[INFO] cloning repository https://github.com/02alexander/stack4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/02alexander/stack4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F02alexander%2Fstack4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F02alexander%2Fstack4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7722bb99a7e190daaa43a2ca056077c181da1bd2
[INFO] testing 02alexander/stack4 against beta-2025-09-21 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F02alexander%2Fstack4" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/02alexander/stack4
[INFO] finished tweaking git repo https://github.com/02alexander/stack4
[INFO] tweaked toml for git repo https://github.com/02alexander/stack4 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/02alexander/stack4 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/02alexander/stack4 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 12e31213ed1b61b1fda552e13dde21d71ac6c84176a31ab2a2d05ce363fb00fe
[INFO] running `Command { std: "docker" "start" "-a" "12e31213ed1b61b1fda552e13dde21d71ac6c84176a31ab2a2d05ce363fb00fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12e31213ed1b61b1fda552e13dde21d71ac6c84176a31ab2a2d05ce363fb00fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12e31213ed1b61b1fda552e13dde21d71ac6c84176a31ab2a2d05ce363fb00fe", kill_on_drop: false }`
[INFO] [stdout] 12e31213ed1b61b1fda552e13dde21d71ac6c84176a31ab2a2d05ce363fb00fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 30f11120b47b25726d3e4a0435095f235571a278c219777b371ef62da5461355
[INFO] running `Command { std: "docker" "start" "-a" "30f11120b47b25726d3e4a0435095f235571a278c219777b371ef62da5461355", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling byteorder v1.2.7
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling smallvec v0.6.6
[INFO] [stderr]    Compiling unicode-normalization v0.1.7
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling rand_core v0.2.2
[INFO] [stderr]    Compiling pear_codegen v0.1.2
[INFO] [stderr]    Compiling httparse v1.3.3
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling safemem v0.3.0
[INFO] [stderr]    Compiling owning_ref v0.4.0
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr] error: failed to run custom build command for `pear_codegen v0.1.2`
[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/pear_codegen-82ad10db327e88af/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Error: Pear requires a nightly or dev version of Rust.
[INFO] [stderr]   Installed version is: 1.91.0-beta.3 (2025-09-20). Minimum required: 1.31.0-nightly (2018-10-05).
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (454) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/pear_codegen-0.1.2/build.rs:31:13:
[INFO] [stderr]   Aborting compilation due to incompatible compiler.
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x642e849f2222 - 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:     0x642e849f2222 - 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:     0x642e849f2222 - std::sys::backtrace::_print_fmt::hf8d65ede198eeb54
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x642e849f2222 - <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:     0x642e84a0163f - core::fmt::rt::Argument::fmt::hef94184842aeafdd
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/rt.rs:173:76
[INFO] [stderr]      5:     0x642e84a0163f - core::fmt::write::hcf0c66b48a8fa606
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/mod.rs:1468:25
[INFO] [stderr]      6:     0x642e849c7d51 - std::io::default_write_fmt::h1ecb8c7cfa7da481
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x642e849c7d51 - std::io::Write::write_fmt::h051fe4a9e4fdbf48
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:1954:13
[INFO] [stderr]      8:     0x642e849d1762 - std::sys::backtrace::BacktraceLock::print::h07e5435aa717b414
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x642e849d344c - std::panicking::default_hook::{{closure}}::h91001850288db5f7
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:301:27
[INFO] [stderr]     10:     0x642e849d32a6 - std::panicking::default_hook::h2346dbb704ef5512
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:328:9
[INFO] [stderr]     11:     0x642e849d3ad5 - std::panicking::panic_with_hook::hd2b063a6090d23a4
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:834:13
[INFO] [stderr]     12:     0x642e849d319c - std::panicking::begin_panic::{{closure}}::h03764aec75fd6fbf
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:771:9
[INFO] [stderr]     13:     0x642e849d18a9 - std::sys::backtrace::__rust_end_short_backtrace::h840811b1dfa0dad5
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:174:18
[INFO] [stderr]     14:     0x642e849d316c - std::panicking::begin_panic::hcf2bdd8da61aefe8
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:770:5
[INFO] [stderr]     15:     0x642e849aa83f - build_script_build::main::h404cfc234b18371c
[INFO] [stderr]     16:     0x642e849ab3b3 - core::ops::function::FnOnce::call_once::h323ead8d566e2e6b
[INFO] [stderr]     17:     0x642e849ab236 - std::sys::backtrace::__rust_begin_short_backtrace::h5288d14cd645bd20
[INFO] [stderr]     18:     0x642e849ab219 - std::rt::lang_start::{{closure}}::h686a3c0a41c1b6a3
[INFO] [stderr]     19:     0x642e849c9730 - 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]     20:     0x642e849c9730 - std::panicking::catch_unwind::do_call::hf7e87675c3e14c23
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
[INFO] [stderr]     21:     0x642e849c9730 - std::panicking::catch_unwind::h26f0e342004b5114
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19
[INFO] [stderr]     22:     0x642e849c9730 - std::panic::catch_unwind::h9ee33ca17775d897
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14
[INFO] [stderr]     23:     0x642e849c9730 - std::rt::lang_start_internal::{{closure}}::h243ba3495fa13cf8
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/rt.rs:175:24
[INFO] [stderr]     24:     0x642e849c9730 - std::panicking::catch_unwind::do_call::h819db0a7788e7259
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
[INFO] [stderr]     25:     0x642e849c9730 - std::panicking::catch_unwind::h23e08fb4a7b9f405
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19
[INFO] [stderr]     26:     0x642e849c9730 - std::panic::catch_unwind::h7ca3d9eabb6135ff
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14
[INFO] [stderr]     27:     0x642e849c9730 - std::rt::lang_start_internal::h06ad7395f4fda8d7
[INFO] [stderr]                                  at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/rt.rs:171:5
[INFO] [stderr]     28:     0x642e849ab201 - std::rt::lang_start::h0249d5efd829e0b5
[INFO] [stderr]     29:     0x642e849abec5 - main
[INFO] [stderr]     30:     0x7a05fcaaf1ca - <unknown>
[INFO] [stderr]     31:     0x7a05fcaaf28b - __libc_start_main
[INFO] [stderr]     32:     0x642e849aa2e5 - _start
[INFO] [stderr]     33:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "30f11120b47b25726d3e4a0435095f235571a278c219777b371ef62da5461355", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30f11120b47b25726d3e4a0435095f235571a278c219777b371ef62da5461355", kill_on_drop: false }`
[INFO] [stdout] 30f11120b47b25726d3e4a0435095f235571a278c219777b371ef62da5461355
