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update StringBuilder.toString to have an empty parameter list #24452

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update StringBuilder.toString to have an empty parameter list #24452

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2 changes: 1 addition & 1 deletion library/src/scala/collection/mutable/StringBuilder.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -109,7 +109,7 @@ final class StringBuilder(val underlying: java.lang.StringBuilder) extends Abstr

def result() = underlying.toString

override def toString: String = result()
override def toString(): String = result()

override def toArray[B >: Char](implicit ct: scala.reflect.ClassTag[B]) =
ct.runtimeClass match {
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6 changes: 6 additions & 0 deletions tests/pos/i19616.scala
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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
def test: Unit =
val sb = new StringBuilder
var key = ""
var map = Map.empty[String, String]
map += key -> sb.toString()
map += key -> sb.toString
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