[INFO] cloning repository https://github.com/lukewilliamboswell/roc-playground-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lukewilliamboswell/roc-playground-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukewilliamboswell%2Froc-playground-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukewilliamboswell%2Froc-playground-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6c88f3f9714a89719a056252744261c6c6770115
[INFO] testing lukewilliamboswell/roc-playground-experiment against beta-2025-09-21 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukewilliamboswell%2Froc-playground-experiment" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-6-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/lukewilliamboswell/roc-playground-experiment
[INFO] finished tweaking git repo https://github.com/lukewilliamboswell/roc-playground-experiment
[INFO] tweaked toml for git repo https://github.com/lukewilliamboswell/roc-playground-experiment written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lukewilliamboswell/roc-playground-experiment on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lukewilliamboswell/roc-playground-experiment 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" "+beta-2025-09-21" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 46cdefc6abe7bd72dc08ba1ae03bbadde9f2141f3d3f4349cebc5d9e6e9153be
[INFO] running `Command { std: "docker" "start" "-a" "46cdefc6abe7bd72dc08ba1ae03bbadde9f2141f3d3f4349cebc5d9e6e9153be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46cdefc6abe7bd72dc08ba1ae03bbadde9f2141f3d3f4349cebc5d9e6e9153be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46cdefc6abe7bd72dc08ba1ae03bbadde9f2141f3d3f4349cebc5d9e6e9153be", kill_on_drop: false }`
[INFO] [stdout] 46cdefc6abe7bd72dc08ba1ae03bbadde9f2141f3d3f4349cebc5d9e6e9153be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0fc8a27f2dc696972c2682ca484c3eca9bb520efa51a307eceab712353d33b49
[INFO] running `Command { std: "docker" "start" "-a" "0fc8a27f2dc696972c2682ca484c3eca9bb520efa51a307eceab712353d33b49", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling once_cell v1.20.2
[INFO] [stderr]    Compiling smallvec v1.13.2
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[INFO] [stderr]    Compiling radium v0.7.0
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[INFO] [stderr]    Compiling roc_region v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling itoa v1.0.14
[INFO] [stderr]    Compiling roc_ident v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
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[INFO] [stderr]    Compiling typed-arena v2.0.2
[INFO] [stderr]    Compiling tracing-core v0.1.33
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[INFO] [stderr]    Compiling encoding_rs v0.8.35
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[INFO] [stderr]    Compiling base64 v0.13.1
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[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling parking_lot v0.12.3
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[INFO] [stderr]    Compiling roc_wasm_module v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
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[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling roc_collections v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling tracing-appender v0.2.3
[INFO] [stderr]    Compiling roc_tracing v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling roc_module v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling roc_serialize v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling tinystr v0.7.6
[INFO] [stderr]    Compiling icu_collections v1.5.0
[INFO] [stderr]    Compiling icu_locid v1.5.0
[INFO] [stderr]    Compiling roc_parse v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling roc_builtins v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling roc_work v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling icu_provider v1.5.0
[INFO] [stderr]    Compiling roc_worker v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling tokio-rustls v0.24.1
[INFO] [stderr]    Compiling icu_locid_transform v1.5.0
[INFO] [stderr]    Compiling hyper v0.14.32
[INFO] [stderr]    Compiling icu_properties v1.5.1
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling byte-unit v4.0.19
[INFO] [stderr]    Compiling icu_normalizer v1.5.0
[INFO] [stderr]    Compiling hyper-rustls v0.24.2
[INFO] [stderr]    Compiling idna_adapter v1.2.0
[INFO] [stderr]    Compiling idna v1.0.3
[INFO] [stderr]    Compiling url v2.5.4
[INFO] [stderr]    Compiling roc_types v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling roc_fmt v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling roc_checkmate_schema v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr]    Compiling reqwest v0.11.27
[INFO] [stderr]    Compiling roc_checkmate v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)
[INFO] [stderr] error: failed to run custom build command for `roc_checkmate v0.0.1 (https://github.com/roc-lang/roc.git#255a388c)`
[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/roc_checkmate-faba3f7f23ac7551/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-changed=../checkmate_schema
