[INFO] cloning repository https://github.com/azah/writebytes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/azah/writebytes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fazah%2Fwritebytes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fazah%2Fwritebytes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d1e4f4ba6573b8f719bf496a97b5607ed7d94ef7
[INFO] checking azah/writebytes against try#dbe54b90b471ee86a3b006973bf90c6cbb93415f for pr-102091
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fazah%2Fwritebytes" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/azah/writebytes on toolchain dbe54b90b471ee86a3b006973bf90c6cbb93415f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dbe54b90b471ee86a3b006973bf90c6cbb93415f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/azah/writebytes
[INFO] finished tweaking git repo https://github.com/azah/writebytes
[INFO] tweaked toml for git repo https://github.com/azah/writebytes written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/azah/writebytes already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dbe54b90b471ee86a3b006973bf90c6cbb93415f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:06bd2dc561ac9b9120e7d8112cca06cd3b1bded0ddb8515a4f6a39439d56c944" "/opt/rustwide/cargo-home/bin/cargo" "+dbe54b90b471ee86a3b006973bf90c6cbb93415f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c83a7a719f42f3a1ea394a2a63fcbb4924c57317e71a2d68fd4b62fb430faba2
[INFO] running `Command { std: "docker" "start" "-a" "c83a7a719f42f3a1ea394a2a63fcbb4924c57317e71a2d68fd4b62fb430faba2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c83a7a719f42f3a1ea394a2a63fcbb4924c57317e71a2d68fd4b62fb430faba2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c83a7a719f42f3a1ea394a2a63fcbb4924c57317e71a2d68fd4b62fb430faba2", kill_on_drop: false }`
[INFO] [stdout] c83a7a719f42f3a1ea394a2a63fcbb4924c57317e71a2d68fd4b62fb430faba2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:06bd2dc561ac9b9120e7d8112cca06cd3b1bded0ddb8515a4f6a39439d56c944" "/opt/rustwide/cargo-home/bin/cargo" "+dbe54b90b471ee86a3b006973bf90c6cbb93415f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4d0e8f2ce8c54ee5edf7a25b8cb63f992d94dd2900b57ded1548088029b91d6
[INFO] running `Command { std: "docker" "start" "-a" "e4d0e8f2ce8c54ee5edf7a25b8cb63f992d94dd2900b57ded1548088029b91d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr] error: failed to run custom build command for `proc-macro-error v1.0.2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/proc-macro-error-711601e08d39cc39/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rustc-cfg=use_fallback
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro-error-1.0.2/build.rs:7:44
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x561a19d2cc30 - std::backtrace_rs::backtrace::libunwind::trace::ha0d7edfdaf011033
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      1:     0x561a19d2cc30 - std::backtrace_rs::backtrace::trace_unsynchronized::hf63e316d6f6c5d77
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x561a19d2cc30 - std::sys_common::backtrace::_print_fmt::h94353a478745e1cd
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/sys_common/backtrace.rs:66:5
[INFO] [stderr]      3:     0x561a19d2cc30 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h239a46784b8d03c7
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/sys_common/backtrace.rs:45:22
[INFO] [stderr]      4:     0x561a19d4a20e - core::fmt::write::h8c8f2a6cf3f1e080
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/core/src/fmt/mod.rs:1202:17
[INFO] [stderr]      5:     0x561a19d29ec5 - std::io::Write::write_fmt::h33b851e0a2f204a3
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/io/mod.rs:1679:15
[INFO] [stderr]      6:     0x561a19d2e2b3 - std::sys_common::backtrace::_print::heb7b969448122efb
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/sys_common/backtrace.rs:48:5
[INFO] [stderr]      7:     0x561a19d2e2b3 - std::sys_common::backtrace::print::hc047394f1b624c64
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/sys_common/backtrace.rs:35:9
[INFO] [stderr]      8:     0x561a19d2e2b3 - std::panicking::default_hook::{{closure}}::h2d2c9c2af2f2d43e
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panicking.rs:267:22
