TiFlash unexpectedly crashes

Bug Report

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1. Minimal reproduce step (Required)

I don't known how it happens, tiflash runs as usual, but it suddenly crashed. logs as below:

the only fatal log copied as this:

[2025/04/26 21:46:46.086 +08:00] [FATAL] [lib.rs:510] ["called `Option::unwrap()` on a `None` value"] [backtrace="   0: tikv_util::set_panic_hook::{{closure}}\n   1: <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/alloc/src/boxed.rs:2032:9\n      std::panicking::rust_panic_with_hook\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/std/src/panicking.rs:692:13\n   2: std::panicking::begin_panic_handler::{{closure}}\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/std/src/panicking.rs:577:13\n   3: std::sys_common::backtrace::__rust_end_short_backtrace\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/std/src/sys_common/backtrace.rs:137:18\n   4: rust_begin_unwind\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/std/src/panicking.rs:575:5\n   5: core::panicking::panic_fmt\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/core/src/panicking.rs:65:14\n   6: core::panicking::panic\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/core/src/panicking.rs:114:5\n   7: <raftstore::coprocessor::region_info_accessor::RegionCollector as tikv_util::worker::pool::Runnable>::run\n   8: yatp::task::future::RawTask<F>::poll\n   9: <yatp::task::future::Runner as yatp::pool::runner::Runner>::handle\n  10: std::sys_common::backtrace::__rust_begin_short_backtrace\n  11: core::ops::function::FnOnce::call_once{{vtable.shim}}\n  12: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/alloc/src/boxed.rs:2000:9\n      <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/alloc/src/boxed.rs:2000:9\n      std::sys::unix::thread::Thread::new::thread_start\n             at rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/std/src/sys/unix/thread.rs:108:17\n  13: start_thread\n  14: __GI___clone3\n"] [location=/rustc/96ddd32c4bfb1d78f0cd03eb068b1710a8cebeef/library/alloc/src/collections/btree/navigate.rs:73] [thread_name=region-collector-worker-0]

it seems that be related with tikv, but i don't find error about tiflash in tikv logs.

2. What did you expect to see? (Required)

tiflash runs normally.

3. What did you see instead (Required)

tiflash crashes unexpectedly.

4. What is your TiFlash version? (Required)

v7.5.2 deployed in k8s by tidb operator v1.5.3.

Start with the captured RegionCollector worker stack trace, especially the RegionCollector::run frame, lib.rs:510, and the BTree navigation location. Correlate those locations with the TiFlash v7.5.2 and TiKV logs from the Kubernetes deployment. Done means reproducing or isolating the unexpected crash and adding evidence that identifies its cause.