[INFO] cloning repository https://github.com/hermann-wenninger/empty
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hermann-wenninger/empty" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhermann-wenninger%2Fempty", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhermann-wenninger%2Fempty'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b9deefd988968c85db88a214821bb3c7d6c5dc58
[INFO] testing hermann-wenninger/empty against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhermann-wenninger%2Fempty" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hermann-wenninger/empty
[INFO] finished tweaking git repo https://github.com/hermann-wenninger/empty
[INFO] tweaked toml for git repo https://github.com/hermann-wenninger/empty written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hermann-wenninger/empty on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hermann-wenninger/empty 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-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb7a3b100ff61af510995a15fbce86e6a0a51b1f454a82dc2007aa30406650fb
[INFO] running `Command { std: "docker" "start" "-a" "fb7a3b100ff61af510995a15fbce86e6a0a51b1f454a82dc2007aa30406650fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb7a3b100ff61af510995a15fbce86e6a0a51b1f454a82dc2007aa30406650fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb7a3b100ff61af510995a15fbce86e6a0a51b1f454a82dc2007aa30406650fb", kill_on_drop: false }`
[INFO] [stdout] fb7a3b100ff61af510995a15fbce86e6a0a51b1f454a82dc2007aa30406650fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0719c18e5f16283c50dd08141016bc1a25b4a4b4e976cf439fdde6db2e172ce1
[INFO] running `Command { std: "docker" "start" "-a" "0719c18e5f16283c50dd08141016bc1a25b4a4b4e976cf439fdde6db2e172ce1", 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 bytes v1.9.0
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling log v0.4.24
[INFO] [stderr]    Compiling itoa v1.0.14
[INFO] [stderr]    Compiling once_cell v1.20.2
[INFO] [stderr]    Compiling cpufeatures v0.2.16
[INFO] [stderr]    Compiling pkg-config v0.3.31
[INFO] [stderr]    Compiling httparse v1.9.5
[INFO] [stderr]    Compiling serde v1.0.217
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling rustversion v1.0.19
[INFO] [stderr]    Compiling tinyvec v1.8.1
[INFO] [stderr]    Compiling unicode-bidi v0.3.18
[INFO] [stderr]    Compiling unicode-properties v0.1.3
[INFO] [stderr]    Compiling tower-layer v0.3.3
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling litemap v0.7.4
[INFO] [stderr]    Compiling foldhash v0.1.4
[INFO] [stderr]    Compiling serde_json v1.0.135
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling tracing-core v0.1.33
[INFO] [stderr]    Compiling siphasher v1.0.1
[INFO] [stderr]    Compiling sha2 v0.10.8
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling md-5 v0.10.6
[INFO] [stderr]    Compiling hashbrown v0.15.2
[INFO] [stderr]    Compiling http v0.2.12
[INFO] [stderr]    Compiling http v1.2.0
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling icu_locid_transform_data v1.5.0
[INFO] [stderr]    Compiling icu_properties_data v1.5.0
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]    Compiling whoami v1.5.2
[INFO] [stderr]    Compiling phf v0.11.3
[INFO] [stderr]    Compiling bitflags v2.7.0
[INFO] [stderr]    Compiling local-waker v0.1.4
[INFO] [stderr]    Compiling icu_normalizer_data v1.5.0
[INFO] [stderr]    Compiling zstd-safe v7.2.1
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.24
[INFO] [stderr]    Compiling regex-lite v0.1.6
[INFO] [stderr]    Compiling powerfmt v0.2.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling signal-hook-registry v1.4.2
[INFO] [stderr]    Compiling socket2 v0.5.8
[INFO] [stderr]    Compiling mio v1.0.3
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling jobserver v0.1.32
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling matchit v0.7.3
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]    Compiling stringprep v0.1.5
