[INFO] fetching crate pi_async 0.5.7...
[INFO] documenting pi_async-0.5.7 against try#6ee483316d2e4581572121d60a955affb2032eb3+cargoflags=-Zrustdoc-scrape-examples for scrape-examples
[INFO] extracting crate pi_async 0.5.7 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate pi_async 0.5.7 on toolchain 6ee483316d2e4581572121d60a955affb2032eb3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pi_async 0.5.7
[INFO] finished tweaking crates.io crate pi_async 0.5.7
[INFO] tweaked toml for crates.io crate pi_async 0.5.7 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37c9b4fd024d403f64b499eb7e532bdf32ac4b1b9bec31874ac458279bc07166
[INFO] running `Command { std: "docker" "start" "-a" "37c9b4fd024d403f64b499eb7e532bdf32ac4b1b9bec31874ac458279bc07166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37c9b4fd024d403f64b499eb7e532bdf32ac4b1b9bec31874ac458279bc07166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37c9b4fd024d403f64b499eb7e532bdf32ac4b1b9bec31874ac458279bc07166", kill_on_drop: false }`
[INFO] [stdout] 37c9b4fd024d403f64b499eb7e532bdf32ac4b1b9bec31874ac458279bc07166
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json" "-Zrustdoc-scrape-examples", kill_on_drop: false }`
[INFO] [stdout] 9eebfd3dba0ebb3bcf3eed9256ace1431bf5447fe3358ed5a9944fac0f7e2b20
[INFO] running `Command { std: "docker" "start" "-a" "9eebfd3dba0ebb3bcf3eed9256ace1431bf5447fe3358ed5a9944fac0f7e2b20", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling cc v1.0.77
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]     Checking futures-io v0.3.25
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling crossbeam-queue v0.3.8
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking pi_ext_heap v0.1.0
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]    Compiling slotmap v1.0.6
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.13
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking spin v0.9.4
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking num_cpus v1.14.0
[INFO] [stderr]     Checking pi_slot_deque v0.2.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking pi_slot_wheel v0.2.0
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking pi_cancel_timer v0.2.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]     Checking twox-hash v1.6.3
[INFO] [stderr]     Checking pi_hash v0.1.1
[INFO] [stderr]    Compiling futures-macro v0.3.25
[INFO] [stderr]    Compiling ctor v0.1.26
[INFO] [stderr]    Compiling pin-project-internal v1.0.12
[INFO] [stderr]    Compiling async-stream-impl v0.3.3
[INFO] [stderr]     Checking minstant v0.1.2
[INFO] [stderr]     Checking pi_time v0.2.2
[INFO] [stderr]     Checking async-stream v0.3.3
[INFO] [stderr]     Checking pin-project v1.0.12
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]     Checking futures-executor v0.3.25
[INFO] [stderr]     Checking futures v0.3.25
[INFO] [stderr]     Scraping pi_async v0.5.7 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting pi_async v0.5.7 (/opt/rustwide/workdir)
[INFO] [stderr] thread 'rustc' panicked at 'assertion failed: bpos.to_u32() >= mbc.pos.to_u32() + mbc.bytes as u32', compiler/rustc_span/src/lib.rs:1707:17
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x7f444acd07da - std::backtrace_rs::backtrace::libunwind::trace::hbb02440b40bb9669
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stderr]    1:     0x7f444acd07da - std::backtrace_rs::backtrace::trace_unsynchronized::hd2467d754e36e43b
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]    2:     0x7f444acd07da - std::sys_common::backtrace::_print_fmt::h4cf36b1b450e0987
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stderr]    3:     0x7f444acd07da - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h95ee7f4f8f4ef0e1
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]    4:     0x7f444ad332ee - core::fmt::write::hd95edd65674f3a7f
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/fmt/mod.rs:1208:17
