Duplicate bytecode in line number table

[adpi2]

Compiler version

3.1.2

Minimized code

package example

class A {
  def bar: Unit = {
    println("bar")
  }
}

Output

  public void bar();
    Code:
       0: getstatic     #18                 // Field scala/Predef$.MODULE$:Lscala/Predef$;
       3: ldc           #19                 // String bar
       5: invokevirtual #23                 // Method scala/Predef$.println:(Ljava/lang/Object;)V
       8: return
    LineNumberTable:
      line 4: 0
      line 5: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       9     0  this   Lexample/A;

Expectation

The LineNumberTable should only contain line 5: 0
Or it should contain line 4: 0 and line 5: 3

[nicolasstucki]

These are the position of the trees in genBCode

package example@<1> {
  class A extends Object {
    def <init>(): Unit =
      {
        super@<3>@<3>()@<3>
        ()@<3>
      }@<3>
    @<4>
    def bar(): Unit =
      {
        println@<5>("bar"@<5>)@<5>
      }@<4>
    @<4>
  }@<3>
}@<1>

It is probably an issue in the backend.