2Fbct.rs" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emallson/bct.rs on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/emallson/bct.rs
[INFO] finished tweaking git repo https://github.com/emallson/bct.rs
[INFO] tweaked toml for git repo https://github.com/emallson/bct.rs written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/emallson/bct.rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 84ad5420d9d1cc0328b3f0dd449a540755e794f16d133846cdc7839d4e2f30b4
[INFO] running `"docker" "start" "-a" "84ad5420d9d1cc0328b3f0dd449a540755e794f16d133846cdc7839d4e2f30b4"`
[INFO] [stderr]     Checking libc v0.2.34
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking num-traits v0.1.41
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling cc v1.0.3
[INFO] [stderr]    Compiling byteorder v0.4.2
[INFO] [stderr]     Checking either v1.4.0
[INFO] [stderr]    Compiling rayon-core v1.3.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking slog v1.7.1
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking ordermap v0.3.2
[INFO] [stderr]     Checking fixedbitset v0.1.8
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking serde v1.0.23
[INFO] [stderr]     Checking rustc-demangle v0.1.5
[INFO] [stderr]     Checking slog v2.0.12
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking strsim v0.5.2
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking serde v0.9.15
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking as_num v0.2.3
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking colored v1.6.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]    Compiling capnp v0.7.5
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking coco v0.1.1
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking rand v0.3.18
[INFO] [stderr]     Checking num_cpus v1.7.0
[INFO] [stderr] error[E0502]: cannot borrow `*reff` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/capnp-0.7.5/src/private/layout.rs:643:47
[INFO] [stderr]     |
[INFO] [stderr] 643 |         let ptr = try!(follow_fars(&mut reff, (*reff).target(), &mut segment));
[INFO] [stderr]     |                        ----------- ---------  ^^^^^^^ immutable borrow occurs here
[INFO] [stderr]     |                        |           |
[INFO] [stderr]     |                        |           mutable borrow occurs here
[INFO] [stderr]     |                        mutable borrow later used by call
[INFO] [stderr] 
[INFO] [stderr]     Checking memchr v2.0.1
[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 `capnp`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "84ad5420d9d1cc0328b3f0dd449a540755e794f16d133846cdc7839d4e2f30b4"`
[INFO] running `"docker" "rm" "-f" "84ad5420d9d1cc0328b3f0dd449a540755e794f16d133846cdc7839d4e2f30b4"`
[INFO] [stdout] 84ad5420d9d1cc0328b3f0dd449a540755e794f16d133846cdc7839d4e2f30b4
