pprofSamples := pprofStacks[stack]
			delete(pprofStacks, stack)
			if traceSamples < pprofSamples {
				t.Logf("execution trace did not include all CPU profile samples for stack %q; %d in profile, %d in trace",
					stack, pprofSamples, traceSamples)
				if !overflowed {
					t.Fail()
				}
			}
		}
		for stack, pprofSamples := range pprofStacks {