[INFO] [stderr]    Compiling windows_x86_64_gnu v0.48.5
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]    Compiling cc v1.2.10
[INFO] [stderr]    Compiling http-body v0.4.6
[INFO] [stderr]    Compiling miniz_oxide v0.8.2
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling time-macros v0.2.19
[INFO] [stderr]    Compiling indexmap v2.7.1
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling deranged v0.3.11
[INFO] [stderr]    Compiling axum-core v0.3.4
[INFO] [stderr]    Compiling actix-service v2.0.2
[INFO] [stderr]    Compiling bytestring v1.4.0
[INFO] [stderr]    Compiling actix-utils v3.0.1
[INFO] [stderr]    Compiling multer v3.1.0
[INFO] [stderr]    Compiling cookie v0.16.2
[INFO] [stderr]    Compiling anyhow v1.0.95
[INFO] [stderr]    Compiling prettyplease v0.2.27
[INFO] [stderr]    Compiling flate2 v1.0.35
[INFO] [stderr]    Compiling brotli v6.0.0
[INFO] [stderr]    Compiling axum v0.6.20
[INFO] [stderr]    Compiling is-terminal v0.4.13
[INFO] [stderr]    Compiling local-channel v0.1.5
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling db v0.1.0 (/opt/rustwide/workdir/crates/db)
[INFO] [stderr]    Compiling language-tags v0.3.2
[INFO] [stderr]    Compiling env_logger v0.10.2
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling windows-targets v0.48.5
[INFO] [stderr]    Compiling hashlink v0.10.0
[INFO] [stderr]    Compiling fallible-streaming-iterator v0.1.9
[INFO] [stderr]    Compiling fallible-iterator v0.3.0
[INFO] [stderr] error: failed to run custom build command for `db v0.1.0 (/opt/rustwide/workdir/crates/db)`
[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/db-4afff94a9d750805/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (1267) panicked at crates/db/build.rs:13:47:
[INFO] [stderr]   XXXXXXXXXXXXXXXXXX
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x627ec57becba - std[128c3efe2914e152]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x627ec57becba - std[128c3efe2914e152]::backtrace_rs::backtrace::trace_unsynchronized::<std[128c3efe2914e152]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x627ec57becba - std[128c3efe2914e152]::sys::backtrace::_print_fmt
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:74:9
[INFO] [stderr]      3:     0x627ec57becba - <<std[128c3efe2914e152]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[6771d259883166e6]::fmt::Display>::fmt
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:44:26
[INFO] [stderr]      4:     0x627ec57cfb2a - <core[6771d259883166e6]::fmt::rt::Argument>::fmt
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x627ec57cfb2a - core[6771d259883166e6]::fmt::write
[INFO] [stderr]      6:     0x627ec57c2d42 - std[128c3efe2914e152]::io::default_write_fmt::<std[128c3efe2914e152]::sys::stdio::unix::Stderr>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/io/mod.rs:621:11
[INFO] [stderr]      7:     0x627ec57c2d42 - <std[128c3efe2914e152]::sys::stdio::unix::Stderr as std[128c3efe2914e152]::io::Write>::write_fmt
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/io/mod.rs:1976:13
[INFO] [stderr]      8:     0x627ec57a470f - <std[128c3efe2914e152]::sys::backtrace::BacktraceLock>::print
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:47:9
[INFO] [stderr]      9:     0x627ec57a470f - std[128c3efe2914e152]::panicking::default_hook::{closure#0}
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:292:27
[INFO] [stderr]     10:     0x627ec57ba921 - std[128c3efe2914e152]::panicking::default_hook
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:319:9
[INFO] [stderr]     11:     0x627ec57baadb - std[128c3efe2914e152]::panicking::panic_with_hook
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:825:13
[INFO] [stderr]     12:     0x627ec57a47c8 - std[128c3efe2914e152]::panicking::panic_handler::{closure#0}
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:698:13
[INFO] [stderr]     13:     0x627ec5799b39 - std[128c3efe2914e152]::sys::backtrace::__rust_end_short_backtrace::<std[128c3efe2914e152]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:182:18
