[INFO] cloning repository https://github.com/archshift/accion
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/archshift/accion" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farchshift%2Faccion", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farchshift%2Faccion'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 58303c21c1efc4e7c9fd4764ff141788ea38d819
[INFO] documenting archshift/accion against master#d7d9f15be205b45d44700e7ac33b4f79b91f9680 for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farchshift%2Faccion" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/archshift/accion 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/archshift/accion
[INFO] finished tweaking git repo https://github.com/archshift/accion
[INFO] tweaked toml for git repo https://github.com/archshift/accion written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/archshift/accion 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
[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 archshift/accion against master#50be22964035027398754e54cd3a497efb00f83e for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farchshift%2Faccion" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/archshift/accion 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/archshift/accion
[INFO] finished tweaking git repo https://github.com/archshift/accion
[INFO] tweaked toml for git repo https://github.com/archshift/accion written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/archshift/accion 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]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/archshift/dynstack`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] documenting archshift/accion against master#50be22964035027398754e54cd3a497efb00f83e for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farchshift%2Faccion" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/archshift/accion 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/archshift/accion
[INFO] finished tweaking git repo https://github.com/archshift/accion
[INFO] tweaked toml for git repo https://github.com/archshift/accion written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/archshift/accion 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 disjoint-sets v0.4.2
[INFO] [stderr]   Downloaded cbindgen v0.15.0
[INFO] [stderr]   Downloaded iced-x86 v1.9.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] ac130c41b82d73ac29cb479f939a74f11cbaa371e53d1ec53870acb35ffc5ca9
[INFO] running `Command { std: "docker" "start" "-a" "ac130c41b82d73ac29cb479f939a74f11cbaa371e53d1ec53870acb35ffc5ca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac130c41b82d73ac29cb479f939a74f11cbaa371e53d1ec53870acb35ffc5ca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac130c41b82d73ac29cb479f939a74f11cbaa371e53d1ec53870acb35ffc5ca9", kill_on_drop: false }`
[INFO] [stdout] ac130c41b82d73ac29cb479f939a74f11cbaa371e53d1ec53870acb35ffc5ca9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] e6e8f4ba35615b026a57f3b1905da113277d31b42d00f7141317932ca94b888b
[INFO] running `Command { std: "docker" "start" "-a" "e6e8f4ba35615b026a57f3b1905da113277d31b42d00f7141317932ca94b888b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling cbindgen v0.15.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling iced-x86 v1.9.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling dynstack v0.4.0 (https://github.com/archshift/dynstack?rev=7bba8e808b907c6a0d70e648fb0bc5672cf87c22#7bba8e80)
[INFO] [stderr]    Compiling cc v1.0.61
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking disjoint-sets v0.4.2
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling derive-newtype v0.2.3
[INFO] [stderr]    Compiling toml v0.5.7
[INFO] [stderr]    Compiling accion v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `accion v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/accion-d9d0a17f8a198839/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at build.rs:47:10:
[INFO] [stderr]   Could not spawn flex!: Os { code: 2, kind: NotFound, message: "No such file or directory" }
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x56283460279c - std::backtrace_rs::backtrace::libunwind::trace::h07473c7175e14fb5
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stderr]      1:     0x56283460279c - std::backtrace_rs::backtrace::trace_unsynchronized::h202a3f3a96ced794
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x56283460279c - std::sys_common::backtrace::_print_fmt::h855a5ba890cea478
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x56283460279c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hbe90c35ea34d1f62
