[INFO] cloning repository https://github.com/casimir/ufind
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/casimir/ufind" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcasimir%2Fufind", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcasimir%2Fufind'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f43e2ac87871d2aa1c40b1b5566b31ff1f17887b
[INFO] checking casimir/ufind against master#4d1bd0db7f489b22c6d8aa2385937a95412c015b for pr-114682
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcasimir%2Fufind" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/casimir/ufind on toolchain 4d1bd0db7f489b22c6d8aa2385937a95412c015b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/casimir/ufind
[INFO] finished tweaking git repo https://github.com/casimir/ufind
[INFO] tweaked toml for git repo https://github.com/casimir/ufind written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/casimir/ufind 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" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "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] checking casimir/ufind against try#785364c7e5e0804473a3fddfb579798ea14e3493 for pr-114682
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcasimir%2Fufind" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/casimir/ufind on toolchain 785364c7e5e0804473a3fddfb579798ea14e3493
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/casimir/ufind
[INFO] finished tweaking git repo https://github.com/casimir/ufind
[INFO] tweaked toml for git repo https://github.com/casimir/ufind written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/casimir/ufind 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" "+785364c7e5e0804473a3fddfb579798ea14e3493" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking casimir/ufind against try#785364c7e5e0804473a3fddfb579798ea14e3493 for pr-114682
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcasimir%2Fufind" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/casimir/ufind on toolchain 785364c7e5e0804473a3fddfb579798ea14e3493
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/casimir/ufind
[INFO] finished tweaking git repo https://github.com/casimir/ufind
[INFO] tweaked toml for git repo https://github.com/casimir/ufind written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/casimir/ufind 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" "+785364c7e5e0804473a3fddfb579798ea14e3493" "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 vec_map v0.7.0
[INFO] [stderr]   Downloaded unicode-segmentation v1.1.0
[INFO] [stderr]   Downloaded clap v2.23.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+785364c7e5e0804473a3fddfb579798ea14e3493" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 897e0ca69ac3b2cd6f8881147a761e4fd83ecc84b039c02e77e3030f4fa50b33
[INFO] running `Command { std: "docker" "start" "-a" "897e0ca69ac3b2cd6f8881147a761e4fd83ecc84b039c02e77e3030f4fa50b33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "897e0ca69ac3b2cd6f8881147a761e4fd83ecc84b039c02e77e3030f4fa50b33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "897e0ca69ac3b2cd6f8881147a761e4fd83ecc84b039c02e77e3030f4fa50b33", kill_on_drop: false }`
[INFO] [stdout] 897e0ca69ac3b2cd6f8881147a761e4fd83ecc84b039c02e77e3030f4fa50b33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+785364c7e5e0804473a3fddfb579798ea14e3493" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc252beaf4c78471630468104f76e89f50b284fbd6e48f219dece7b58a75166a
[INFO] running `Command { std: "docker" "start" "-a" "cc252beaf4c78471630468104f76e89f50b284fbd6e48f219dece7b58a75166a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.21
[INFO] [stderr]    Compiling vec_map v0.7.0
[INFO] [stderr]    Compiling bitflags v0.8.2
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling unicode-segmentation v1.1.0
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling atty v0.2.2
[INFO] [stderr]    Compiling term_size v0.2.3
[INFO] [stderr]    Compiling clap v2.23.1
[INFO] [stderr]    Compiling ufind v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `ufind v0.3.1 (/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/ufind-61e90cbcce667be8/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/clap-2.23.1/src/app/parser.rs:113:25:
[INFO] [stderr]   couldn't create completion file: read-only filesystem or storage medium
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x560236abbe5c - std::backtrace_rs::backtrace::libunwind::trace::h9789de5fcc494f39
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stderr]      1:     0x560236abbe5c - std::backtrace_rs::backtrace::trace_unsynchronized::ha6083f64b534560a
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x560236abbe5c - std::sys_common::backtrace::_print_fmt::hca82da572808fb58
