[INFO] updating cached repository https://github.com/pop-os/upgrade
[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/pop-os/upgrade
[INFO] [stderr]  * [new branch]      snapd-faster    -> snapd-faster
[INFO] [stderr]  * [new branch]      source-list-fix -> source-list-fix
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5401b3f7b52d5b57dc42b7e6ec32e661d6cca5bb
[INFO] checking pop-os/upgrade against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpop-os%2Fupgrade" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pop-os/upgrade on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/pop-os/upgrade
[INFO] removed workspace from git repo https://github.com/pop-os/upgrade
[INFO] finished tweaking git repo https://github.com/pop-os/upgrade
[INFO] tweaked toml for git repo https://github.com/pop-os/upgrade written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/pop-os/upgrade already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /workspace/builds/worker-9/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/sysfs-class`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-cli-wrappers`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-fetcher`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-keyring`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-sources-lists`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/async-fetcher`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/distinst/`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/exit-status-ext`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-release-file`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=allow" "-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" "+beta-2019-10-27" "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] e702284cd89db4b34b676db62a2f6198a0d6b27d181f9077646eafeac8a7e5f0
[INFO] running `"docker" "start" "-a" "e702284cd89db4b34b676db62a2f6198a0d6b27d181f9077646eafeac8a7e5f0"`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking numtoa v0.2.3
[INFO] [stderr]     Checking cascade v0.1.3
[INFO] [stderr]     Checking iowrap v0.1.2
[INFO] [stderr]     Checking deb-architectures v0.1.0
[INFO] [stderr]     Checking distinst-bootloader v0.1.0 (https://github.com/pop-os/distinst/#d59db4b3)
[INFO] [stderr]     Checking hex-view v0.1.3
[INFO] [stderr]     Checking progress-streams v1.1.0
[INFO] [stderr]     Checking exit-status-ext v0.1.0 (https://github.com/pop-os/exit-status-ext#46700735)
[INFO] [stderr]     Checking human-sort v0.2.2
[INFO] [stderr]     Checking atomic v0.4.5
[INFO] [stderr]     Checking os-release v0.1.0
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling lz4-sys v1.8.3
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling libdbus-sys v0.2.1
[INFO] [stderr]    Compiling lzma-sys v0.1.15
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]     Checking snailquote v0.2.0
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]     Checking sysfs-class v0.1.2 (https://github.com/pop-os/sysfs-class#25c8ab30)
[INFO] [stderr]     Checking errno v0.2.4
[INFO] [stderr]     Checking filetime v0.2.7
[INFO] [stderr]    Compiling syntex_errors v0.58.1
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking crossbeam-epoch v0.5.2
[INFO] [stderr]     Checking openssl-sys v0.9.52
[INFO] [stderr]    Compiling smart-default v0.2.0
[INFO] [stderr]     Checking flate2 v1.0.12
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]     Checking envfile v0.2.1
[INFO] [stderr]    Compiling clang-sys v0.19.0
[INFO] [stderr]     Checking loopdev v0.2.1
[INFO] [stderr]     Checking exec v0.3.1
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling derive-new v0.5.8
[INFO] [stderr]    Compiling num-derive v0.3.0
[INFO] [stderr]     Checking sedregex v0.1.1
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking sys-mount v1.2.1
[INFO] [stderr]    Compiling smart-default v0.3.0
[INFO] [stderr]     Checking crossbeam-deque v0.5.2
[INFO] [stderr]     Checking openssl v0.10.25
[INFO] [stderr]     Checking publicsuffix v1.5.3
[INFO] [stderr]     Checking fern v0.5.9
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]     Checking apt-release-file v0.1.1 (https://github.com/pop-os/apt-release-file#a080bc6a)
[INFO] [stderr]    Compiling syntex_syntax v0.58.1
[INFO] [stderr]     Checking distinst-utils v0.1.0 (https://github.com/pop-os/distinst/#d59db4b3)
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.41
[INFO] [stderr]     Checking dbus v0.6.5
[INFO] [stderr]     Checking xz2 v0.1.6
[INFO] [stderr]     Checking distinst-chroot v0.1.0 (https://github.com/pop-os/distinst/#d59db4b3)
[INFO] [stderr]    Compiling cexpr v0.2.3
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking procfs v0.5.4
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking tempfile-fast v0.2.4
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking sha-1 v0.8.1
[INFO] [stderr]     Checking sha2 v0.8.0
[INFO] [stderr]     Checking md-5 v0.8.0
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking http v0.1.19
[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-0.12.15/src/lib.rs --color never --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="parsing"' --cfg 'feature="printing"' --cfg 'feature="quote"' -C metadata=0aeab87dffd04ee8 -C extra-filename=-0aeab87dffd04ee8 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-261e8d6bbd563656.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-cd8dda63b3b70223.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-c279a1d8a1f7179b.rmeta --cap-lints allow --cap-lints=allow` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e702284cd89db4b34b676db62a2f6198a0d6b27d181f9077646eafeac8a7e5f0"`
[INFO] running `"docker" "rm" "-f" "e702284cd89db4b34b676db62a2f6198a0d6b27d181f9077646eafeac8a7e5f0"`
[INFO] [stdout] e702284cd89db4b34b676db62a2f6198a0d6b27d181f9077646eafeac8a7e5f0