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x562834630870 - core::fmt::rt::Argument::fmt::h40c8e52af43f1913
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/core/src/fmt/rt.rs:142:9
[INFO] [stderr]      5:     0x562834630870 - core::fmt::write::h7ebd148a9e2465ff
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/core/src/fmt/mod.rs:1117:17
[INFO] [stderr]      6:     0x5628345ff88f - std::io::Write::write_fmt::h10d8356a69904ae5
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/io/mod.rs:1763:15
[INFO] [stderr]      7:     0x562834602584 - std::sys_common::backtrace::_print::h78586332559d46a3
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      8:     0x562834602584 - std::sys_common::backtrace::print::h52739c684be26de7
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      9:     0x562834604737 - std::panicking::default_hook::{{closure}}::he40b9ce7ee3b47ca
[INFO] [stderr]     10:     0x56283460449f - std::panicking::default_hook::h209475733eec73f4
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panicking.rs:292:9
[INFO] [stderr]     11:     0x562834604bb8 - std::panicking::rust_panic_with_hook::h4c30e316acff406c
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panicking.rs:779:13
[INFO] [stderr]     12:     0x562834604a9e - std::panicking::begin_panic_handler::{{closure}}::hc4bf36516a03cc05
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panicking.rs:657:13
[INFO] [stderr]     13:     0x562834602c66 - std::sys_common::backtrace::__rust_end_short_backtrace::h12265e1c79695b79
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/sys_common/backtrace.rs:170:18
[INFO] [stderr]     14:     0x562834604802 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panicking.rs:645:5
[INFO] [stderr]     15:     0x562834238a85 - core::panicking::panic_fmt::hdfbd4a8abbd5c306
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/core/src/panicking.rs:72:14
[INFO] [stderr]     16:     0x562834239053 - core::result::unwrap_failed::h94bac82d5665d3f1
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/core/src/result.rs:1653:5
[INFO] [stderr]     17:     0x56283427353b - core::result::Result<T,E>::expect::he0e810bb467bc097
[INFO] [stderr]     18:     0x5628342799d0 - build_script_build::main::h0e25a673735a472e
[INFO] [stderr]     19:     0x562834272933 - core::ops::function::FnOnce::call_once::h6affa566a9f00550
[INFO] [stderr]     20:     0x56283427a2f6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h5b9aedceb7115723
[INFO] [stderr]     21:     0x5628342773e9 - std::rt::lang_start::{{closure}}::hfb78afa9b5642b73
[INFO] [stderr]     22:     0x5628345fb127 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h05e9df521768b010
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     23:     0x5628345fb127 - std::panicking::try::do_call::hc32862f923583c5d
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panicking.rs:552:40
[INFO] [stderr]     24:     0x5628345fb127 - std::panicking::try::h49efd5dc079e2443
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panicking.rs:516:19
[INFO] [stderr]     25:     0x5628345fb127 - std::panic::catch_unwind::h30a8b96e6544fff1
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panic.rs:142:14
[INFO] [stderr]     26:     0x5628345fb127 - std::rt::lang_start_internal::{{closure}}::h7bcb5a70fdde9eb4
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/rt.rs:148:48
[INFO] [stderr]     27:     0x5628345fb127 - std::panicking::try::do_call::hc9a63e53f07dabc9
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panicking.rs:552:40
[INFO] [stderr]     28:     0x5628345fb127 - std::panicking::try::h1e0ad22e261362c3
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panicking.rs:516:19
[INFO] [stderr]     29:     0x5628345fb127 - std::panic::catch_unwind::hfba18e64ff3ff6c4
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/panic.rs:142:14
[INFO] [stderr]     30:     0x5628345fb127 - std::rt::lang_start_internal::ha546740bcc1ea825
[INFO] [stderr]                                  at /rustc/50be22964035027398754e54cd3a497efb00f83e/library/std/src/rt.rs:148:20
[INFO] [stderr]     31:     0x5628342773c7 - std::rt::lang_start::h6dce65b0982f0799
[INFO] [stderr]     32:     0x56283427a2e5 - main
[INFO] [stderr]     33:     0x7f55ae908d90 - <unknown>
[INFO] [stderr]     34:     0x7f55ae908e40 - __libc_start_main
[INFO] [stderr]     35:     0x562834239355 - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "e6e8f4ba35615b026a57f3b1905da113277d31b42d00f7141317932ca94b888b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6e8f4ba35615b026a57f3b1905da113277d31b42d00f7141317932ca94b888b", kill_on_drop: false }`
[INFO] [stdout] e6e8f4ba35615b026a57f3b1905da113277d31b42d00f7141317932ca94b888b