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testing: Logf not reported outside of inner benchmark run #29211

griesemer opened this Issue Dec 13, 2018 · 0 comments


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commented Dec 13, 2018

Applying the following patch illustrates the problem:

diff --git a/src/go/format/benchmark_test.go b/src/go/format/benchmark_test.go
index 7bd45c0e95..62131e0977 100644
--- a/src/go/format/benchmark_test.go
+++ b/src/go/format/benchmark_test.go
@@ -58,6 +58,7 @@ var tests = []struct {
 func BenchmarkFormat(b *testing.B) {
+       b.Logf("foo") // <<< not reported
        var src bytes.Buffer
        for _, t := range tests {
@@ -74,6 +75,7 @@ func BenchmarkFormat(b *testing.B) {
                b.Run(fmt.Sprintf("%s-%d",, t.n), func(b *testing.B) {
+                       b.Logf("foo") // <<< reported

When running this benchmark, the outer b.Logf call doesn't get reported in the output.

I expected to see both.

@griesemer griesemer added this to the Go1.13 milestone Dec 13, 2018

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