[INFO] cloning repository https://github.com/jFransham/rust-ruby-static-site-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jFransham/rust-ruby-static-site-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FjFransham%2Frust-ruby-static-site-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FjFransham%2Frust-ruby-static-site-generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8022b95fbd4e1e49aa625c8ea6b3203d9a774a3e
[INFO] checking jFransham/rust-ruby-static-site-generator against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FjFransham%2Frust-ruby-static-site-generator" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jFransham/rust-ruby-static-site-generator on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jFransham/rust-ruby-static-site-generator
[INFO] finished tweaking git repo https://github.com/jFransham/rust-ruby-static-site-generator
[INFO] tweaked toml for git repo https://github.com/jFransham/rust-ruby-static-site-generator written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/jFransham/rust-ruby-static-site-generator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a7e332913086ab50943bad474e61fcf14cf2759677b1c02ccdb962958e002fd
[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" "9a7e332913086ab50943bad474e61fcf14cf2759677b1c02ccdb962958e002fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a7e332913086ab50943bad474e61fcf14cf2759677b1c02ccdb962958e002fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a7e332913086ab50943bad474e61fcf14cf2759677b1c02ccdb962958e002fd", kill_on_drop: false }`
[INFO] [stdout] 9a7e332913086ab50943bad474e61fcf14cf2759677b1c02ccdb962958e002fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f161f92ce80f02a150cd420ecefa5ec7628c8c42b8859c2a64ed5ea0085d2bf3
[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" "f161f92ce80f02a150cd420ecefa5ec7628c8c42b8859c2a64ed5ea0085d2bf3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.15
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling walkdir v0.1.6
[INFO] [stderr]    Compiling filetime v0.1.10
[INFO] [stderr]    Compiling xattr v0.1.10
[INFO] [stderr]    Compiling tar v0.4.8
[INFO] [stderr]    Compiling mrusty v0.5.1
[INFO] [stderr] error: failed to run custom build command for `mrusty v0.5.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/mrusty-0291aa7628dca842/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Custom { kind: Other, error: TarError { desc: "failed to create `target`", io: Os { code: 30, kind: Other, message: "Read-only file system" } } }', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mrusty-0.5.1/build.rs:26:30
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55fa4ea27420 - std::backtrace_rs::backtrace::libunwind::trace::hec7eaac9435d3512
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55fa4ea27420 - std::backtrace_rs::backtrace::trace_unsynchronized::h42791b8fa12b7daa
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55fa4ea27420 - std::sys_common::backtrace::_print_fmt::h3da3ebe04fb665a8
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55fa4ea27420 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he40bcdde3c4491cd
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55fa4ea474df - core::fmt::write::h2c729149c08098ab
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/core/src/fmt/mod.rs:1094:17
[INFO] [stderr]      5:     0x55fa4ea24135 - std::io::Write::write_fmt::h28e0f2f58b8d7b7e
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/io/mod.rs:1580:15
[INFO] [stderr]      6:     0x55fa4ea291db - std::sys_common::backtrace::_print::h7f0223b1e3d898fc
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55fa4ea291db - std::sys_common::backtrace::print::h58edd634a14c2d4c
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55fa4ea291db - std::panicking::default_hook::{{closure}}::h71657a7591430164
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55fa4ea28cbd - std::panicking::default_hook::hcdf4eb5db072c85b
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55fa4ea2978d - std::panicking::rust_panic_with_hook::hfb91e961ffb5b8e0
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x55fa4ea29387 - std::panicking::begin_panic_handler::{{closure}}::h984d540e84311150
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/panicking.rs:497:13
[INFO] [stderr]     12:     0x55fa4ea278bc - std::sys_common::backtrace::__rust_end_short_backtrace::h32354258ff2aecd1
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55fa4ea292e9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x55fa4e9b2161 - core::panicking::panic_fmt::he3827412471ccbb1
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x55fa4e9b21f3 - core::result::unwrap_failed::h6e66654d198da7bd
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/core/src/result.rs:1355:5
[INFO] [stderr]     16:     0x55fa4e9f245e - core::result::Result<T,E>::unwrap::h7c595bb69ae5d2f4
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/core/src/result.rs:1037:23
[INFO] [stderr]     17:     0x55fa4e9b2c56 - build_script_build::main::h64da6d397e29b394
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mrusty-0.5.1/build.rs:26:5
[INFO] [stderr]     18:     0x55fa4e9b31db - core::ops::function::FnOnce::call_once::h4e17543cdb8f0f68
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     19:     0x55fa4e9b310e - std::sys_common::backtrace::__rust_begin_short_backtrace::h64eab08fa5663d1d
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     20:     0x55fa4e9b3b01 - std::rt::lang_start::{{closure}}::h8258ed2f0a6423c5
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/rt.rs:66:18
[INFO] [stderr]     21:     0x55fa4ea29b8a - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hd5953dadf0bc8f54
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     22:     0x55fa4ea29b8a - std::panicking::try::do_call::h23b369f1996fb7d4
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/panicking.rs:379:40
[INFO] [stderr]     23:     0x55fa4ea29b8a - std::panicking::try::he017ee9ed6bce192
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/panicking.rs:343:19
[INFO] [stderr]     24:     0x55fa4ea29b8a - std::panic::catch_unwind::hbfb892340a78b30d
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/panic.rs:431:14
[INFO] [stderr]     25:     0x55fa4ea29b8a - std::rt::lang_start_internal::hce6e4c0ce56abb51
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/rt.rs:51:25
[INFO] [stderr]     26:     0x55fa4e9b3ae0 - std::rt::lang_start::h0d5175a649a8157e
[INFO] [stderr]                                  at /rustc/836c31742687ba4e2f857b5b698e1e9e6b67619c/library/std/src/rt.rs:65:5
[INFO] [stderr]     27:     0x55fa4e9b30fc - main
[INFO] [stderr]     28:     0x7fbe819350b3 - __libc_start_main
[INFO] [stderr]     29:     0x55fa4e9b289e - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "f161f92ce80f02a150cd420ecefa5ec7628c8c42b8859c2a64ed5ea0085d2bf3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f161f92ce80f02a150cd420ecefa5ec7628c8c42b8859c2a64ed5ea0085d2bf3", kill_on_drop: false }`
[INFO] [stdout] f161f92ce80f02a150cd420ecefa5ec7628c8c42b8859c2a64ed5ea0085d2bf3