[INFO] cloning repository https://github.com/jbiason/downfav
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jbiason/downfav" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjbiason%2Fdownfav", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjbiason%2Fdownfav'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90314f9482be5ddb1b9dc22f8d99858dd6adc502
[INFO] documenting jbiason/downfav against master#d7d9f15be205b45d44700e7ac33b4f79b91f9680 for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjbiason%2Fdownfav" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jbiason/downfav on toolchain d7d9f15be205b45d44700e7ac33b4f79b91f9680
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jbiason/downfav
[INFO] finished tweaking git repo https://github.com/jbiason/downfav
[INFO] tweaked toml for git repo https://github.com/jbiason/downfav written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jbiason/downfav already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] documenting jbiason/downfav against master#50be22964035027398754e54cd3a497efb00f83e for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjbiason%2Fdownfav" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jbiason/downfav on toolchain 50be22964035027398754e54cd3a497efb00f83e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jbiason/downfav
[INFO] finished tweaking git repo https://github.com/jbiason/downfav
[INFO] tweaked toml for git repo https://github.com/jbiason/downfav written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jbiason/downfav already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "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 tokio-tcp v0.1.3
[INFO] [stderr]   Downloaded autocfg v0.1.6
[INFO] [stderr]   Downloaded proc-macro2 v1.0.4
[INFO] [stderr]   Downloaded toml v0.5.3
[INFO] [stderr]   Downloaded crossbeam-queue v0.1.2
[INFO] [stderr]   Downloaded memoffset v0.5.1
[INFO] [stderr]   Downloaded crossbeam-deque v0.7.1
[INFO] [stderr]   Downloaded tokio-current-thread v0.1.6
[INFO] [stderr]   Downloaded scopeguard v1.0.0
[INFO] [stderr]   Downloaded tokio-executor v0.1.8
[INFO] [stderr]   Downloaded native-tls v0.2.3
[INFO] [stderr]   Downloaded cargo_metadata v0.6.4
[INFO] [stderr]   Downloaded dtoa v0.4.4
[INFO] [stderr]   Downloaded mime_guess v2.0.1
[INFO] [stderr]   Downloaded http v0.1.18
[INFO] [stderr]   Downloaded tendril v0.4.1
[INFO] [stderr]   Downloaded doc-comment v0.3.1
[INFO] [stderr]   Downloaded byteorder v1.3.2
[INFO] [stderr]   Downloaded directories v3.0.2
[INFO] [stderr]   Downloaded bytecount v0.4.0
[INFO] [stderr]   Downloaded html2md v0.2.9
[INFO] [stderr]   Downloaded chrono v0.4.9
[INFO] [stderr]   Downloaded elefren v0.20.1
[INFO] [stderr]   Downloaded xml5ever v0.16.1
[INFO] [stderr]   Downloaded html5ever v0.25.1
[INFO] [stderr]   Downloaded encoding_rs v0.8.20
[INFO] [stderr]   Downloaded tokio-io v0.1.12
[INFO] [stderr]   Downloaded num-integer v0.1.41
[INFO] [stderr]   Downloaded num-traits v0.2.8
[INFO] [stderr]   Downloaded tokio-timer v0.2.11
[INFO] [stderr]   Downloaded pulldown-cmark v0.2.0
[INFO] [stderr]   Downloaded security-framework v0.3.1
[INFO] [stderr]   Downloaded tokio-sync v0.1.6
[INFO] [stderr]   Downloaded indexmap v1.2.0
[INFO] [stderr]   Downloaded cc v1.0.45
[INFO] [stderr]   Downloaded combine v3.8.1
[INFO] [stderr]   Downloaded schannel v0.1.16
[INFO] [stderr]   Downloaded futf v0.1.4
[INFO] [stderr]   Downloaded rand v0.7.2
[INFO] [stderr]   Downloaded backtrace-sys v0.1.31
[INFO] [stderr]   Downloaded regex v1.3.1
[INFO] [stderr]   Downloaded serde_json v1.0.40
[INFO] [stderr]   Downloaded hyper-old-types v0.11.0
[INFO] [stderr]   Downloaded string_cache v0.7.3
[INFO] [stderr]   Downloaded html5ever v0.22.5
[INFO] [stderr]   Downloaded markup5ever v0.10.1
[INFO] [stderr]   Downloaded openssl v0.10.24
[INFO] [stderr]   Downloaded serde v1.0.101
[INFO] [stderr]   Downloaded c2-chacha v0.2.2
[INFO] [stderr]   Downloaded openssl-sys v0.9.49
[INFO] [stderr]   Downloaded log-derive v0.4.1
[INFO] [stderr]   Downloaded security-framework-sys v0.3.1
[INFO] [stderr]   Downloaded isolang v1.0.0
[INFO] [stderr]   Downloaded phf_codegen v0.8.0
[INFO] [stderr]   Downloaded safemem v0.3.2
[INFO] [stderr]   Downloaded tap-reader v1.0.1
[INFO] [stderr]   Downloaded markup5ever_rcdom v0.1.0
[INFO] [stderr]   Downloaded stable_deref_trait v1.1.1
[INFO] [stderr]   Downloaded nodrop v0.1.13
[INFO] [stderr]   Downloaded string_cache_codegen v0.4.4
[INFO] [stderr]   Downloaded dirs-sys v0.3.6
[INFO] [stderr]   Downloaded jni v0.11.0
[INFO] [stderr]   Downloaded smallvec v0.6.10
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.15
[INFO] [stderr]   Downloaded quote v1.0.2
[INFO] [stderr]   Downloaded tempdir v0.3.7
[INFO] [stderr]   Downloaded reqwest v0.9.20
[INFO] [stderr]   Downloaded arrayvec v0.4.11