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (3298) panicked at /opt/rustwide/cargo-home/git/checkouts/roc-5d067ed4e211e472/255a388/crates/compiler/checkmate/build.rs:12:6:
[INFO] [stderr]   called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x57c61d8badb2 - std::backtrace_rs::backtrace::libunwind::trace::hcab59e1e990fdc24
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x57c61d8badb2 - std::backtrace_rs::backtrace::trace_unsynchronized::he24cc57f3d2f47b7
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x57c61d8badb2 - std::sys::backtrace::_print_fmt::hf8d65ede198eeb54
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x57c61d8badb2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h67edf0e4d33c343c
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x57c61d8ca29f - core::fmt::rt::Argument::fmt::hef94184842aeafdd
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/rt.rs:173:76
[INFO] [stderr]      5:     0x57c61d8ca29f - core::fmt::write::hcf0c66b48a8fa606
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/mod.rs:1468:25
[INFO] [stderr]      6:     0x57c61d897cc1 - std::io::default_write_fmt::h1ecb8c7cfa7da481
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x57c61d897cc1 - std::io::Write::write_fmt::h051fe4a9e4fdbf48
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:1954:13
[INFO] [stderr]      8:     0x57c61d89dac2 - std::sys::backtrace::BacktraceLock::print::h07e5435aa717b414
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x57c61d89f5dc - std::panicking::default_hook::{{closure}}::h91001850288db5f7
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:301:27
[INFO] [stderr]     10:     0x57c61d89f436 - std::panicking::default_hook::h2346dbb704ef5512
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:328:9
[INFO] [stderr]     11:     0x57c61d89fc65 - std::panicking::panic_with_hook::hd2b063a6090d23a4
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:834:13
[INFO] [stderr]     12:     0x57c61d89fafa - std::panicking::panic_handler::{{closure}}::he666d95f139a333e
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:707:13
[INFO] [stderr]     13:     0x57c61d89dbf9 - std::sys::backtrace::__rust_end_short_backtrace::h631ad224854ebee5
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:174:18
[INFO] [stderr]     14:     0x57c61d88c63d - __rustc[1d67440d6e82e4f]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:698:5
[INFO] [stderr]     15:     0x57c61d8cd9b0 - core::panicking::panic_fmt::h420ddb7fd73daf53
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panicking.rs:75:14
[INFO] [stderr]     16:     0x57c61d8ccf86 - core::result::unwrap_failed::hdde076be853d034f
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/result.rs:1855:5
[INFO] [stderr]     17:     0x57c61d7fbc72 - build_script_build::main::hc08b52133c6edd9d
[INFO] [stderr]     18:     0x57c61d7fbf73 - core::ops::function::FnOnce::call_once::h372bf4a2d5eedc58
[INFO] [stderr]     19:     0x57c61d7fbea6 - std::sys::backtrace::__rust_begin_short_backtrace::h3b93b04d51cf6860
[INFO] [stderr]     20:     0x57c61d7fbe89 - std::rt::lang_start::{{closure}}::h18c6e8794a6e2465
[INFO] [stderr]     21:     0x57c61d899530 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h4967fb77e0dfb65c
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     22:     0x57c61d899530 - std::panicking::catch_unwind::do_call::hf7e87675c3e14c23
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
[INFO] [stderr]     23:     0x57c61d899530 - std::panicking::catch_unwind::h26f0e342004b5114
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19
[INFO] [stderr]     24:     0x57c61d899530 - std::panic::catch_unwind::h9ee33ca17775d897
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14
[INFO] [stderr]     25:     0x57c61d899530 - std::rt::lang_start_internal::{{closure}}::h243ba3495fa13cf8
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/rt.rs:175:24
[INFO] [stderr]     26:     0x57c61d899530 - std::panicking::catch_unwind::do_call::h819db0a7788e7259
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
[INFO] [stderr]     27:     0x57c61d899530 - std::panicking::catch_unwind::h23e08fb4a7b9f405
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19
[INFO] [stderr]     28:     0x57c61d899530 - std::panic::catch_unwind::h7ca3d9eabb6135ff
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14
[INFO] [stderr]     29:     0x57c61d899530 - std::rt::lang_start_internal::h06ad7395f4fda8d7
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/rt.rs:171:5
[INFO] [stderr]     30:     0x57c61d7fbe71 - std::rt::lang_start::hc74e8ce9d51e0b46
[INFO] [stderr]     31:     0x57c61d8018b5 - main
[INFO] [stderr]     32:     0x7268c4d4a1ca - <unknown>
[INFO] [stderr]     33:     0x7268c4d4a28b - __libc_start_main
[INFO] [stderr]     34:     0x57c61d7fa595 - _start
[INFO] [stderr]     35:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0fc8a27f2dc696972c2682ca484c3eca9bb520efa51a307eceab712353d33b49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fc8a27f2dc696972c2682ca484c3eca9bb520efa51a307eceab712353d33b49", kill_on_drop: false }`
[INFO] [stdout] 0fc8a27f2dc696972c2682ca484c3eca9bb520efa51a307eceab712353d33b49