[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/58303c21c1efc4e7c9fd4764ff141788ea38d819 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farchshift%2Faccion" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/archshift/accion on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "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-3-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" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/archshift/dynstack`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded toml v0.5.7
[INFO] [stderr]   Downloaded derive-newtype v0.2.3
[INFO] [stderr]   Downloaded cc v1.0.61
[INFO] [stderr]   Downloaded disjoint-sets v0.4.2
[INFO] [stderr]   Downloaded static_assertions v0.3.4
[INFO] [stderr]   Downloaded tempfile v3.1.0
[INFO] [stderr]   Downloaded getrandom v0.1.15
[INFO] [stderr]   Downloaded serde_derive v1.0.117
[INFO] [stderr]   Downloaded serde v1.0.117
[INFO] [stderr]   Downloaded serde_json v1.0.59
[INFO] [stderr]   Downloaded cbindgen v0.15.0
[INFO] [stderr]   Downloaded libc v0.2.79
[INFO] [stderr]   Downloaded iced-x86 v1.9.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f91161e3ba0627bcabc6cdb95ebeccd9ebe7460f44ca9e9326c68b3d2bd5ce73
[INFO] running `Command { std: "docker" "start" "-a" "f91161e3ba0627bcabc6cdb95ebeccd9ebe7460f44ca9e9326c68b3d2bd5ce73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f91161e3ba0627bcabc6cdb95ebeccd9ebe7460f44ca9e9326c68b3d2bd5ce73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f91161e3ba0627bcabc6cdb95ebeccd9ebe7460f44ca9e9326c68b3d2bd5ce73", kill_on_drop: false }`
[INFO] [stdout] f91161e3ba0627bcabc6cdb95ebeccd9ebe7460f44ca9e9326c68b3d2bd5ce73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7cbafaf7fb6ddb58c4355104f5171871b15663413fb560a549e1120201ff935
[INFO] running `Command { std: "docker" "start" "-a" "b7cbafaf7fb6ddb58c4355104f5171871b15663413fb560a549e1120201ff935", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling getrandom v0.1.15
[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 serde_json v1.0.59
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling cbindgen v0.15.0
[INFO] [stderr]    Compiling itoa v0.4.6
[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 textwrap v0.11.0
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling iced-x86 v1.9.1
[INFO] [stderr]    Compiling cc v1.0.61
[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]     Checking static_assertions v0.3.4
[INFO] [stderr]    Compiling derive-newtype v0.2.3
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking disjoint-sets v0.4.2
[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 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-8c3f526691a36115/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:     0x62f7af56ec1a - std::backtrace_rs::backtrace::libunwind::trace::h97abfd8a85887826
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stderr]      1:     0x62f7af56ec1a - std::backtrace_rs::backtrace::trace_unsynchronized::h3fe33c3e2ffb6416
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x62f7af56ec1a - std::sys::backtrace::_print_fmt::hdf29e1ca2ba4cbbc
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x62f7af56ec1a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h731c3e1b756ff019
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x62f7af5990cb - core::fmt::rt::Argument::fmt::hdfecaf84742c5a76
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/core/src/fmt/rt.rs:177:76
[INFO] [stderr]      5:     0x62f7af5990cb - core::fmt::write::h9c97613a183100ea
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/core/src/fmt/mod.rs:1186:21
[INFO] [stderr]      6:     0x62f7af56aeb3 - std::io::Write::write_fmt::h7288d7c7dce2722e
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/io/mod.rs:1823:15
[INFO] [stderr]      7:     0x62f7af56ea62 - std::sys::backtrace::BacktraceLock::print::h2bc6f048c13121f8
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      8:     0x62f7af5702d5 - std::panicking::default_hook::{{closure}}::hde92e91975a101c0
