[INFO] cloning repository https://github.com/geigerzaehler/rust-ssb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/geigerzaehler/rust-ssb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgeigerzaehler%2Frust-ssb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgeigerzaehler%2Frust-ssb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8dcc5ccf96d398c7bf097ae75cb708d4f108fd09
[INFO] checking geigerzaehler/rust-ssb against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgeigerzaehler%2Frust-ssb" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/geigerzaehler/rust-ssb on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/geigerzaehler/rust-ssb
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/geigerzaehler/rust-ssb
[INFO] tweaked toml for git repo https://github.com/geigerzaehler/rust-ssb written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/geigerzaehler/rust-ssb already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5077d459ce7f2ef6ea2c04ac8e1e2610785f683e84920cefa09e33216dc98b87
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5077d459ce7f2ef6ea2c04ac8e1e2610785f683e84920cefa09e33216dc98b87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5077d459ce7f2ef6ea2c04ac8e1e2610785f683e84920cefa09e33216dc98b87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5077d459ce7f2ef6ea2c04ac8e1e2610785f683e84920cefa09e33216dc98b87", kill_on_drop: false }`
[INFO] [stdout] 5077d459ce7f2ef6ea2c04ac8e1e2610785f683e84920cefa09e33216dc98b87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d158ca2d5a1d482cc0cf5c028a232b695b42f37442d6be427b7e4ed603e0ef1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4d158ca2d5a1d482cc0cf5c028a232b695b42f37442d6be427b7e4ed603e0ef1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling syn v1.0.46
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking futures-core v0.3.7
[INFO] [stderr]     Checking pin-project-lite v0.1.11
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking futures-io v0.3.7
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking regex-syntax v0.6.20
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking futures-sink v0.3.7
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]    Compiling cc v1.0.61
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]    Compiling peg-runtime v0.6.3
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]     Checking never v0.1.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking futures-task v0.3.7
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking sharded-slab v0.1.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking futures-channel v0.3.7
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking predicates v1.0.5
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling peg-macros v0.6.3
[INFO] [stderr]     Checking futures-lite v1.11.2
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking async-executor v1.3.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling libsodium-sys v0.2.6
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking peg v0.6.3
[INFO] [stderr]     Checking async-io v1.1.10
[INFO] [stderr]     Checking assert_cmd v1.0.1
[INFO] [stderr]     Checking dirs v3.0.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[INFO] [stderr]     Checking async-global-executor v1.4.2
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking parking_lot v0.4.8
[INFO] [stderr]     Checking chashmap v2.2.2
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]     Checking goldenfile v1.1.0
[INFO] [stderr]     Checking proptest v0.10.1
[INFO] [stderr]    Compiling proptest v0.10.1 (https://github.com/thomaseizinger/proptest?rev=db7f042e66ebbbe8ddb73068e610dc3946dacd15#db7f042e)
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling proptest-derive v0.2.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.1
[INFO] [stderr]    Compiling futures-macro v0.3.7
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]    Compiling structopt-derive v0.4.13
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]     Checking async-std v1.6.5
[INFO] [stderr] error: could not compile `proptest`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name proptest --edition=2018 /opt/rustwide/cargo-home/git/checkouts/proptest-e22742c3cfa21bf2/db7f042/proptest/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="bit-set"' --cfg 'feature="break-dead-code"' --cfg 'feature="default"' --cfg 'feature="fork"' --cfg 'feature="lazy_static"' --cfg 'feature="quick-error"' --cfg 'feature="regex-syntax"' --cfg 'feature="rusty-fork"' --cfg 'feature="std"' --cfg 'feature="tempfile"' --cfg 'feature="timeout"' -C metadata=ae756559cd54979c -C extra-filename=-ae756559cd54979c --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bit_set=/opt/rustwide/target/debug/deps/libbit_set-d49ad8eef397c3a4.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-df474a8ca45884a8.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-dd535ee656aacf25.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-cd2401a06b1676f6.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-b00bf95a1d7ce469.rmeta --extern quick_error=/opt/rustwide/target/debug/deps/libquick_error-dac6356ab0901515.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-256ac73ea33f7bb0.rmeta --extern rand_chacha=/opt/rustwide/target/debug/deps/librand_chacha-1082841b4f6aa0fb.rmeta --extern rand_xorshift=/opt/rustwide/target/debug/deps/librand_xorshift-a034e16ac0e758e0.rmeta --extern regex_syntax=/opt/rustwide/target/debug/deps/libregex_syntax-0a3c800ea2752104.rmeta --extern rusty_fork=/opt/rustwide/target/debug/deps/librusty_fork-19a385ecb85f1430.rmeta --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-e7beba897cbca2f5.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" "4d158ca2d5a1d482cc0cf5c028a232b695b42f37442d6be427b7e4ed603e0ef1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d158ca2d5a1d482cc0cf5c028a232b695b42f37442d6be427b7e4ed603e0ef1", kill_on_drop: false }`
[INFO] [stdout] 4d158ca2d5a1d482cc0cf5c028a232b695b42f37442d6be427b7e4ed603e0ef1