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fix escapeFilename panic on empty input - #6
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src.len - 1 underflows usize and triggers a runtime integer overflow panic when escapeFilename is called with an empty string. This is reachable from C via debuginfod_find_source / debuginfod_find_section when GDB passes a zero-length C string for source_path or section. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Diagnosed and fixed with Claude Code