[INFO] fetching crate labhub 0.1.10...
[INFO] testing labhub-0.1.10 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate labhub 0.1.10 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate labhub 0.1.10
[INFO] finished tweaking crates.io crate labhub 0.1.10
[INFO] tweaked toml for crates.io crate labhub 0.1.10 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate labhub 0.1.10 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate labhub 0.1.10 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-bidi v0.3.4
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 05cbe8c0f7edb53fb48b40a8c277afb38cb0741ef1397b09098e09e2dd6d0dca
[INFO] running `Command { std: "docker" "start" "05cbe8c0f7edb53fb48b40a8c277afb38cb0741ef1397b09098e09e2dd6d0dca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05cbe8c0f7edb53fb48b40a8c277afb38cb0741ef1397b09098e09e2dd6d0dca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "05cbe8c0f7edb53fb48b40a8c277afb38cb0741ef1397b09098e09e2dd6d0dca" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05cbe8c0f7edb53fb48b40a8c277afb38cb0741ef1397b09098e09e2dd6d0dca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "05cbe8c0f7edb53fb48b40a8c277afb38cb0741ef1397b09098e09e2dd6d0dca" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.59
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling futures v0.1.28
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling unicode-normalization v0.1.8
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling owning_ref v0.4.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling pear_codegen v0.1.2
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling openssl-sys v0.9.47
[INFO] [stderr]    Compiling ring v0.13.5
[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_RELEASE_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/release/build/pear_codegen-55141b740a354abc/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: 1.99.0-beta.8 (2026-09-26). Minimum required: 1.31.0-nightly (2018-10-05).
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (848) 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:     0x60cd101e0071 - <<std[70759c8f55707aa4]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[df12db4294e9bfd3]::fmt::Display>::fmt
[INFO] [stderr]      1:     0x60cd101f174a - core[df12db4294e9bfd3]::fmt::write
[INFO] [stderr]      2:     0x60cd101e414c - <std[70759c8f55707aa4]::sys::stdio::unix::Stderr as core[df12db4294e9bfd3]::io::write::Write>::write_fmt
[INFO] [stderr]      3:     0x60cd101c3596 - std[70759c8f55707aa4]::panicking::default_hook::{closure#0}
[INFO] [stderr]      4:     0x60cd101dbed1 - std[70759c8f55707aa4]::panicking::default_hook
[INFO] [stderr]      5:     0x60cd101dc08b - std[70759c8f55707aa4]::panicking::panic_with_hook
[INFO] [stderr]      6:     0x60cd101c2bfc - std[70759c8f55707aa4]::panicking::begin_panic::<&str>::{closure#0}
[INFO] [stderr]      7:     0x60cd101bc4f9 - std[70759c8f55707aa4]::sys::backtrace::__rust_end_short_backtrace::<std[70759c8f55707aa4]::panicking::begin_panic<&str>::{closure#0}, !>
[INFO] [stderr]      8:     0x60cd101b9a3b - std[70759c8f55707aa4]::panicking::begin_panic::<&str>
[INFO] [stderr]      9:     0x60cd101a4089 - build_script_build[e81d64c031d5289e]::main
[INFO] [stderr]     10:     0x60cd101a4bb3 - <fn() as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     11:     0x60cd101a37b6 - std[70759c8f55707aa4]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     12:     0x60cd101a37c9 - std[70759c8f55707aa4]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     13:     0x60cd101db309 - std[70759c8f55707aa4]::rt::lang_start_internal
[INFO] [stderr]     14:     0x60cd101a3751 - std[70759c8f55707aa4]::rt::lang_start::<()>
[INFO] [stderr]     15:     0x60cd101a4c25 - main
[INFO] [stderr]     16:     0x7331f21a5601 - <unknown>
[INFO] [stderr]     17:     0x7331f21a5718 - __libc_start_main
[INFO] [stderr]     18:     0x60cd101a3485 - _start
[INFO] [stderr]     19:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "05cbe8c0f7edb53fb48b40a8c277afb38cb0741ef1397b09098e09e2dd6d0dca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05cbe8c0f7edb53fb48b40a8c277afb38cb0741ef1397b09098e09e2dd6d0dca", kill_on_drop: false }`
[INFO] [stdout] 05cbe8c0f7edb53fb48b40a8c277afb38cb0741ef1397b09098e09e2dd6d0dca