[INFO] [stderr]      9:     0x561a19d2df9f - std::panicking::default_hook::h4270b5df2149cbb7
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panicking.rs:286:9
[INFO] [stderr]     10:     0x561a19d2e959 - std::panicking::rust_panic_with_hook::h94bae5e7ff66116a
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panicking.rs:669:13
[INFO] [stderr]     11:     0x561a19d2e811 - std::panicking::begin_panic_handler::{{closure}}::ha3102dba9cd4ebb2
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panicking.rs:558:13
[INFO] [stderr]     12:     0x561a19d2d0dc - std::sys_common::backtrace::__rust_end_short_backtrace::h4a324fc86e070396
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/sys_common/backtrace.rs:138:18
[INFO] [stderr]     13:     0x561a19d2e572 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panicking.rs:556:5
[INFO] [stderr]     14:     0x561a19cfea93 - core::panicking::panic_fmt::h527e4b71fe9767a8
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/core/src/panicking.rs:142:14
[INFO] [stderr]     15:     0x561a19cfe95d - core::panicking::panic::he202e9f33f384c39
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/core/src/panicking.rs:48:5
[INFO] [stderr]     16:     0x561a19cff06e - core::option::Option<T>::unwrap::h2a5143f3805a614c
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/core/src/option.rs:775:21
[INFO] [stderr]     17:     0x561a19cfef7c - build_script_build::main::hc750afc6ede8382b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro-error-1.0.2/build.rs:7:13
[INFO] [stderr]     18:     0x561a19cfeeab - core::ops::function::FnOnce::call_once::h692790cfafae9412
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/core/src/ops/function.rs:251:5
[INFO] [stderr]     19:     0x561a19cff01e - std::sys_common::backtrace::__rust_begin_short_backtrace::h8613553885814ba9
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/sys_common/backtrace.rs:122:18
[INFO] [stderr]     20:     0x561a19cff0e1 - std::rt::lang_start::{{closure}}::h7fcf034a342c81a1
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/rt.rs:166:18
[INFO] [stderr]     21:     0x561a19d275ef - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hf8d90901b1a646a4
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/core/src/ops/function.rs:286:13
[INFO] [stderr]     22:     0x561a19d275ef - std::panicking::try::do_call::hb3be6ff0691cc80c
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panicking.rs:464:40
[INFO] [stderr]     23:     0x561a19d275ef - std::panicking::try::h00e46f6023f74f4f
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panicking.rs:428:19
[INFO] [stderr]     24:     0x561a19d275ef - std::panic::catch_unwind::hae6042122ad6aa5e
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panic.rs:137:14
[INFO] [stderr]     25:     0x561a19d275ef - std::rt::lang_start_internal::{{closure}}::ha6671f3ce5a45cc6
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/rt.rs:148:48
[INFO] [stderr]     26:     0x561a19d275ef - std::panicking::try::do_call::he3ad6c8597d0e5b2
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panicking.rs:464:40
[INFO] [stderr]     27:     0x561a19d275ef - std::panicking::try::h5d36ec23cc5dcb28
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panicking.rs:428:19
[INFO] [stderr]     28:     0x561a19d275ef - std::panic::catch_unwind::hf8dae42ce9b6e084
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/panic.rs:137:14
[INFO] [stderr]     29:     0x561a19d275ef - std::rt::lang_start_internal::hda5b374777fad7e2
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/rt.rs:148:20
[INFO] [stderr]     30:     0x561a19cff0ba - std::rt::lang_start::h4aa49f98f43205da
[INFO] [stderr]                                  at /rustc/dbe54b90b471ee86a3b006973bf90c6cbb93415f/library/std/src/rt.rs:165:17
[INFO] [stderr]     31:     0x561a19cff001 - main
[INFO] [stderr]     32:     0x7f3a93bbb083 - __libc_start_main
[INFO] [stderr]     33:     0x561a19cfec6e - _start
[INFO] [stderr]     34:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e4d0e8f2ce8c54ee5edf7a25b8cb63f992d94dd2900b57ded1548088029b91d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4d0e8f2ce8c54ee5edf7a25b8cb63f992d94dd2900b57ded1548088029b91d6", kill_on_drop: false }`
[INFO] [stdout] e4d0e8f2ce8c54ee5edf7a25b8cb63f992d94dd2900b57ded1548088029b91d6