Documentation code does not work properly

[huifer]

Abnormal document: https://embassy.dev/book/#_interrupt_driven
Code Source: https://github.com/embassy-rs/embassy/blob/main/docs/examples/layer-by-layer/blinky-irq/src/main.rs

The following issues occurred during direct compilation:

error: linking with `rust-lld` failed: exit status: 1
  |
  = note: LC_ALL="C" PATH="/home/gongsi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin:/home/gongsi/.cargo/bin:/home/gongsi/.nvm/versions/node/v22.13.0/bin:/home/gongsi/.cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin:/home/gongsi/dev_env/go/bin:/home/gongsi/Downloads/gcc-arm-none-eabi-10.3-2021.10-aarch64-linux/gcc-arm-none-eabi-10.3-2021.10//bin:/home/gongsi/Downloads/gcc-arm-none-eabi-10.3-2021.10-aarch64-linux/gcc-arm-none-eabi-10.3-2021.10/arm-none-eabi/bin:/home/gongsi/dev_env/go/bin:/home/gongsi/Downloads/gcc-arm-none-eabi-10.3-2021.10-aarch64-linux/gcc-arm-none-eabi-10.3-2021.10//bin:/home/gongsi/Downloads/gcc-arm-none-eabi-10.3-2021.10-aarch64-linux/gcc-arm-none-eabi-10.3-2021.10/arm-none-eabi/bin" VSLANG="1033" "rust-lld" "-flavor" "gnu" "/tmp/rustcuAHFkf/symbols.o" "<30 object files omitted>" "--as-needed" "-Bstatic" "/home/gongsi/learn/my_project/target/thumbv7em-none-eabihf/debug/deps/{libpanic_probe-a2f1f92354c2a9e9.rlib,libdefmt_rtt-49eccd94f33da805.rlib,libembassy_stm32-6c35bcc643c86ab8.rlib,libembedded_hal_nb-37b8f531488990d6.rlib,libblock_device_driver-93dde0ab67fc2085.rlib,libaligned-77f8547a819c012f.rlib,libas_slice-9e69285a79dceee6.rlib,libsdio_host-5ae013fd1c152f18.rlib,libchrono-2a5be526c5b7d85c.rlib,librand_core-3994a3186f26df37.rlib,libembassy_embedded_hal-227c968dbb372f63.rlib,libembassy_time-6bee94579b62764b.rlib,libembedded_hal_async-ff33f3eca9dc28f5.rlib,libembedded_hal-b3687eb2d3836138.rlib,libembassy_futures-828a7d0f19579cf6.rlib,libembedded_storage_async-2e25333ab1d521c1.rlib,libembedded_storage-6c3fe3431d675aad.rlib,libbit_field-d1cef261e83005a0.rlib,libembedded_can-ad918403ffdffbd8.rlib,libcfg_if-22106275e95aa662.rlib,libembassy_time_queue_utils-d0a1c6683efbb4a2.rlib,libembassy_executor-f566033a10167558.rlib,libembassy_time_driver-64715014718d75e4.rlib,libstm32_metapac-847252737c478541.rlib,libembassy_sync-aacefcea3345b907.rlib,libfutures_util-ba6a64c003f1096b.rlib,libpin_project_lite-8b68caebfd6a7e06.rlib,libfutures_task-cb206238298008c4.rlib,libpin_utils-7a9a15f9a0b1ced1.rlib,libfutures_core-0a53b6542fabfc90.rlib,libfutures_sink-6fec620b86fab509.rlib,libembedded_io_async-da5aa430c5a5d3c3.rlib,libembedded_io-b7c6f29d7bda1f5e.rlib,libheapless-b0b68b71aa680aa1.rlib,libstable_deref_trait-0fe99e382ef56a8d.rlib,libhash32-2e8e42e58a9ccb3b.rlib,libbyteorder-2c4ca29d877edfa0.rlib,libembassy_hal_internal-d96f6a7c29246d1c.rlib,libdefmt-b314c75b6f22ab03.rlib,libbitflags-b5f138e78066633d.rlib,libnum_traits-ff95a3d47ea5836f.rlib,libcortex_m_rt-f53a036252f5641b.rlib,libcortex_m-023d6b912d7ac4a1.rlib,libembedded_hal-d1d7369946f19e1e.rlib,libvoid-5b77109c2968bdf2.rlib,libnb-6ca7cba225cd8332.rlib,libnb-f4090822aa935a71.rlib,libcritical_section-9cc7d3ecb839b22e.rlib,libvolatile_register-52a3cfcea152e037.rlib,libvcell-85233c4ae9cac450.rlib,libbare_metal-f8348608805d6fec.rlib,librustc_std_workspace_core-cf588f419860230e.rlib,libcore-df478bbba6d14b50.rlib,libcompiler_builtins-3d11ef4151d259a2.rlib}" "-Bdynamic" "--eh-frame-hdr" "-z" "noexecstack" "-L" "/home/gongsi/learn/my_project/target/thumbv7em-none-eabihf/debug/build/app-f9f4f86b320795a6/out" "-L" "/home/gongsi/learn/my_project/target/thumbv7em-none-eabihf/debug/build/cortex-m-dd9db2ca96d338a0/out" "-L" "/home/gongsi/learn/my_project/target/thumbv7em-none-eabihf/debug/build/cortex-m-rt-e43a3807e67a4609/out" "-L" "/home/gongsi/learn/my_project/target/thumbv7em-none-eabihf/debug/build/defmt-86f33fc2f3a67644/out" "-L" "/home/gongsi/learn/my_project/target/thumbv7em-none-eabihf/debug/build/embassy-stm32-a4719cc763bf561c/out" "-L" "/home/gongsi/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/stm32-metapac-16.0.0/src/chips/stm32l431rc" "-o" "/home/gongsi/learn/my_project/target/thumbv7em-none-eabihf/debug/deps/app-00576b9082130cc1" "--gc-sections" "--nmagic" "-Tlink.x" "-Tdefmt.x"
  = note: some arguments are omitted. use `--verbose` to show all linker arguments
  = note: rust-lld: error: duplicate symbol: EXTI15_10
          >>> defined at main.rs:36 (src/main.rs:36)
          >>>            /home/gongsi/learn/my_project/target/thumbv7em-none-eabihf/debug/deps/app-00576b9082130cc1.7sb6go550mb7bgws9dm7akpuj.rcgu.o:(EXTI15_10)
          >>> defined at exti.rs:328 (src/exti.rs:328)
          >>>            embassy_stm32-6c35bcc643c86ab8.embassy_stm32.59e8df6758ead74c-cgu.06.rcgu.o:(.text.EXTI15_10+0x1) in archive /home/gongsi/learn/my_project/target/thumbv7em-none-eabihf/debug/deps/libembassy_stm32-6c35bcc643c86ab8.rlib
          

