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common: Fix elements are doubling when append a not assignable type
Fixes #6188
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2 changed files with 3 additions and 0 deletions
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@ -65,6 +65,7 @@ func Append(to interface{}, from ...interface{}) (interface{}, error) {
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fv := reflect.ValueOf(f)
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if !fv.Type().AssignableTo(tot) {
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// Fall back to a []interface{} slice.
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tov, _ := indirect(reflect.ValueOf(to))
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return appendToInterfaceSlice(tov, from...)
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}
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tov = reflect.Append(tov, fv)
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@ -14,6 +14,7 @@
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package collections
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import (
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"html/template"
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"testing"
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qt "github.com/frankban/quicktest"
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@ -31,6 +32,7 @@ func TestAppend(t *testing.T) {
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{[]string{"a", "b"}, []interface{}{"c"}, []string{"a", "b", "c"}},
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{[]string{"a", "b"}, []interface{}{"c", "d", "e"}, []string{"a", "b", "c", "d", "e"}},
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{[]string{"a", "b"}, []interface{}{[]string{"c", "d", "e"}}, []string{"a", "b", "c", "d", "e"}},
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{[]string{"a"}, []interface{}{"b", template.HTML("c")}, []interface{}{"a", "b", template.HTML("c")}},
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{nil, []interface{}{"a", "b"}, []string{"a", "b"}},
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{nil, []interface{}{nil}, []interface{}{nil}},
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{[]interface{}{}, []interface{}{[]string{"c", "d", "e"}}, []string{"c", "d", "e"}},
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