[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] checking archshift/accion against try#4a23c45c7893f1416456144e3883cc48ea91722e for pr-82322
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farchshift%2Faccion" "/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/archshift/accion on toolchain 4a23c45c7893f1416456144e3883cc48ea91722e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "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/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: "/workspace/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/archshift/dynstack`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded static_assertions v0.3.4
[INFO] [stderr]   Downloaded serde v1.0.117
[INFO] [stderr]   Downloaded serde_derive v1.0.117
[INFO] [stderr]   Downloaded syn v1.0.48
[INFO] [stderr]   Downloaded serde_json v1.0.59
[INFO] [stderr]   Downloaded cbindgen v0.15.0
[INFO] [stderr]   Downloaded cc v1.0.61
[INFO] [stderr]   Downloaded derive-newtype v0.2.3
[INFO] [stderr]   Downloaded toml v0.5.7
[INFO] [stderr]   Downloaded disjoint-sets v0.4.2
[INFO] [stderr]   Downloaded iced-x86 v1.9.1
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e8eb83374f30df247d82e961b2bfeec4a7ddb391d9760f418e3cda12e6a802f0
[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" "e8eb83374f30df247d82e961b2bfeec4a7ddb391d9760f418e3cda12e6a802f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8eb83374f30df247d82e961b2bfeec4a7ddb391d9760f418e3cda12e6a802f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8eb83374f30df247d82e961b2bfeec4a7ddb391d9760f418e3cda12e6a802f0", kill_on_drop: false }`
[INFO] [stdout] e8eb83374f30df247d82e961b2bfeec4a7ddb391d9760f418e3cda12e6a802f0
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d1800ed13dc3e5738698f01aa0edc7176e124b718f66b314f82683b245a7bab
[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" "8d1800ed13dc3e5738698f01aa0edc7176e124b718f66b314f82683b245a7bab", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling cbindgen v0.15.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling dynstack v0.4.0 (https://github.com/archshift/dynstack?rev=7bba8e808b907c6a0d70e648fb0bc5672cf87c22#7bba8e80)
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking disjoint-sets v0.4.2
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling iced-x86 v1.9.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling derive-newtype v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling serde_json v1.0.59
[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] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/accion-eb5739fe70ccbd89/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Could not spawn flex!: Os { code: 2, kind: NotFound, message: "No such file or directory" }', build.rs:47:10
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55f5d8ba8af0 - std::backtrace_rs::backtrace::libunwind::trace::hb4de9797f80b7b8c
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55f5d8ba8af0 - std::backtrace_rs::backtrace::trace_unsynchronized::h59566d0bd20efff7
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55f5d8ba8af0 - std::sys_common::backtrace::_print_fmt::hcfa5ce6be50275d4
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55f5d8ba8af0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd8c307a38b9bab04
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55f5d8bd1afc - core::fmt::write::h3868db8542c90941
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/core/src/fmt/mod.rs:1092:17
[INFO] [stderr]      5:     0x55f5d8ba4532 - std::io::Write::write_fmt::hab90295d5a0f197d
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/io/mod.rs:1568:15
[INFO] [stderr]      6:     0x55f5d8bab405 - std::sys_common::backtrace::_print::h19224910b8700cf1
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55f5d8bab405 - std::sys_common::backtrace::print::h25dedfa68c5fb84a
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55f5d8bab405 - std::panicking::default_hook::{{closure}}::h12c5765653a72a42
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55f5d8baaeb3 - std::panicking::default_hook::he65cee71c4209f0c
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55f5d8babba1 - std::panicking::rust_panic_with_hook::h01a674d863fe0d8a
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x55f5d8bab6e7 - std::panicking::begin_panic_handler::{{closure}}::h9b9fecf185178864
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/panicking.rs:497:13
[INFO] [stderr]     12:     0x55f5d8ba8f8c - std::sys_common::backtrace::__rust_end_short_backtrace::h57be46a42dc7f24b
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55f5d8bab649 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x55f5d8bcf901 - core::panicking::panic_fmt::h20225113c4a2f8fd
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x55f5d8bcf723 - core::option::expect_none_failed::hc6d6d4cea4fdc285
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/core/src/option.rs:1300:5
[INFO] [stderr]     16:     0x55f5d8653947 - core::result::Result<T,E>::expect::hff2143342d59f90a
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/core/src/result.rs:997:23
[INFO] [stderr]     17:     0x55f5d8655136 - build_script_build::main::h20f3f96ec94fc90c
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:42:21
[INFO] [stderr]     18:     0x55f5d86522fb - core::ops::function::FnOnce::call_once::h989cc9eec7583d5e
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     19:     0x55f5d867e0ee - std::sys_common::backtrace::__rust_begin_short_backtrace::h25533039df39f603
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     20:     0x55f5d8656031 - std::rt::lang_start::{{closure}}::h16222195acced754
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/rt.rs:66:18
[INFO] [stderr]     21:     0x55f5d8bac0aa - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h2c4fd7d4128112a8
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     22:     0x55f5d8bac0aa - std::panicking::try::do_call::h41fb7dbbbe7bece6
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/panicking.rs:379:40
[INFO] [stderr]     23:     0x55f5d8bac0aa - std::panicking::try::hd38008ccba72bce1
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/panicking.rs:343:19
[INFO] [stderr]     24:     0x55f5d8bac0aa - std::panic::catch_unwind::h057e765cd60f2d13
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/panic.rs:431:14
[INFO] [stderr]     25:     0x55f5d8bac0aa - std::rt::lang_start_internal::hdb9d0b9d2cdcda8b
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/rt.rs:51:25
[INFO] [stderr]     26:     0x55f5d8656007 - std::rt::lang_start::hab28b7514749a3b3
[INFO] [stderr]                                  at /rustc/4a23c45c7893f1416456144e3883cc48ea91722e/library/std/src/rt.rs:65:5
[INFO] [stderr]     27:     0x55f5d8655bca - main
[INFO] [stderr]     28:     0x7f83a2f7a0b3 - __libc_start_main
[INFO] [stderr]     29:     0x55f5d862c0de - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "8d1800ed13dc3e5738698f01aa0edc7176e124b718f66b314f82683b245a7bab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d1800ed13dc3e5738698f01aa0edc7176e124b718f66b314f82683b245a7bab", kill_on_drop: false }`
[INFO] [stdout] 8d1800ed13dc3e5738698f01aa0edc7176e124b718f66b314f82683b245a7bab