[INFO] [stderr]   Downloaded crossbeam-epoch v0.7.2
[INFO] [stderr]   Downloaded markup5ever v0.7.5
[INFO] [stderr]   Downloaded serde_derive v1.0.101
[INFO] [stderr]   Downloaded string_cache_shared v0.3.0
[INFO] [stderr]   Downloaded try-lock v0.2.2
[INFO] [stderr]   Downloaded serde_qs v0.4.6
[INFO] [stderr]   Downloaded same-file v1.0.5
[INFO] [stderr]   Downloaded unicase v2.5.1
[INFO] [stderr]   Downloaded pkg-config v0.3.16
[INFO] [stderr]   Downloaded vcpkg v0.2.7
[INFO] [stderr]   Downloaded walkdir v2.2.9
[INFO] [stderr]   Downloaded new_debug_unreachable v1.0.3
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.5
[INFO] [stderr]   Downloaded string_cache v0.8.1
[INFO] [stderr]   Downloaded phf_generator v0.8.0
[INFO] [stderr]   Downloaded utf-8 v0.7.5
[INFO] [stderr]   Downloaded remove_dir_all v0.5.2
[INFO] [stderr]   Downloaded ryu v1.0.0
[INFO] [stderr]   Downloaded error-chain v0.12.1
[INFO] [stderr]   Downloaded mac v0.1.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.12
[INFO] [stderr]   Downloaded data-encoding v2.1.2
[INFO] [stderr]   Downloaded skeptic v0.13.4
[INFO] [stderr]   Downloaded ascii v0.9.3
[INFO] [stderr]   Downloaded phf v0.8.0
[INFO] [stderr]   Downloaded mime v0.3.14
[INFO] [stderr]   Downloaded wasi v0.7.0
[INFO] [stderr]   Downloaded getrandom v0.1.12
[INFO] [stderr]   Downloaded aho-corasick v0.7.6
[INFO] [stderr]   Downloaded string_cache_codegen v0.5.1
[INFO] [stderr]   Downloaded syn v1.0.5
[INFO] [stderr]   Downloaded url v2.1.0
[INFO] [stderr]   Downloaded backtrace v0.3.38
[INFO] [stderr]   Downloaded bitflags v1.2.0
[INFO] [stderr]   Downloaded miniz_oxide v0.3.2
[INFO] [stderr]   Downloaded publicsuffix v1.5.3
[INFO] [stderr]   Downloaded num_cpus v1.10.1
[INFO] [stderr]   Downloaded tokio-reactor v0.1.9
[INFO] [stderr]   Downloaded shellexpand v2.1.0
[INFO] [stderr]   Downloaded flate2 v1.0.11
[INFO] [stderr]   Downloaded time v0.1.42
[INFO] [stderr]   Downloaded memchr v2.2.1
[INFO] [stderr]   Downloaded owning_ref v0.4.0
[INFO] [stderr]   Downloaded unicode-normalization v0.1.8
[INFO] [stderr]   Downloaded siphasher v0.3.5
[INFO] [stderr]   Downloaded itoa v0.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02f410119dbe326f3140a42469ca6cbe9a96f51fef942c66f72620d7c38a25a2
[INFO] running `Command { std: "docker" "start" "-a" "02f410119dbe326f3140a42469ca6cbe9a96f51fef942c66f72620d7c38a25a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02f410119dbe326f3140a42469ca6cbe9a96f51fef942c66f72620d7c38a25a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02f410119dbe326f3140a42469ca6cbe9a96f51fef942c66f72620d7c38a25a2", kill_on_drop: false }`
[INFO] [stdout] 02f410119dbe326f3140a42469ca6cbe9a96f51fef942c66f72620d7c38a25a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c36176911ec120d99041c2f1ff9e517768ec961f9f2fd820b4942e2f5cfbd049
[INFO] running `Command { std: "docker" "start" "-a" "c36176911ec120d99041c2f1ff9e517768ec961f9f2fd820b4942e2f5cfbd049", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.96
[INFO] [stderr]    Compiling proc-macro2 v1.0.4
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling bitflags v1.2.0
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]     Checking new_debug_unreachable v1.0.3
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]     Checking tokio-executor v0.1.8
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]     Checking tendril v0.4.1
[INFO] [stderr]     Checking tokio-sync v0.1.6
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling openssl-sys v0.9.49
[INFO] [stdout] error[E0793]: reference to packed field is unaligned
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tendril-0.4.1/src/tendril.rs:241:20
[INFO] [stdout]     |
[INFO] [stdout] 241 |                 if (*header).refcount.decrement() == 1 {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
[INFO] [stdout]     = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout]     = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stdout] error[E0793]: reference to packed field is unaligned
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tendril-0.4.1/src/tendril.rs:958:9
[INFO] [stdout]     |
[INFO] [stdout] 958 |         (*self.header()).refcount.increment();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
[INFO] [stdout]     = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout]     = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0793`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tendril` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c36176911ec120d99041c2f1ff9e517768ec961f9f2fd820b4942e2f5cfbd049", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c36176911ec120d99041c2f1ff9e517768ec961f9f2fd820b4942e2f5cfbd049", kill_on_drop: false }`
[INFO] [stdout] c36176911ec120d99041c2f1ff9e517768ec961f9f2fd820b4942e2f5cfbd049