[INFO] cloning repository https://github.com/Metastasis/faxtop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Metastasis/faxtop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMetastasis%2Ffaxtop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMetastasis%2Ffaxtop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 80d5668dde033d4d2a610d17e3cb3d145a79c358
[INFO] testing Metastasis/faxtop against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMetastasis%2Ffaxtop" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  72% (31/43)   
Checking out files:  74% (32/43)   
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Checking out files:  97% (42/43)   
Checking out files: 100% (43/43)   
Checking out files: 100% (43/43), done.
[INFO] validating manifest of git repo https://github.com/Metastasis/faxtop on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Metastasis/faxtop
[INFO] finished tweaking git repo https://github.com/Metastasis/faxtop
[INFO] tweaked toml for git repo https://github.com/Metastasis/faxtop written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Metastasis/faxtop already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 43b68db3ca111346283af6b15a17964736e7bc2fa4d0661978810ce8260a5eca
[INFO] running `Command { std: "docker" "start" "-a" "43b68db3ca111346283af6b15a17964736e7bc2fa4d0661978810ce8260a5eca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43b68db3ca111346283af6b15a17964736e7bc2fa4d0661978810ce8260a5eca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43b68db3ca111346283af6b15a17964736e7bc2fa4d0661978810ce8260a5eca", kill_on_drop: false }`
[INFO] [stdout] 43b68db3ca111346283af6b15a17964736e7bc2fa4d0661978810ce8260a5eca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 84bf002cedc9dd2ba5beab87decf0e47c87f32b2752bd3ccb0e41ebea8e20633
[INFO] running `Command { std: "docker" "start" "-a" "84bf002cedc9dd2ba5beab87decf0e47c87f32b2752bd3ccb0e41ebea8e20633", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling futures-core v0.3.7
[INFO] [stderr]    Compiling once_cell v1.4.1
[INFO] [stderr]    Compiling cc v1.0.61
[INFO] [stderr]    Compiling futures-io v0.3.7
[INFO] [stderr]    Compiling futures-sink v0.3.7
[INFO] [stderr]    Compiling smallvec v1.4.2
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling tinyvec v0.3.4
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling copyless v0.1.5
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling dtoa v0.4.6
[INFO] [stderr]    Compiling rustc-demangle v0.1.18
[INFO] [stderr]    Compiling cache-padded v1.1.1
[INFO] [stderr]    Compiling match_cfg v0.1.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling object v0.22.0
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling fastrand v1.4.0
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling parking v2.0.0
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling rustversion v1.0.4
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]    Compiling async-task v4.0.3
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling vec-arena v1.0.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling cpuid-bool v0.1.2
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling base64 v0.12.3
[INFO] [stderr]    Compiling atomic-waker v1.0.0
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling hex v0.4.2
[INFO] [stderr]    Compiling thin-slice v0.1.1
[INFO] [stderr]    Compiling ego-tree v0.6.2
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling humantime v2.0.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling dotenv v0.15.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling standback v0.2.11
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling time v0.2.22
[INFO] [stderr]    Compiling cookie v0.14.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
[INFO] [stderr]    Compiling instant v0.1.8
[INFO] [stderr]    Compiling bytestring v0.1.5
[INFO] [stderr]    Compiling lock_api v0.4.1
[INFO] [stderr]    Compiling futures-channel v0.3.7
[INFO] [stderr]    Compiling futures-task v0.3.7
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling concurrent-queue v1.2.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr]    Compiling lru-cache v0.1.2
[INFO] [stderr]    Compiling dtoa-short v0.3.2
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling tinyvec v1.0.1
[INFO] [stderr]    Compiling servo_arc v0.1.1
[INFO] [stderr]    Compiling async-channel v1.5.1
[INFO] [stderr]    Compiling futures-lite v1.11.2
[INFO] [stderr]    Compiling tendril v0.4.1
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling tracing v0.1.21
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling os_info v2.0.8
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling stringprep v0.1.2
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.35
[INFO] [stderr]    Compiling signal-hook-registry v1.2.2
[INFO] [stderr]    Compiling parking_lot_core v0.8.0
[INFO] [stderr]    Compiling socket2 v0.3.15
[INFO] [stderr]    Compiling hostname v0.3.1
[INFO] [stderr]    Compiling nb-connect v1.0.2
[INFO] [stderr]    Compiling polling v2.0.2
[INFO] [stderr]    Compiling parking_lot_core v0.7.2
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling flate2 v1.0.19
[INFO] [stderr]    Compiling err-derive v0.2.4
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling async-executor v1.4.0
[INFO] [stderr]    Compiling blocking v1.0.2
[INFO] [stderr]    Compiling addr2line v0.14.0
[INFO] [stderr]    Compiling resolv-conf v0.7.0
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling url v2.1.1
[INFO] [stderr]    Compiling parking_lot v0.11.0
[INFO] [stderr]    Compiling async-io v1.2.0
[INFO] [stderr]    Compiling env_logger v0.8.1
[INFO] [stderr]    Compiling parking_lot v0.10.2
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling block-buffer v0.9.0
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling backtrace v0.3.54
[INFO] [stderr]    Compiling md-5 v0.8.0
[INFO] [stderr]    Compiling sha-1 v0.8.2
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling pbkdf2 v0.3.0
[INFO] [stderr]    Compiling hmac v0.7.1
[INFO] [stderr]    Compiling futures-intrusive v0.3.1
[INFO] [stderr]    Compiling async-global-executor v1.4.3
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling sha-1 v0.9.2
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling uuid v0.8.1
[INFO] [stderr]    Compiling webpki v0.21.3
[INFO] [stderr]    Compiling sct v0.6.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling selectors v0.22.0
[INFO] [stderr]    Compiling rustls v0.17.0
[INFO] [stderr]    Compiling webpki-roots v0.18.0
[INFO] [stderr]    Compiling brotli2 v0.3.2
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v1.0.1
[INFO] [stderr]    Compiling futures-macro v0.3.7
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling actix-macros v0.1.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling enum-as-inner v0.3.3
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling actix-web-codegen v0.4.0
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr]    Compiling typed-builder v0.3.0
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling tokio v0.2.22
[INFO] [stderr]    Compiling thiserror v1.0.22
[INFO] [stderr]    Compiling time-macros v0.1.1
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr] error: could not compile `serde_derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde_derive /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_derive-1.0.117/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' -C metadata=bddc451217eed62e -C extra-filename=-bddc451217eed62e --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-b8449736663a1660.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-ac1b49ec88ef2fec.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-73597e8f4c8e6d1e.rlib --extern proc_macro --cap-lints allow --cap-lints=warn --cfg underscore_consts` (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" "84bf002cedc9dd2ba5beab87decf0e47c87f32b2752bd3ccb0e41ebea8e20633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84bf002cedc9dd2ba5beab87decf0e47c87f32b2752bd3ccb0e41ebea8e20633", kill_on_drop: false }`
[INFO] [stdout] 84bf002cedc9dd2ba5beab87decf0e47c87f32b2752bd3ccb0e41ebea8e20633