From: Dmitriy Vyukov <dvyukov@google.com>
Date: Mon, 24 Feb 2014 16:32:28 +0000 (+0400)
Subject: testing: diagnose a potential misuse of RunParallel
X-Git-Tag: go1.3beta1~609
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=1163127def254969c92c20ce0e535690f3b1de4c;p=gostls13.git

testing: diagnose a potential misuse of RunParallel

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/68030043
---

diff --git a/src/pkg/testing/benchmark.go b/src/pkg/testing/benchmark.go
index e6f3c6d790..06b5b603e3 100644
--- a/src/pkg/testing/benchmark.go
+++ b/src/pkg/testing/benchmark.go
@@ -417,6 +417,9 @@ func (b *B) RunParallel(body func(*PB)) {
 		}()
 	}
 	wg.Wait()
+	if n == 0 {
+		b.Fatal("RunParallel body did not not call PB.Next")
+	}
 }
 
 // SetParallelism sets the number of goroutines used by RunParallel to p*GOMAXPROCS.