[INFO] fetching crate microbit-bsp 0.4.0...
[INFO] testing microbit-bsp-0.4.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate microbit-bsp 0.4.0 into /workspace/builds/worker-4-tc2/source
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate microbit-bsp 0.4.0
[INFO] finished tweaking crates.io crate microbit-bsp 0.4.0
[INFO] tweaked toml for crates.io crate microbit-bsp 0.4.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate microbit-bsp 0.4.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate microbit-bsp 0.4.0 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-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2843c0810fc605f9e022d99830a2283b6932449c4b331230ec99ea487873834
[INFO] running `Command { std: "docker" "start" "-a" "a2843c0810fc605f9e022d99830a2283b6932449c4b331230ec99ea487873834", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2843c0810fc605f9e022d99830a2283b6932449c4b331230ec99ea487873834", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2843c0810fc605f9e022d99830a2283b6932449c4b331230ec99ea487873834", kill_on_drop: false }`
[INFO] [stdout] a2843c0810fc605f9e022d99830a2283b6932449c4b331230ec99ea487873834
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 368470c27acd0e670a997ab340aa412d180b2c0813be7c091079b4ef0b8f381c
[INFO] running `Command { std: "docker" "start" "-a" "368470c27acd0e670a997ab340aa412d180b2c0813be7c091079b4ef0b8f381c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]    Compiling defmt v1.0.1
[INFO] [stderr]    Compiling defmt-macros v1.0.1
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling nb v1.1.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling futures-sink v0.3.30
[INFO] [stderr]    Compiling futures-core v0.3.30
[INFO] [stderr]    Compiling critical-section v1.1.2
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]    Compiling pin-project-lite v0.2.14
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-task v0.3.30
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling litrs v0.4.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling embedded-io-async v0.6.1
[INFO] [stderr]    Compiling embedded-hal-async v1.0.0
[INFO] [stderr]    Compiling embassy-time-driver v0.2.0
[INFO] [stderr]    Compiling embedded-hal v1.0.0
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling cortex-m-rt v0.7.4
[INFO] [stderr]    Compiling vcell v0.1.3
[INFO] [stderr]    Compiling embedded-io v0.6.1
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling embassy-sync v0.6.2
[INFO] [stderr]    Compiling volatile-register v0.2.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling unicase v2.7.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling bitfield v0.13.2
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling bitflags v2.5.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling pulldown-cmark v0.11.3
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling embassy-executor v0.7.0
[INFO] [stderr]    Compiling embassy-sync v0.7.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling fixed v1.27.0
[INFO] [stderr]    Compiling nrf-pac v0.1.0
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling portable-atomic v1.10.0
[INFO] [stderr]    Compiling embedded-storage v0.3.1
[INFO] [stderr]    Compiling document-features v0.2.8
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling embassy-time-queue-utils v0.1.0
[INFO] [stderr]    Compiling embassy-hal-internal v0.3.0
[INFO] [stderr]    Compiling embedded-storage-async v0.4.1
[INFO] [stderr]    Compiling half v2.4.1
[INFO] [stderr]    Compiling embassy-futures v0.1.1
[INFO] [stderr]    Compiling bytemuck v1.15.0
[INFO] [stderr]    Compiling futures-channel v0.3.30
[INFO] [stderr]    Compiling futures-io v0.3.30
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling proc-macro-error-attr2 v2.0.0
[INFO] [stderr]    Compiling futures v0.3.30
[INFO] [stderr]    Compiling static_cell v2.1.0
[INFO] [stderr]    Compiling proc-macro-error2 v2.0.1
[INFO] [stderr]    Compiling darling_core v0.20.10
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.7.0
[INFO] [stderr]    Compiling maybe-async-cfg v0.2.4
[INFO] [stderr]    Compiling lsm303agr v1.1.0
[INFO] [stderr]    Compiling defmt-parser v1.0.0
