But since I have forced that position at -1

Which only works because input wasn't chomped, right? I wonder if someone misreads it as "which makes \G match nowhere". While, assigning negative values to pos counts leftward from the end (similar to parameter of substr, or negative array subscript, etc.). Surprise or not, this pos behavior isn't documented (nor silent clumping if value is out of bounds).

In reply to Re^2: /g option not making s// find all matches by vr
in thread /g option not making s// find all matches by raygun

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