[INFO] cloning repository https://github.com/dmweis/mqtt_discord_relay
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dmweis/mqtt_discord_relay" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdmweis%2Fmqtt_discord_relay", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdmweis%2Fmqtt_discord_relay'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f4ceb67c0ee0ac56acb148ed006ff0af944a8621
[INFO] testing dmweis/mqtt_discord_relay against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdmweis%2Fmqtt_discord_relay" "/workspace/builds/worker-100/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-100/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dmweis/mqtt_discord_relay on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dmweis/mqtt_discord_relay
[INFO] finished tweaking git repo https://github.com/dmweis/mqtt_discord_relay
[INFO] tweaked toml for git repo https://github.com/dmweis/mqtt_discord_relay written to /workspace/builds/worker-100/source/Cargo.toml
[INFO] crate git repo https://github.com/dmweis/mqtt_discord_relay already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/dmweis/libzmq-rs`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rust-argon2 v0.7.0
[INFO] [stderr]   Downloaded humantime v2.0.0
[INFO] [stderr]   Downloaded chrono v0.4.11
[INFO] [stderr]   Downloaded jsonwebtoken v6.0.1
[INFO] [stderr]   Downloaded hermit-abi v0.1.10
[INFO] [stderr]   Downloaded failure_derive v0.1.7
[INFO] [stderr]   Downloaded derive_more v0.13.0
[INFO] [stderr]   Downloaded failure v0.1.7
[INFO] [stderr]   Downloaded backtrace v0.3.46
[INFO] [stderr]   Downloaded redox_users v0.3.4
[INFO] [stderr]   Downloaded simplelog v0.7.5
[INFO] [stderr]   Downloaded humantime-serde v1.0.0
[INFO] [stderr]   Downloaded flatc-rust v0.1.2
[INFO] [stderr]   Downloaded backtrace-sys v0.1.35
[INFO] [stderr]   Downloaded serde_derive v1.0.106
[INFO] [stderr]   Downloaded serde v1.0.106
[INFO] [stderr]   Downloaded serde_json v1.0.51
[INFO] [stderr]   Downloaded mqtt311 v0.2.0
[INFO] [stderr]   Downloaded rumqtt v0.31.0
[INFO] [stderr]   Downloaded zeromq-src v0.1.8+4.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cecb144271a3e33ebf9050395638383b8215c0b4bec4f1df8c2879e30ba5f4d8
[INFO] running `Command { std: "docker" "start" "-a" "cecb144271a3e33ebf9050395638383b8215c0b4bec4f1df8c2879e30ba5f4d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cecb144271a3e33ebf9050395638383b8215c0b4bec4f1df8c2879e30ba5f4d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cecb144271a3e33ebf9050395638383b8215c0b4bec4f1df8c2879e30ba5f4d8", kill_on_drop: false }`
[INFO] [stdout] cecb144271a3e33ebf9050395638383b8215c0b4bec4f1df8c2879e30ba5f4d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55c49b05fb4acf1d499d6cb2f45a9a39b743fd2661155cf922172d7861599aec
[INFO] running `Command { std: "docker" "start" "-a" "55c49b05fb4acf1d499d6cb2f45a9a39b743fd2661155cf922172d7861599aec", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling futures v0.1.29
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling humantime v2.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]    Compiling smallvec v0.6.13
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling term v0.6.1
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]    Compiling tokio-sync v0.1.8
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling tokio-executor v0.1.10
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling zeromq-src v0.1.8+4.3.2
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling simplelog v0.7.5
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling tokio-timer v0.2.13
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling webpki v0.19.1
[INFO] [stderr]    Compiling sct v0.5.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling tokio-codec v0.1.2
[INFO] [stderr]    Compiling libzmq-sys v0.1.7+4.3.2 (https://github.com/dmweis/libzmq-rs#f10f9d42)
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling rustls v0.15.2
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling uuid v0.8.1
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling serde_with_macros v1.1.0
[INFO] [stderr]    Compiling tokio-rustls v0.9.4
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling derive_more v0.13.0
[INFO] [stderr]    Compiling mqtt311 v0.2.0
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling humantime-serde v1.0.0
[INFO] [stderr]    Compiling bincode v1.2.1
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling serde_with v1.4.0
[INFO] [stderr]    Compiling jsonwebtoken v6.0.1
[INFO] [stderr] error: could not compile `serde_json`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde_json --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.51/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="std"' -C metadata=cd42dafa155a849a -C extra-filename=-cd42dafa155a849a --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern itoa=/opt/rustwide/target/debug/deps/libitoa-244e0f03ba421831.rmeta --extern ryu=/opt/rustwide/target/debug/deps/libryu-97e1588f31b33216.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-0dd2e623eb2ab565.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 `Command { std: "docker" "inspect" "55c49b05fb4acf1d499d6cb2f45a9a39b743fd2661155cf922172d7861599aec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55c49b05fb4acf1d499d6cb2f45a9a39b743fd2661155cf922172d7861599aec", kill_on_drop: false }`
[INFO] [stdout] 55c49b05fb4acf1d499d6cb2f45a9a39b743fd2661155cf922172d7861599aec