Fix Closure span assignment in makeClosure

Author: Florian3k

compiler/src/dotty/tools/dotc/ast/Desugar.scala

@@ -1423,7 +1423,9 @@ object desugar {
       DefDef(nme.ANON_FUN, params :: Nil, if (tpt == null) TypeTree() else tpt, body)
         .withSpan(span)
         .withMods(synthetic | Artifact),
-      Closure(Nil, Ident(nme.ANON_FUN), if (isContextual) ContextualEmptyTree else EmptyTree))
+      Closure(Nil, Ident(nme.ANON_FUN), if (isContextual) ContextualEmptyTree else EmptyTree)
+        .withSpan(span)
+    )
 
   /** If `nparams` == 1, expand partial function
    *

compiler/test/dotty/tools/backend/jvm/DottyBytecodeTests.scala

@@ -1682,6 +1682,66 @@ class DottyBytecodeTests extends DottyBytecodeTest {
       assertSameCode(instructions, expected)
     }
   }
+
+  @Test def i15098 = {
+    val source =
+      """object Main {
+        |  def main(args: Array[String]): Unit = {
+        |    Array(1).foreach { n =>
+        |      val x = 123
+        |      println(n)
+        |    }
+        |  }
+        |}
+        """.stripMargin
+
+    checkBCode(source) { dir =>
+      val clsIn   = dir.lookupName("Main$.class", directory = false).input
+      val clsNode = loadClassNode(clsIn, skipDebugInfo = false)
+      val method  = getMethod(clsNode, "main")
+      val instructions = instructionsFromMethod(method).filter(_.isInstanceOf[LineNumber])
+
+      val expected = List(
+        LineNumber(2, Label(0)),
+        LineNumber(3, Label(0)),
+      )
+
+      assertSameCode(instructions, expected)
+    }
+  }
+
+  @Test def i15098_2 = {
+    val source =
+      """object Main {
+        |  def main(args: Array[String]): Unit = {
+        |    Array(1).map { n =>
+        |      val x = 123
+        |      x + n
+        |    }.foreach { n =>
+        |      println(n)
+        |      println(n)
+        |    }
+        |  }
+        |}
+        """.stripMargin
+
+    checkBCode(source) { dir =>
+      val clsIn   = dir.lookupName("Main$.class", directory = false).input
+      val clsNode = loadClassNode(clsIn, skipDebugInfo = false)
+      val method  = getMethod(clsNode, "main")
+      val instructions = instructionsFromMethod(method).filter(_.isInstanceOf[LineNumber])
+
+      val expected = List(
+        LineNumber(2, Label(0)),
+        LineNumber(3, Label(0)),
+        LineNumber(6, Label(17)),
+        LineNumber(3, Label(26)),
+        LineNumber(6, Label(29)),
+      )
+
+      assertSameCode(instructions, expected)
+    }
+  }
 }
 
 object invocationReceiversTestCode {

tests/neg/i9299.scala

@@ -1,4 +1,4 @@
 type F <: F = 1 match { // error
-  case _ => foo.foo // error // error
+  case _ => foo.foo // error
 }
 def foo(a: Int): Unit = ???