fix(codegen): source map builder panicked because it attempted to subtract with overflow in search_original_line_and_column

[Dunqing]

See: https://github.com/oxc-project/monitor-oxc/actions/runs/12531534720/job/34949348092
Related: #7926

This line causes panic.

oxc/crates/oxc_codegen/src/sourcemap_builder.rs

Lines 147 to 148 in 46fc1a8

	let line = &self.line_offset_tables.lines[original_line];
	let mut original_column = position - line.byte_offset_to_start_of_line;

After investigation, I found that the root cause was the code removed in this PR. I don’t understand what the code was used for, but it was obviously wrong. Because idx is always smaller than cap

[Dunqing]

• fix(codegen): source map builder panicked because it attempted to subtract with overflow in search_original_line_and_column #8185 👈 (View in Graphite)
• main

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[codspeed-hq]

CodSpeed Performance Report

Merging #8185 will not alter performance

_{Comparing 12-29-fix_sourcemap_panic_when_search_original_line_backwards (08b84a2) with main (cfb51f2)}

Summary

✅ 29 untouched benchmarks

[shulaoda]

I also encountered this issue while running the rolldown ci benchmark.

> bench@ bench-ci D:\shulaoda\rolldown\packages\bench
> node ./benches/ci.js

thread 'tokio-runtime-worker' panicked at C:\Users\dalaoshu\.cargo\registry\src\index.crates.io-6f17d22bba15001f\oxc_codegen-0.44.0\src\sourcemap_builder.rs:153:35:
attempt to subtract with overflow
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace