fixup: prevent roundN to be 0

Author: not-matthias

testing/testing/benchmark.go

@@ -374,7 +374,9 @@ func (b *B) launch() {
 			benchD := time.Second * b.benchTime.d
 			benchN := predictN(benchD.Nanoseconds(), int64(b.N), b.duration.Nanoseconds(), warmupN)
 			rounds := 100 // TODO: Compute the rounds in a better way
-			roundN := benchN / int(rounds)
+			// Ensure roundN is at least 1 to prevent division by zero in BenchmarkResult printing
+			// when very slow benchmarks can't complete even 1 iteration per round
+			roundN := max(benchN/int(rounds), 1)
 
 			for range rounds {
 				b.runN(int(roundN))