Test cases for a few accidentally-fixed bugs.

- scala/bug#5638 was fixed by something farther back than I can build.
- scala/bug#8348 was fixed by scala#5251.
- scala/bug#9291 was fixed by scala#6092.

Author: hrhino

test/files/pos/t5638/Among.java

@@ -0,0 +1,5 @@
+public class Among {
+
+/** class body */
+
+};

test/files/pos/t5638/Usage.scala

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+object Usage {
+  def among: Among = new Among
+}

test/files/pos/t9291.scala

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+// more than one field is required to trigger crash
+// there must be a default value for one of the parameters
+case class OuterObject(field: Int = 1, anotherField: Int = 2)
+
+object Test {
+  OuterObject().copy(field = OuterObject().field)
+
+  // declaring something without explicit type, with the same name as OuterObject.field
+  def field = "anything"
+}

test/files/run/t8348.check

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+1
+1

test/files/run/t8348/TableColumn.java

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+package j;
+
+public @interface TableColumn {
+    int width() default -1;
+}

test/files/run/t8348/TableColumnImpl.java

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+package j;
+
+import java.lang.annotation.*;
+
+public class TableColumnImpl implements TableColumn {
+    private final int width;
+
+    public TableColumnImpl(int width) { this.width = width; }
+
+    @Override public int width() { return this.width; }
+
+    @Override public Class<? extends Annotation> annotationType() {
+        return TableColumn.class;
+    }
+}

test/files/run/t8348/Test.scala

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+object Test extends App {
+  import j._
+
+  val column = new TableColumnImpl(1)
+
+  println(column.width)
+  println((column: TableColumn).width)
+
+}