Incorrect Line Numbers When Parsing `.debug_line` with `gimli`

[hapeeeeee]

I attempted to use the gimli library to parse the .debug_line section of a WebAssembly (Wasm) file that includes debug information. The Wasm file was written in Motoko and compiled using moc. However, gimli produced incorrect line numbers during parsing.

My implementation is nearly identical to the example provided in the gimli library, yet it still fails to retrieve the correct line numbers. To further investigate, I tested my implementation on Wasm files compiled with cargo, and the results were entirely correct.

[ggreif]

If this is an off-by-one error then it should be easy to fix. The section gets built in src/wasm-exts/customModuleEncode.ml.
If the info is bad in a big way, then we need to investigate

[hapeeeeee]

I retested the DWARF information and found that moc currently produces incorrect line numbers in some cases, such as https://github.com/dfinity/icp-hello-world-motoko/blob/main/src/backend/main.mo.

However, for this type of file(https://github.com/dfinity/motoko/blob/825d2a42299f44b69ef4c38f63b84ffec6f37ade/test/run/quicksort.mo), it is able to display the correct line numbers.