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stderr]      3:     0x560236abbe5c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hdb2ed8d6897c333a
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x560236adbb80 - core::fmt::rt::Argument::fmt::h250ce007264abde4
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/core/src/fmt/rt.rs:142:9
[INFO] [stderr]      5:     0x560236adbb80 - core::fmt::write::he9913548e4982ad0
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/core/src/fmt/mod.rs:1120:17
[INFO] [stderr]      6:     0x560236aba12f - std::io::Write::write_fmt::h1e4c28dcba2b3367
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/io/mod.rs:1810:15
[INFO] [stderr]      7:     0x560236abbc44 - std::sys_common::backtrace::_print::he7a042d62e9ec33d
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      8:     0x560236abbc44 - std::sys_common::backtrace::print::h40fa6d4a866b97b4
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      9:     0x560236abd157 - std::panicking::default_hook::{{closure}}::h7f0560eafc245a7c
[INFO] [stderr]     10:     0x560236abcebf - std::panicking::default_hook::hfd695e1920cd982e
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panicking.rs:292:9
[INFO] [stderr]     11:     0x560236abd5d8 - std::panicking::rust_panic_with_hook::hc0fcd647af5eb061
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panicking.rs:779:13
[INFO] [stderr]     12:     0x560236abd4be - std::panicking::begin_panic_handler::{{closure}}::hbd1eb336070930d3
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panicking.rs:657:13
[INFO] [stderr]     13:     0x560236abc326 - std::sys_common::backtrace::__rust_end_short_backtrace::h1eefd8026e5b6577
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stderr]     14:     0x560236abd222 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panicking.rs:645:5
[INFO] [stderr]     15:     0x560236a5bf25 - core::panicking::panic_fmt::h178e74ce775be6d6
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/core/src/panicking.rs:72:14
[INFO] [stderr]     16:     0x560236a5e7af - clap::app::parser::Parser::gen_completions::h7ed9c06db6720e3d
[INFO] [stderr]     17:     0x560236a5cb38 - clap::app::App::gen_completions::ha6a6caef172c2a92
[INFO] [stderr]     18:     0x560236a5db72 - build_script_build::main::h5d396c7b272b921e
[INFO] [stderr]     19:     0x560236a5ce73 - core::ops::function::FnOnce::call_once::h5b64f39430a5ce3d
[INFO] [stderr]     20:     0x560236a5c826 - std::sys_common::backtrace::__rust_begin_short_backtrace::hbc758a1ea3cfe6ab
[INFO] [stderr]     21:     0x560236a5c969 - std::rt::lang_start::{{closure}}::h0ed7ac214a3b8508
[INFO] [stderr]     22:     0x560236ab7477 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hd85bd4e6518d0bb8
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     23:     0x560236ab7477 - std::panicking::try::do_call::h7f13924d4fb67a0d
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panicking.rs:552:40
[INFO] [stderr]     24:     0x560236ab7477 - std::panicking::try::h9e27be4af101a30d
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panicking.rs:516:19
[INFO] [stderr]     25:     0x560236ab7477 - std::panic::catch_unwind::h3519b91c36f56574
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panic.rs:142:14
[INFO] [stderr]     26:     0x560236ab7477 - std::rt::lang_start_internal::{{closure}}::hb39bed8b01a0a169
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/rt.rs:148:48
[INFO] [stderr]     27:     0x560236ab7477 - std::panicking::try::do_call::hfbc1ccc440a3db03
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panicking.rs:552:40
[INFO] [stderr]     28:     0x560236ab7477 - std::panicking::try::h02821aa69a013e27
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panicking.rs:516:19
[INFO] [stderr]     29:     0x560236ab7477 - std::panic::catch_unwind::hed6681082d7b3d4e
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/panic.rs:142:14
[INFO] [stderr]     30:     0x560236ab7477 - std::rt::lang_start_internal::hbff7c6fd005b9bf2
[INFO] [stderr]                                  at /rustc/785364c7e5e0804473a3fddfb579798ea14e3493/library/std/src/rt.rs:148:20
[INFO] [stderr]     31:     0x560236a5c947 - std::rt::lang_start::h645fdcabf71fe84c
[INFO] [stderr]     32:     0x560236a5dc75 - main
[INFO] [stderr]     33:     0x7f98841a4d90 - <unknown>
[INFO] [stderr]     34:     0x7f98841a4e40 - __libc_start_main
[INFO] [stderr]     35:     0x560236a5c755 - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "cc252beaf4c78471630468104f76e89f50b284fbd6e48f219dece7b58a75166a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc252beaf4c78471630468104f76e89f50b284fbd6e48f219dece7b58a75166a", kill_on_drop: false }`
[INFO] [stdout] cc252beaf4c78471630468104f76e89f50b284fbd6e48f219dece7b58a75166a