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reflect: make allocation test less fragile.
When GOMAXPROCS>1, the testing framework runs in parallel with the test itself and may do a small number of allocations, so allow the "noAllocs" condition to admit just a few. Fixes #1782. R=rsc CC=golang-dev, rsc https://golang.org/cl/4533041
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@ -1451,7 +1451,9 @@ func noAlloc(t *testing.T, n int, f func(int)) {
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for j := 0; j < n; j++ {
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f(j)
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}
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if runtime.MemStats.Mallocs != 0 {
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// A few allocs may happen in the testing package when GOMAXPROCS > 1, so don't
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// require zero mallocs.
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if runtime.MemStats.Mallocs > 5 {
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t.Fatalf("%d mallocs after %d iterations", runtime.MemStats.Mallocs, n)
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}
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}
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