I don't understand why an empty project would have such a problem

# This file was automatically generated.

[package]
edition = "2021"
name = "app"
version = "0.1.0"

[dependencies]
embassy-stm32 = { version = "0.2.0", features =  ["defmt",
    "stm32l431rc", "time-driver-any", "memory-x", "unstable-pac", "exti", "chrono","low-power"]  }
embassy-executor = { version = "0.7.0", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt"] }
embassy-time = { version = "0.4.0", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
ufmt = "0.1"
embassy-futures = {version = "0.1.1",features = ["defmt"]}
defmt = "0.3.5"
defmt-rtt = "0.4.0"
cortex-m = {version = "0.7.7", features = ["critical-section-single-core"]}
cortex-m-rt = "0.7.3"
panic-probe = "0.3.1"

embedded-io-async = "0.6.1"
embedded-io = "0.6.1"
embedded-alloc = {version = "=0.6.0", features = ["llff"]}
heapless="0.8.0"
nb = "1.0.0"
static_cell = "2"
stm32-metapac = {version = "16.0.0",features = ["pac","stm32l431rc"]}
embassy-sync = "0.6.2"
[[bin]]
name = "app"
test = false
bench = false

[profile.dev]


[profile.release]
debug = true
[features]
default = ["defmt-default"]
defmt-default = []
defmt-trace = []
defmt-debug = []
defmt-info = []
defmt-warn = []
defmt-error = []