[INFO] cloning repository https://github.com/tectin0/digraph-to-umlaut
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tectin0/digraph-to-umlaut" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftectin0%2Fdigraph-to-umlaut", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftectin0%2Fdigraph-to-umlaut'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 28d7afdbeff761493ffc891f8b4fdb13e758daf7
[INFO] checking tectin0/digraph-to-umlaut against master#3350c1eb3fd8fe1bee1ed4c76944d707bd256876 for pr-140558
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftectin0%2Fdigraph-to-umlaut" "/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/tectin0/digraph-to-umlaut on toolchain 3350c1eb3fd8fe1bee1ed4c76944d707bd256876
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tectin0/digraph-to-umlaut
[INFO] finished tweaking git repo https://github.com/tectin0/digraph-to-umlaut
[INFO] tweaked toml for git repo https://github.com/tectin0/digraph-to-umlaut written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tectin0/digraph-to-umlaut 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" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92f1bd3ba6d1ed7ebeac381c5987e48186963bd0ad3e8c689ea952a6c8f46bde
[INFO] running `Command { std: "docker" "start" "-a" "92f1bd3ba6d1ed7ebeac381c5987e48186963bd0ad3e8c689ea952a6c8f46bde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92f1bd3ba6d1ed7ebeac381c5987e48186963bd0ad3e8c689ea952a6c8f46bde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92f1bd3ba6d1ed7ebeac381c5987e48186963bd0ad3e8c689ea952a6c8f46bde", kill_on_drop: false }`
[INFO] [stdout] 92f1bd3ba6d1ed7ebeac381c5987e48186963bd0ad3e8c689ea952a6c8f46bde
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30b85c0835fcb09aaed3c9ea29b61217a97263a20b6ea243599047716e24f5c7
[INFO] running `Command { std: "docker" "start" "-a" "30b85c0835fcb09aaed3c9ea29b61217a97263a20b6ea243599047716e24f5c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.166
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking hashbrown v0.14.0
[INFO] [stderr]     Checking equivalent v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking winnow v0.4.7
[INFO] [stderr]    Compiling digraph-to-umlaut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr] error: failed to run custom build command for `digraph-to-umlaut 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/digraph-to-umlaut-4ff7e4886ce4f85d/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' panicked at build.rs:20:35:
[INFO] [stderr]   Failed to create build directory: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x58563f4e9602 - std::backtrace_rs::backtrace::libunwind::trace::h563a2beac1baee5d
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x58563f4e9602 - std::backtrace_rs::backtrace::trace_unsynchronized::hdc700c8ea914f702
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x58563f4e9602 - std::sys::backtrace::_print_fmt::h1b39b2ce6204063a
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x58563f4e9602 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h542d155fb00771a6
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x58563f505e23 - core::fmt::rt::Argument::fmt::h387f243e796dbb39
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/core/src/fmt/rt.rs:179:76
[INFO] [stderr]      5:     0x58563f505e23 - core::fmt::write::h5c20ef0aafe2b529
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/core/src/fmt/mod.rs:1481:25
[INFO] [stderr]      6:     0x58563f4e6d33 - std::io::default_write_fmt::hcd6191d430111ac5
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x58563f4e6d33 - std::io::Write::write_fmt::hac11ffd732faa171
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/io/mod.rs:1914:13
[INFO] [stderr]      8:     0x58563f4e9452 - std::sys::backtrace::BacktraceLock::print::h47f90f237b73cbf4
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x58563f4ead02 - std::panicking::default_hook::{{closure}}::h6282c72a1387d25f
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:300:22
[INFO] [stderr]     10:     0x58563f4eab05 - std::panicking::default_hook::he6b494ff3c83ead4
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:327:9
[INFO] [stderr]     11:     0x58563f4eb5d2 - std::panicking::rust_panic_with_hook::h149b08272aeb16bc
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:833:13
[INFO] [stderr]     12:     0x58563f4eb46a - std::panicking::begin_panic_handler::{{closure}}::hcdbe86989a0ba44a
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:706:13
[INFO] [stderr]     13:     0x58563f4e9af9 - std::sys::backtrace::__rust_end_short_backtrace::hf8d59804c2387dc6
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/sys/backtrace.rs:168:18
[INFO] [stderr]     14:     0x58563f4eb0fd - __rustc[2d4870ff425ddf61]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:697:5
[INFO] [stderr]     15:     0x58563f5050d0 - core::panicking::panic_fmt::he8c25f98fc794a04
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/core/src/panicking.rs:75:14
[INFO] [stderr]     16:     0x58563f505466 - core::result::unwrap_failed::hd2f81870133ab398
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/core/src/result.rs:1732:5
[INFO] [stderr]     17:     0x58563f4c6340 - core::result::Result<T,E>::expect::h232dc51aa14014e3
[INFO] [stderr]     18:     0x58563f4c7863 - build_script_build::main::h26a663dda9be5f9d
[INFO] [stderr]     19:     0x58563f4c5a83 - core::ops::function::FnOnce::call_once::hfb62b5879071606d
[INFO] [stderr]     20:     0x58563f4c5476 - std::sys::backtrace::__rust_begin_short_backtrace::h3d3e2cefdee27850
[INFO] [stderr]     21:     0x58563f4c53d9 - std::rt::lang_start::{{closure}}::hefdd253b19ea6b3f
[INFO] [stderr]     22:     0x58563f4e3b40 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h7076474eed8656b3
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     23:     0x58563f4e3b40 - std::panicking::try::do_call::hbd0cac780971e5ed
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:589:40
[INFO] [stderr]     24:     0x58563f4e3b40 - std::panicking::try::h3cbc02d8aba51c73
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:552:19
[INFO] [stderr]     25:     0x58563f4e3b40 - std::panic::catch_unwind::h6b36eecd966bb8ff
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panic.rs:359:14
[INFO] [stderr]     26:     0x58563f4e3b40 - std::rt::lang_start_internal::{{closure}}::hdbe6db4edf3386dc
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/rt.rs:168:24
[INFO] [stderr]     27:     0x58563f4e3b40 - std::panicking::try::do_call::h510fcf1b84eec1a9
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:589:40
[INFO] [stderr]     28:     0x58563f4e3b40 - std::panicking::try::h3dc1c9c2c726907f
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:552:19
[INFO] [stderr]     29:     0x58563f4e3b40 - std::panic::catch_unwind::haa7a05f30e57423e
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panic.rs:359:14
[INFO] [stderr]     30:     0x58563f4e3b40 - std::rt::lang_start_internal::h85e7d85bc582d158
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/rt.rs:164:5
[INFO] [stderr]     31:     0x58563f4c53c1 - std::rt::lang_start::ha55663855695f26b
[INFO] [stderr]     32:     0x58563f4c8a65 - main
[INFO] [stderr]     33:     0x715aa81371ca - <unknown>
[INFO] [stderr]     34:     0x715aa813728b - __libc_start_main
[INFO] [stderr]     35:     0x58563f4c48a5 - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "30b85c0835fcb09aaed3c9ea29b61217a97263a20b6ea243599047716e24f5c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30b85c0835fcb09aaed3c9ea29b61217a97263a20b6ea243599047716e24f5c7", kill_on_drop: false }`
[INFO] [stdout] 30b85c0835fcb09aaed3c9ea29b61217a97263a20b6ea243599047716e24f5c7