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panicking.rs:268:22
[INFO] [stderr]      9:     0x62f7af570104 - std::panicking::default_hook::hd8d6e2273bfc5edc
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panicking.rs:295:9
[INFO] [stderr]     10:     0x62f7af570917 - std::panicking::rust_panic_with_hook::hb332f821833efd3b
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panicking.rs:801:13
[INFO] [stderr]     11:     0x62f7af5707b7 - std::panicking::begin_panic_handler::{{closure}}::h00065c7fd19dfc55
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panicking.rs:674:13
[INFO] [stderr]     12:     0x62f7af56f0f9 - std::sys::backtrace::__rust_end_short_backtrace::h10e475bd14bb8cb7
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/sys/backtrace.rs:170:18
[INFO] [stderr]     13:     0x62f7af570444 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panicking.rs:665:5
[INFO] [stderr]     14:     0x62f7af597073 - core::panicking::panic_fmt::h59e161f9c51d6f0e
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/core/src/panicking.rs:74:14
[INFO] [stderr]     15:     0x62f7af5974f6 - core::result::unwrap_failed::h54376d3d4b8f04d2
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/core/src/result.rs:1689:5
[INFO] [stderr]     16:     0x62f7af21345b - core::result::Result<T,E>::expect::h673bfd99c5223b35
[INFO] [stderr]     17:     0x62f7af21e454 - build_script_build::main::h1e1783efa70dbacb
[INFO] [stderr]     18:     0x62f7af214bc3 - core::ops::function::FnOnce::call_once::h701fc7a19aabc73b
[INFO] [stderr]     19:     0x62f7af211e26 - std::sys::backtrace::__rust_begin_short_backtrace::hfd606e64c4477b48
[INFO] [stderr]     20:     0x62f7af2196f9 - std::rt::lang_start::{{closure}}::hd1ab4086bce67988
[INFO] [stderr]     21:     0x62f7af566a60 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h00708edcd5cb0bf9
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     22:     0x62f7af566a60 - std::panicking::try::do_call::h3211acb5ef596e26
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panicking.rs:557:40
[INFO] [stderr]     23:     0x62f7af566a60 - std::panicking::try::hfc77046d1a78b97f
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panicking.rs:520:19
[INFO] [stderr]     24:     0x62f7af566a60 - std::panic::catch_unwind::h8cc6f9c887e41bb5
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panic.rs:348:14
[INFO] [stderr]     25:     0x62f7af566a60 - std::rt::lang_start_internal::{{closure}}::h1ae7a528cb090b94
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/rt.rs:143:48
[INFO] [stderr]     26:     0x62f7af566a60 - std::panicking::try::do_call::h7b341eaacca88c96
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panicking.rs:557:40
[INFO] [stderr]     27:     0x62f7af566a60 - std::panicking::try::h2190145387d00b24
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panicking.rs:520:19
[INFO] [stderr]     28:     0x62f7af566a60 - std::panic::catch_unwind::h39d0834a21ce2b28
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/panic.rs:348:14
[INFO] [stderr]     29:     0x62f7af566a60 - std::rt::lang_start_internal::hf1cb939424e8449c
[INFO] [stderr]                                  at /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/rt.rs:143:20
[INFO] [stderr]     30:     0x62f7af2196d7 - std::rt::lang_start::hea46daa2f12c62cf
[INFO] [stderr]     31:     0x62f7af21ed65 - main
[INFO] [stderr]     32:     0x7de719ac7d90 - <unknown>
[INFO] [stderr]     33:     0x7de719ac7e40 - __libc_start_main
[INFO] [stderr]     34:     0x62f7af1e03e5 - _start
[INFO] [stderr]     35:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "b7cbafaf7fb6ddb58c4355104f5171871b15663413fb560a549e1120201ff935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7cbafaf7fb6ddb58c4355104f5171871b15663413fb560a549e1120201ff935", kill_on_drop: false }`
[INFO] [stdout] b7cbafaf7fb6ddb58c4355104f5171871b15663413fb560a549e1120201ff935