[INFO] [stderr]    Compiling darling_macro v0.20.10
[INFO] [stderr]    Compiling darling v0.20.10
[INFO] [stderr]    Compiling embassy-executor-macros v0.6.2
[INFO] [stderr]    Compiling defmt v0.3.100
[INFO] [stderr]    Compiling embassy-time v0.4.0
[INFO] [stderr]    Compiling embassy-usb-driver v0.1.0
[INFO] [stderr]    Compiling embassy-embedded-hal v0.3.0
[INFO] [stderr]    Compiling embassy-nrf v0.4.1
[INFO] [stderr]    Compiling microbit-bsp v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 32.26s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: document-features v0.2.8
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "368470c27acd0e670a997ab340aa412d180b2c0813be7c091079b4ef0b8f381c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "368470c27acd0e670a997ab340aa412d180b2c0813be7c091079b4ef0b8f381c", kill_on_drop: false }`
[INFO] [stdout] 368470c27acd0e670a997ab340aa412d180b2c0813be7c091079b4ef0b8f381c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13f4f1de810aafc029eb6519a888b1d539cdc1d322ca389d5dbede799cc26353
[INFO] running `Command { std: "docker" "start" "-a" "13f4f1de810aafc029eb6519a888b1d539cdc1d322ca389d5dbede799cc26353", kill_on_drop: false }`
[INFO] [stderr]    Compiling microbit-bsp v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/tmp/rustcXayKSw/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-*,libgetopts-*,librustc_std_workspace_std-*,libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,libcfg_if-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*}.rlib" "/opt/rustwide/target/debug/deps/{libstatic_cell-dad08b806aa689d7,libportable_atomic-fe8455d09f425444,liblsm303agr-0f2daf0cdc8c79aa,libembassy_nrf-65cb915008832a38,librand_core-7e522f941fc58b6a,librand_core-4b67a56f68d6cbfa,libbitflags-46cac965755be86c,libnrf_pac-209b8123096fbfca,libcortex_m_rt-47a39ef8e8ce61bb,libembassy_usb_driver-fc2057788ec6a911,libembassy_embedded_hal-5fc0a4ce3e0fcb52,libembassy_time-9911acd9632ff7f3,libembedded_hal_async-8646c9e690cd2d3c,libembedded_hal-e2c075ad3782faf1,libembassy_sync-8a64fa95861ae26b,libembassy_futures-4b4ce9337a6c203e,libembedded_storage_async-62ecb7d3dc1043d0,libfixed-91db48c7c31b497c,libtypenum-1862a5dd6fcdc44c,libbytemuck-c466d187f4ad8045,libhalf-3341b3046a8038da,libaz-c78b2287c8127d41,libembedded_storage-202da84cdb3ef141,libcfg_if-3e7fc4e38d4a72b5,libembassy_hal_internal-a7dd4282e7c21207,libcortex_m-9bbd84447f938843,libembedded_hal-f37092df6fe13159,libvoid-6336667ff9ef9cc5,libnb-574cd195fbe064b0,libnb-8256a674579b77d4,libvolatile_register-6ecd5712b45a5657,libvcell-0eaad7c905f5a0e7,libbare_metal-4c035d36fb109858,libnum_traits-a6f639c1d4656c76,libembassy_time_queue_utils-2c2a88c6447a3527,libembassy_executor-cf18bb8b2d3a69bb,libembassy_time_driver-aacbc7bd168efbc3,libembassy_sync-5b6832730bfe598b,libembedded_io_async-31338816f33e0fe3,libembedded_io-71ebd5a26a1a8cb5,libfutures_util-44ecda7d87d2c19c,libpin_project_lite-e591be24d8b8b3c6,libfutures_sink-1e8d2315348f179d,libfutures_task-0c2caeb938bf5418,libpin_utils-3860774ad9b215b5,libfutures_core-9431d50d704c12a3,libheapless-9179f766cbda4dee,libdefmt-6d6c85935d120bdf,libdefmt-d15968f0aeedb104,libbitflags-dde12b0d7d495b50,libhash32-00aa6dbbbc96b93a,libbyteorder-9f6ac6743e38a88c,libcritical_section-90954c16f4a2c6fe}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/tmp/rustcXayKSw/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/opt/rustwide/target/debug/build/defmt-a497550027ff8332/out" "-L" "/opt/rustwide/target/debug/build/cortex-m-rt-7fe63b4691333c75/out" "-L" "/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nrf-pac-0.1.0/src/chips/nrf52833" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/microbit_bsp-6c4f4b2e3f7773f2" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: undefined symbol: main
[INFO] [stdout]           >>> referenced by /usr/lib/gcc/x86_64-linux-gnu/13/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `microbit-bsp` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "13f4f1de810aafc029eb6519a888b1d539cdc1d322ca389d5dbede799cc26353", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13f4f1de810aafc029eb6519a888b1d539cdc1d322ca389d5dbede799cc26353", kill_on_drop: false }`
[INFO] [stdout] 13f4f1de810aafc029eb6519a888b1d539cdc1d322ca389d5dbede799cc26353