20 lines
457 B
Plaintext
20 lines
457 B
Plaintext
// Phase 29ab P7: Pattern6 reverse scan first-fail (step contract violation)
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// Expect: JoinIR freeze (reverse step must be i = i - 1)
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static box Main {
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last_index_bad_step(s, ch) {
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local i = s.length() - 1
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loop(i >= 0) {
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if s.substring(i, i + 1) == ch {
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return i
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}
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i = i + 1
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}
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return -1
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}
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main() {
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return Main.last_index_bad_step("abc", "b")
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}
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}
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