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我收到代码错误“RuntimeError: unreachable in rustwasm”

错误信息：

Uncaught (in promise) RuntimeError: unreachable
    at __rust_start_panic (http://127.0.0.1:8080/wasm_bg.wasm:wasm-function[346]:0x274ec)
    at rust_panic (http://127.0.0.1:8080/wasm_bg.wasm:wasm-function[254]:0x26d0b)
    at std::panicking::rust_panic_with_hook::hb07b303a83b6d242 (http://127.0.0.1:8080/wasm_bg.wasm:wasm-function[168]:0x24a47)
    at rust_begin_unwind (http://127.0.0.1:8080/wasm_bg.wasm:wasm-function[228]:0x267ed)
    at core::panicking::panic_fmt::h62f7e605cdf65d83 
    at core::panicking::panic_bounds_check::ha440f41d0e4eca5f 
    at virtualdom::parseNode::h9ba47b7b20126d66 
    at run ()
    at init ()

https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=ac403a9043e49b7a2fc3814a692b8d49

我有以下问题？

1. 它来自parseNode函数吗？
2. 是因为dm.children[i]溢出了吗？或者在 wasm 后台运行时删除了一些函数？
3. 我试图钩住panic::set_hook(Box::new(console_error_panic_hook::hook));但没有多大帮助！我应该如何调试此类错误？