// Phase 29ab P2: Pattern2 LoopBodyLocal Trim (seg) minimal case
//
// Goal:
// - break condition uses LoopBodyLocal (seg) with Trim A-3 shape
// - JoinIR -> merge path should handle promotion
//
// Expected (before fix): FAIL/out-of-scope
// Expected (after fix): prints "2" and returns 2

static box Main {
    main() {
        local s = "ab "
        local i = 0

        loop(i < s.length()) {
            local seg = s.substring(i, i + 1)

            if seg == " " || seg == "\t" {
                break
            }

            i = i + 1
        }

        print(i)
        return i
    }
}