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errors: examples need improvement #31716

FiloSottile opened this issue Apr 27, 2019 · 3 comments


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commented Apr 27, 2019

There is a total of 4 examples in the package. Two are for New, one doesn't use the package at all, and one incorrectly uses As by dropping the error on the floor if it's not a os.PathError.

	_, err := os.Open("non-existing")
	if err != nil {
		var pathError *os.PathError
		if errors.As(err, &pathError) {
			fmt.Println("Failed at path:", pathError.Path)

@FiloSottile FiloSottile added this to the Go1.13 milestone Apr 27, 2019


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commented Apr 30, 2019

@FiloSottile Can I take a look at this issue?


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commented May 4, 2019

Change mentions this issue: errors: Add errors.Is examples


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commented May 31, 2019

Change mentions this issue: errors: fix package example

gopherbot pushed a commit that referenced this issue Jun 3, 2019
errors: fix package example
The example in example_test.go requires that the whole file be
displayed; the addition of ExampleAs meant that only the body of the
package example function was shown, rather than the surrounding context.

This change moves ExampleAs to the file wrap_test.go file, restoring the
package example to its former glory.

Update #31716

Change-Id: Id0ea77bc06023b239a63c1d6a7c8b3c1dae91ce9
Reviewed-by: Marcel van Lohuizen <>
Reviewed-by: Jean de Klerk <>
Run-TryBot: Benny Siegert <>
TryBot-Result: Gobot Gobot <>

@andybons andybons modified the milestones: Go1.13, Go1.14 Jul 8, 2019

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