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Fix panic when using default-initialized FlagSet

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Closes #13294

Signed-off-by: Sebastien Rannou <mxs@sbrk.org>
This commit is contained in:
s. rannou 2015-05-18 11:33:51 +02:00
parent bca14f8730
commit 08683e7133
1 changed files with 1 additions and 1 deletions
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2
mflag/flag.go
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@ -560,7 +560,7 @@ func defaultUsage(f *FlagSet) {
// Usage prints to standard error a usage message documenting all defined command-line flags.
// The function is a variable that may be changed to point to a custom function.
var Usage = func() {
fmt.Fprintf(CommandLine.output, "Usage of %s:\n", os.Args[0])
fmt.Fprintf(CommandLine.Out(), "Usage of %s:\n", os.Args[0])
PrintDefaults()
}