jashkenas/coffee-script — comment on commit 3fb064f274875b84cc7636f33cb7ee24868f3c31
File: src/lexer.coffee line 159
By michaelficarra:

Yes, I know what the issues were. `/\\[0-7]/` does not fix that because it doesn't allow `"\\0"`. Try this: `/^(?:\\\\|[^\\])*\\[0-7]/`