Merge #9547: bench: Assert that division by zero is unreachable

db07f91 Assert that what might look like a possible division by zero is actually unreachable (practicalswift)

Tree-SHA512: f1652eb37196a5b72f356503a1fbb44fb98aa8a94954ad1765f86d81ebf41a2337d4eb58c4f19937fda3752f5d2d642756e44afdbd438015b87ac20801246bff

Author: laanwj

src/bench/bench.cpp

@@ -92,6 +92,8 @@ bool benchmark::State::KeepRunning()
 
     --count;
 
+    assert(count != 0 && "count == 0 => (now == 0 && beginTime == 0) => return above");
+
     // Output results
     double average = (now-beginTime)/count;
     int64_t averageCycles = (nowCycles-beginCycles)/count;