[INFO] cloning repository https://github.com/max-frai/MongodbDriverHangs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/max-frai/MongodbDriverHangs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmax-frai%2FMongodbDriverHangs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmax-frai%2FMongodbDriverHangs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52246a3ad274540ecea4f6ff6bdf6437ae67d4b6
[INFO] documenting max-frai/MongodbDriverHangs against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmax-frai%2FMongodbDriverHangs" "/workspace/builds/worker-34/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-34/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/max-frai/MongodbDriverHangs on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/max-frai/MongodbDriverHangs
[INFO] finished tweaking git repo https://github.com/max-frai/MongodbDriverHangs
[INFO] tweaked toml for git repo https://github.com/max-frai/MongodbDriverHangs written to /workspace/builds/worker-34/source/Cargo.toml
[INFO] crate git repo https://github.com/max-frai/MongodbDriverHangs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded backtrace v0.3.51
[INFO] [stderr]   Downloaded typed-builder v0.3.0
[INFO] [stderr]   Downloaded libc v0.2.78
[INFO] [stderr]   Downloaded webpki v0.21.3
[INFO] [stderr]   Downloaded webpki-roots v0.18.0
[INFO] [stderr]   Downloaded md-5 v0.8.0
[INFO] [stderr]   Downloaded sct v0.6.0
[INFO] [stderr]   Downloaded hermit-abi v0.1.16
[INFO] [stderr]   Downloaded async-std v1.6.5
[INFO] [stderr]   Downloaded serde_json v1.0.58
[INFO] [stderr]   Downloaded polling v1.1.0
[INFO] [stderr]   Downloaded async-channel v1.4.2
[INFO] [stderr]   Downloaded async-io v1.1.6
[INFO] [stderr]   Downloaded async-global-executor v1.3.0
[INFO] [stderr]   Downloaded futures-lite v1.8.0
[INFO] [stderr]   Downloaded wepoll-sys-stjepang v1.0.8
[INFO] [stderr]   Downloaded async-task v4.0.2
[INFO] [stderr]   Downloaded instant v0.1.7
[INFO] [stderr]   Downloaded nb-connect v1.0.1
[INFO] [stderr]   Downloaded hmac v0.7.1
[INFO] [stderr]   Downloaded rustversion v1.0.3
[INFO] [stderr]   Downloaded fastrand v1.3.5
[INFO] [stderr]   Downloaded syn v1.0.42
[INFO] [stderr]   Downloaded pin-project-internal v0.4.25
[INFO] [stderr]   Downloaded widestring v0.4.2
[INFO] [stderr]   Downloaded pin-project v0.4.25
[INFO] [stderr]   Downloaded object v0.20.0
[INFO] [stderr]   Downloaded standback v0.2.10
[INFO] [stderr]   Downloaded blocking v1.0.0
[INFO] [stderr]   Downloaded derivative v2.1.1
[INFO] [stderr]   Downloaded crypto-mac v0.7.0
[INFO] [stderr]   Downloaded os_info v2.0.8
[INFO] [stderr]   Downloaded async-executor v1.3.0
[INFO] [stderr]   Downloaded thiserror-impl v1.0.20
[INFO] [stderr]   Downloaded pbkdf2 v0.3.0
[INFO] [stderr]   Downloaded tokio-rustls v0.13.1
[INFO] [stderr]   Downloaded pin-project-lite v0.1.10
[INFO] [stderr]   Downloaded rustls v0.17.0
[INFO] [stderr]   Downloaded bson v1.1.0
[INFO] [stderr]   Downloaded num-integer v0.1.43
[INFO] [stderr]   Downloaded serde_with_macros v1.2.0
[INFO] [stderr]   Downloaded miniz_oxide v0.4.2
[INFO] [stderr]   Downloaded thiserror v1.0.20
[INFO] [stderr]   Downloaded serde_derive v1.0.116
[INFO] [stderr]   Downloaded futures-intrusive v0.3.1
[INFO] [stderr]   Downloaded serde_with v1.5.0
[INFO] [stderr]   Downloaded cc v1.0.60
[INFO] [stderr]   Downloaded mongodb v1.1.1
[INFO] [stderr]   Downloaded ring v0.16.15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f72f8bdbeef78df83c5c9c3e6990ad30e277b7a68dbc62b31de0e48fb5cca563
[INFO] running `Command { std: "docker" "start" "-a" "f72f8bdbeef78df83c5c9c3e6990ad30e277b7a68dbc62b31de0e48fb5cca563", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f72f8bdbeef78df83c5c9c3e6990ad30e277b7a68dbc62b31de0e48fb5cca563", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f72f8bdbeef78df83c5c9c3e6990ad30e277b7a68dbc62b31de0e48fb5cca563", kill_on_drop: false }`
[INFO] [stdout] f72f8bdbeef78df83c5c9c3e6990ad30e277b7a68dbc62b31de0e48fb5cca563
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18c6e8d945568f03a3b47a13f3a7a97c58d364ec21a0d11ff13204e6614adccb
[INFO] running `Command { std: "docker" "start" "-a" "18c6e8d945568f03a3b47a13f3a7a97c58d364ec21a0d11ff13204e6614adccb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.78
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking pin-project-lite v0.1.10
[INFO] [stderr]    Compiling pin-project-internal v0.4.25
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking arc-swap v0.4.7
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking tinyvec v0.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking copyless v0.1.5
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]    Compiling serde_json v1.0.58
[INFO] [stderr]     Checking fastrand v1.3.5
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]    Compiling const_fn v0.4.2
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]    Compiling encoding_rs v0.8.24
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking async-task v4.0.2
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking instant v0.1.7
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking bytestring v0.1.5
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking unicode-normalization v0.1.13
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking tinyvec v1.0.1
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.2
[INFO] [stderr]    Compiling standback v0.2.10
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling time v0.2.22
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling cookie v0.14.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking async-channel v1.4.2
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking futures-lite v1.8.0
[INFO] [stderr]     Checking tracing v0.1.21
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking os_info v2.0.8
[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-0.15.44/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=745695e9f57814e9 -C extra-filename=-745695e9f57814e9 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-5183daaff8fc0d44.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-6b52825d784462e1.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-123b1a1a47f71896.rmeta --cap-lints allow --cfg syn_can_match_trailing_dollar --cfg syn_can_use_thread_id --cfg syn_can_use_associated_constants --cfg syn_can_call_macro_by_path --cfg syn_disable_nightly_tests` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "18c6e8d945568f03a3b47a13f3a7a97c58d364ec21a0d11ff13204e6614adccb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18c6e8d945568f03a3b47a13f3a7a97c58d364ec21a0d11ff13204e6614adccb", kill_on_drop: false }`
[INFO] [stdout] 18c6e8d945568f03a3b47a13f3a7a97c58d364ec21a0d11ff13204e6614adccb