[INFO] [stderr]    5:     0x7f444acc0c65 - std::io::Write::write_fmt::h9b03a017f326c606
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/io/mod.rs:1682:15
[INFO] [stderr]    6:     0x7f444acd05a5 - std::sys_common::backtrace::_print::h8405574d8c3d7a77
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]    7:     0x7f444acd05a5 - std::sys_common::backtrace::print::h4e89d3c49e23cb5d
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]    8:     0x7f444acd32ef - std::panicking::default_hook::{{closure}}::he360656a5892d484
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:267:22
[INFO] [stderr]    9:     0x7f444acd302b - std::panicking::default_hook::h96be6d1ab50c8b7a
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:286:9
[INFO] [stderr]   10:     0x7f444acd3b0c - std::panicking::rust_panic_with_hook::hc047a736e498ca95
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:688:13
[INFO] [stderr]   11:     0x7f444acd3862 - std::panicking::begin_panic_handler::{{closure}}::hebe6e2aee7acb8d5
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:577:13
[INFO] [stderr]   12:     0x7f444acd0c8c - std::sys_common::backtrace::__rust_end_short_backtrace::h011959547c4fdea4
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stderr]   13:     0x7f444acd35b2 - rust_begin_unwind
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:575:5
[INFO] [stderr]   14:     0x7f444ad2fcd3 - core::panicking::panic_fmt::h7da7ec46e55b48ce
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/panicking.rs:64:14
[INFO] [stderr]   15:     0x7f444ad2fdad - core::panicking::panic::hbbf385e751cfae35
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/panicking.rs:111:5
[INFO] [stderr]   16:     0x7f444c885ee8 - <rustc_span[e167b39eacdf0df3]::source_map::SourceMap>::lookup_char_pos
[INFO] [stderr]   17:     0x55ece18e998a - <rustdoc[e73844527641c321]::html::render::context::Context>::href_from_span
[INFO] [stderr]   18:     0x55ece18f3e64 - rustdoc[e73844527641c321]::html::sources::print_src
[INFO] [stderr]   19:     0x55ece16d8e97 - rustdoc[e73844527641c321]::html::render::render_call_locations::{closure#2}
[INFO] [stderr]   20:     0x55ece16c650c - rustdoc[e73844527641c321]::html::render::document_full_inner
[INFO] [stderr]   21:     0x55ece16c51fa - rustdoc[e73844527641c321]::html::render::document
[INFO] [stderr]   22:     0x55ece181a1c5 - rustdoc[e73844527641c321]::html::render::print_item::print_item
[INFO] [stderr]   23:     0x55ece18e8cad - <rustdoc[e73844527641c321]::html::render::context::Context>::render_item
[INFO] [stderr]   24:     0x55ece18f0f7c - <rustdoc[e73844527641c321]::html::render::context::Context as rustdoc[e73844527641c321]::formats::renderer::FormatRenderer>::item
[INFO] [stderr]   25:     0x55ece18adf99 - rustdoc[e73844527641c321]::formats::renderer::run_format::<rustdoc[e73844527641c321]::html::render::context::Context>
[INFO] [stderr]   26:     0x55ece162b148 - rustdoc[e73844527641c321]::run_renderer::<rustdoc[e73844527641c321]::html::render::context::Context>
[INFO] [stderr]   27:     0x55ece17c8da2 - <rustc_interface[16d8adced717e44b]::passes::QueryContext>::enter::<rustdoc[e73844527641c321]::main_args::{closure#1}::{closure#0}::{closure#1}, core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>>
[INFO] [stderr]   28:     0x55ece16d9e2a - <rustc_interface[16d8adced717e44b]::interface::Compiler>::enter::<rustdoc[e73844527641c321]::main_args::{closure#1}::{closure#0}, core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>>
[INFO] [stderr]   29:     0x55ece176830a - rustc_span[e167b39eacdf0df3]::with_source_map::<core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>, rustc_interface[16d8adced717e44b]::interface::run_compiler<core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>, rustdoc[e73844527641c321]::main_args::{closure#1}>::{closure#0}::{closure#0}>