[INFO] [stderr]     14:     0x627ec57a502d - __rustc[752cc74e29381ccc]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:689:5
[INFO] [stderr]     15:     0x627ec57d021c - core[6771d259883166e6]::panicking::panic_fmt
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x627ec57cff74 - core[6771d259883166e6]::panicking::panic_display::<&str>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/panicking.rs:259:5
[INFO] [stderr]     17:     0x627ec57cff74 - core[6771d259883166e6]::option::expect_failed
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/option.rs:2260:5
[INFO] [stderr]     18:     0x627ec578bf81 - core::option::Option<T>::expect::hc7174b2ec63dfe7a
[INFO] [stderr]     19:     0x627ec5789ab3 - build_script_build::cornucopia::h6e49e403a5e3ce14
[INFO] [stderr]     20:     0x627ec578a0a6 - build_script_build::main::h8a79d984e2030e6b
[INFO] [stderr]     21:     0x627ec578b0d3 - core::ops::function::FnOnce::call_once::h7f8cbfa635543382
[INFO] [stderr]     22:     0x627ec578ab36 - std::sys::backtrace::__rust_begin_short_backtrace::hd3cc191009dac854
[INFO] [stderr]     23:     0x627ec578aa29 - std::rt::lang_start::{{closure}}::h963a7ae22e1f0b87
[INFO] [stderr]     24:     0x627ec57b9bc4 - <&dyn core[6771d259883166e6]::ops::function::Fn<(), Output = i32> + core[6771d259883166e6]::marker::Sync + core[6771d259883166e6]::panic::unwind_safe::RefUnwindSafe as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     25:     0x627ec57b9bc4 - std[128c3efe2914e152]::panicking::catch_unwind::do_call::<&dyn core[6771d259883166e6]::ops::function::Fn<(), Output = i32> + core[6771d259883166e6]::marker::Sync + core[6771d259883166e6]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:581:40
[INFO] [stderr]     26:     0x627ec57b9bc4 - std[128c3efe2914e152]::panicking::catch_unwind::<i32, &dyn core[6771d259883166e6]::ops::function::Fn<(), Output = i32> + core[6771d259883166e6]::marker::Sync + core[6771d259883166e6]::panic::unwind_safe::RefUnwindSafe>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:544:19
[INFO] [stderr]     27:     0x627ec57b9bc4 - std[128c3efe2914e152]::panic::catch_unwind::<&dyn core[6771d259883166e6]::ops::function::Fn<(), Output = i32> + core[6771d259883166e6]::marker::Sync + core[6771d259883166e6]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panic.rs:359:14
[INFO] [stderr]     28:     0x627ec57b9bc4 - std[128c3efe2914e152]::rt::lang_start_internal::{closure#0}
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/rt.rs:175:24
[INFO] [stderr]     29:     0x627ec57b9bc4 - std[128c3efe2914e152]::panicking::catch_unwind::do_call::<std[128c3efe2914e152]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:581:40
[INFO] [stderr]     30:     0x627ec57b9bc4 - std[128c3efe2914e152]::panicking::catch_unwind::<isize, std[128c3efe2914e152]::rt::lang_start_internal::{closure#0}>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:544:19
[INFO] [stderr]     31:     0x627ec57b9bc4 - std[128c3efe2914e152]::panic::catch_unwind::<std[128c3efe2914e152]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panic.rs:359:14
[INFO] [stderr]     32:     0x627ec57b9bc4 - std[128c3efe2914e152]::rt::lang_start_internal
[INFO] [stderr]                                  at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/rt.rs:171:5
[INFO] [stderr]     33:     0x627ec578aa11 - std::rt::lang_start::hce90f52e8c85acc3
[INFO] [stderr]     34:     0x627ec578dc15 - main
[INFO] [stderr]     35:     0x7c483d8111ca - <unknown>
[INFO] [stderr]     36:     0x7c483d81128b - __libc_start_main
[INFO] [stderr]     37:     0x627ec57898f5 - _start
[INFO] [stderr]     38:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0719c18e5f16283c50dd08141016bc1a25b4a4b4e976cf439fdde6db2e172ce1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0719c18e5f16283c50dd08141016bc1a25b4a4b4e976cf439fdde6db2e172ce1", kill_on_drop: false }`
[INFO] [stdout] 0719c18e5f16283c50dd08141016bc1a25b4a4b4e976cf439fdde6db2e172ce1
