[INFO] updating cached repository https://github.com/jacobmischka/corkboard-backend
[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] 99d9e368662477147189945242963c1b4488c230
[INFO] checking jacobmischka/corkboard-backend against master#2da942f32802c8233a09744024dfbc34431adf65 for pr-66963
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjacobmischka%2Fcorkboard-backend" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jacobmischka/corkboard-backend on toolchain 2da942f32802c8233a09744024dfbc34431adf65
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jacobmischka/corkboard-backend
[INFO] finished tweaking git repo https://github.com/jacobmischka/corkboard-backend
[INFO] tweaked toml for git repo https://github.com/jacobmischka/corkboard-backend written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/jacobmischka/corkboard-backend already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+2da942f32802c8233a09744024dfbc34431adf65" "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] 8755d9eae7fc6cc7087b06b0141d0437a4348af8be5c870946fbf1d83e848355
[INFO] running `"docker" "start" "-a" "8755d9eae7fc6cc7087b06b0141d0437a4348af8be5c870946fbf1d83e848355"`
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]     Checking pdqselect v0.1.0
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]     Checking num-complex v0.2.1
[INFO] [stderr]     Checking indexmap v1.0.2
[INFO] [stderr]     Checking uom v0.20.1
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking cgmath v0.16.1
[INFO] [stderr]     Checking h2 v0.1.13
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking alga v0.7.2
[INFO] [stderr]     Checking tokio-reactor v0.1.6
[INFO] [stderr]     Checking crossbeam-channel v0.2.6
[INFO] [stderr]     Checking diesel v1.3.3
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]     Checking num-rational v0.2.1
[INFO] [stderr]     Checking nalgebra v0.16.8
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio-udp v0.1.2
[INFO] [stderr]     Checking tokio-uds v0.2.3
[INFO] [stderr]     Checking tokio-signal v0.2.6
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]     Checking trust-dns-proto v0.4.3
[INFO] [stderr] error: could not compile `syn`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.18/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=f3919c6cd6ab878f -C extra-filename=-f3919c6cd6ab878f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-4df5eaca0603a065.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-cf9a56294a4b06f7.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-e2d262badb8a48c3.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0502]: cannot borrow `*self` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.16.8/src/base/cg.rs:291:44
[INFO] [stderr]     |
[INFO] [stderr] 291 |                 self[(j, i)] += shift[j] * self[(D::dim() - 1, i)];
[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 `nalgebra`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8755d9eae7fc6cc7087b06b0141d0437a4348af8be5c870946fbf1d83e848355"`
[INFO] running `"docker" "rm" "-f" "8755d9eae7fc6cc7087b06b0141d0437a4348af8be5c870946fbf1d83e848355"`
[INFO] [stdout] 8755d9eae7fc6cc7087b06b0141d0437a4348af8be5c870946fbf1d83e848355