[INFO] [stderr]   30:     0x55ece172f5b5 - <scoped_tls[e6ea296e19261d6f]::ScopedKey<rustc_span[e167b39eacdf0df3]::SessionGlobals>>::set::<rustc_interface[16d8adced717e44b]::interface::run_compiler<core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>, rustdoc[e73844527641c321]::main_args::{closure#1}>::{closure#0}, core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>>
[INFO] [stderr]   31:     0x55ece1779870 - std[b20558bc276abb0c]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[16d8adced717e44b]::util::run_in_thread_pool_with_globals<rustc_interface[16d8adced717e44b]::interface::run_compiler<core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>, rustdoc[e73844527641c321]::main_args::{closure#1}>::{closure#0}, core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>>
[INFO] [stderr]   32:     0x55ece189c4ef - <<std[b20558bc276abb0c]::thread::Builder>::spawn_unchecked_<rustc_interface[16d8adced717e44b]::util::run_in_thread_pool_with_globals<rustc_interface[16d8adced717e44b]::interface::run_compiler<core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>, rustdoc[e73844527641c321]::main_args::{closure#1}>::{closure#0}, core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b46aee17bf97dbda]::result::Result<(), rustc_errors[dba815b5c95fbae0]::ErrorGuaranteed>>::{closure#1} as core[b46aee17bf97dbda]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stderr]   33:     0x7f444acdd903 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hbf1d7d8701ecd4fe
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/alloc/src/boxed.rs:2000:9
[INFO] [stderr]   34:     0x7f444acdd903 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h06ac2f1fad6e96dc
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/alloc/src/boxed.rs:2000:9
[INFO] [stderr]   35:     0x7f444acdd903 - std::sys::unix::thread::Thread::new::thread_start::h87d1fc8ce7e33e74
[INFO] [stderr]                                at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stderr]   36:     0x7f444ab61609 - start_thread
[INFO] [stderr]   37:     0x7f444aa86133 - clone
[INFO] [stderr]   38:                0x0 - <unknown>
[INFO] [stderr] error: could not document `pi_async`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name pi_async src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9b26493146b5a8ca -Zunstable-options -L dependency=/opt/rustwide/target/debug/deps --extern async_stream=/opt/rustwide/target/debug/deps/libasync_stream-56d17f693006fb33.rmeta --extern backtrace=/opt/rustwide/target/debug/deps/libbacktrace-306f47bdcf524e09.rmeta --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-e4ad2cd5ab09aa2d.rmeta --extern crossbeam_deque=/opt/rustwide/target/debug/deps/libcrossbeam_deque-25283e134e115506.rmeta --extern crossbeam_queue=/opt/rustwide/target/debug/deps/libcrossbeam_queue-a864377c5de32cbb.rmeta --extern flume=/opt/rustwide/target/debug/deps/libflume-0a7cd6d8e5150666.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-97126dca7a1c2798.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-008350db151a52bd.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-79050d46c61221cc.rmeta --extern minstant=/opt/rustwide/target/debug/deps/libminstant-4b13957276e3a04c.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-537832a332d9ce0a.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-97eb9953a748a1d5.rmeta --extern pi_cancel_timer=/opt/rustwide/target/debug/deps/libpi_cancel_timer-a6cfaf2f21086b14.rmeta --extern pi_hash=/opt/rustwide/target/debug/deps/libpi_hash-231fc785fc79880f.rmeta --extern pi_time=/opt/rustwide/target/debug/deps/libpi_time-4567b997d492dd06.rmeta --extern slotmap=/opt/rustwide/target/debug/deps/libslotmap-f43b47aabedbbf69.rmeta --cap-lints=forbid --crate-version 0.5.7 --with-examples /opt/rustwide/target/debug/deps/pi_async-d4d351f02a3457ef.examples` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "9eebfd3dba0ebb3bcf3eed9256ace1431bf5447fe3358ed5a9944fac0f7e2b20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9eebfd3dba0ebb3bcf3eed9256ace1431bf5447fe3358ed5a9944fac0f7e2b20", kill_on_drop: false }`
[INFO] [stdout] 9eebfd3dba0ebb3bcf3eed9256ace1431bf5447fe3358ed5a9944fac0f7e2b20