For the flag "log_backtrace_at" the flag expects "" for an empty value when
calling Set(), but .String() will return ":0" when the value is empty. This
results in a different "emtpy" value being generated by String() than is
accepted by Set().
The following code will reproduce the issue.
*Output from process:*
Value: ":0"
Setting flag returned error: syntax error: expect file.go:234
*Code Snippet:*
package main
import (
"flag"
"fmt"
"github.com/golang/glog"
)
func main() {
flag.Parse()
lba := flag.Lookup("log_backtrace_at")
if lba == nil {
glog.Fatalf("Needs to depend on glog")
}
fmt.Printf("Value: \"%s\"\n", lba.Value.String())
err := lba.Value.Set(lba.Value.String())
if err != nil {
fmt.Printf("Setting flag returned error: %s\n", err)
}
}
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