[INFO] updating cached repository https://github.com/ascii-dresden/ascii-prepaid-system
[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] [stderr] From https://github.com/ascii-dresden/ascii-prepaid-system
[INFO] [stderr]    0c1c44a..e7fbeb5  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e7fbeb5d94718918d8b5d06f477ceb84df085e61
[INFO] checking ascii-dresden/ascii-prepaid-system against try#e60d9e09c55855f5a848fde8ad83e13131a5b241 for pr-68350
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fascii-dresden%2Fascii-prepaid-system" "/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/ascii-dresden/ascii-prepaid-system on toolchain e60d9e09c55855f5a848fde8ad83e13131a5b241
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ascii-dresden/ascii-prepaid-system
[INFO] finished tweaking git repo https://github.com/ascii-dresden/ascii-prepaid-system
[INFO] tweaked toml for git repo https://github.com/ascii-dresden/ascii-prepaid-system written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/ascii-dresden/ascii-prepaid-system already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded handlebars v3.0.0
[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" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "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] 2f18ba8424e29e2168e61b5aa3b561ba2656702210570a50a578e9df4c83ad59
[INFO] running `"docker" "start" "-a" "2f18ba8424e29e2168e61b5aa3b561ba2656702210570a50a578e9df4c83ad59"`
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]     Checking sublime_fuzzy v0.6.0
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]     Checking socket2 v0.3.11
[INFO] [stderr]     Checking filetime v0.2.8
[INFO] [stderr]    Compiling jobserver v0.1.17
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling sass-sys v0.4.15
[INFO] [stderr]     Checking resolv-conf v0.6.2
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking tokio v0.2.6
[INFO] [stderr] error: could not compile `cc`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name cc --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cc-1.0.47/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 --cfg 'feature="jobserver"' --cfg 'feature="num_cpus"' --cfg 'feature="parallel"' -C metadata=bf107d129706efd4 -C extra-filename=-bf107d129706efd4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern jobserver=/opt/rustwide/target/debug/deps/libjobserver-17a2f6aaa5e5eeae.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-2fec53e5c8d2a9cd.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: could not compile `syn`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-1.0.8/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="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' -C metadata=86d857e66b58bdb8 -C extra-filename=-86d857e66b58bdb8 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-6c4310d2c67b0cf8.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-e99e48db44681a02.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-bc3a162cf651483a.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: build failed
[INFO] running `"docker" "inspect" "2f18ba8424e29e2168e61b5aa3b561ba2656702210570a50a578e9df4c83ad59"`
[INFO] running `"docker" "rm" "-f" "2f18ba8424e29e2168e61b5aa3b561ba2656702210570a50a578e9df4c83ad59"`
[INFO] [stdout] 2f18ba8424e29e2168e61b5aa3b561ba2656702210570a50a578e9df4c83ad59