Fix #5916: Fix broken SemanticDB and add it to yml file for CI

.drone.yml

@@ -31,7 +31,7 @@ pipeline:
     image: lampepfl/dotty:2019-02-06
     commands:
       - cp -R . /tmp/2/ && cd /tmp/2/
-      - ./project/scripts/sbt ";dotty-bootstrapped/compile ;dotty-bootstrapped/test ;sjsSandbox/run"
+      - ./project/scripts/sbt ";dotty-bootstrapped/compile ;dotty-bootstrapped/test; dotty-semanticdb/compile; dotty-semanticdb/test:compile;sjsSandbox/run"
       - ./project/scripts/bootstrapCmdTests
 
   community_build:

compiler/src/dotty/tools/backend/jvm/AsmUtils.scala

@@ -2,7 +2,7 @@ package dotty.tools
 package backend
 package jvm
 
-import scala.tools.asm.tree.{AbstractInsnNode}
+import scala.tools.asm.tree.{AbstractInsnNode, ClassNode, MethodNode}
 import java.io.PrintWriter
 import scala.tools.asm.util.{TraceClassVisitor, TraceMethodVisitor, Textifier}
 import scala.tools.asm.ClassReader
@@ -31,7 +31,7 @@ object AsmUtils {
   final val traceSerializedClassEnabled = false
   final val traceSerializedClassPattern = ""
 
-  def traceMethod(mnode: MethodNode1): Unit = {
+  def traceMethod(mnode: MethodNode): Unit = {
     println(s"Bytecode for method ${mnode.name}")
     val p = new Textifier
     val tracer = new TraceMethodVisitor(p)
@@ -41,7 +41,7 @@ object AsmUtils {
     w.flush()
   }
 
-  def traceClass(cnode: ClassNode1): Unit = {
+  def traceClass(cnode: ClassNode): Unit = {
     println(s"Bytecode for class ${cnode.name}")
     val w = new PrintWriter(System.out)
     cnode.accept(new TraceClassVisitor(w))
@@ -50,8 +50,8 @@ object AsmUtils {
 
   def traceClass(bytes: Array[Byte]): Unit = traceClass(readClass(bytes))
 
-  def readClass(bytes: Array[Byte]): ClassNode1 = {
-    val node = new ClassNode1()
+  def readClass(bytes: Array[Byte]): ClassNode = {
+    val node = new ClassNode()
     new ClassReader(bytes).accept(node, 0)
     node
   }

compiler/src/dotty/tools/backend/jvm/BCodeHelpers.scala

@@ -3,7 +3,6 @@ package backend
 package jvm
 
 import scala.tools.asm
-import scala.tools.asm.ClassWriter
 import scala.collection.mutable
 import dotty.tools.io.AbstractFile
 
@@ -127,20 +126,6 @@ trait BCodeHelpers extends BCodeIdiomatic with BytecodeWriters {
     }
   }
 
-  /*
-   * can-multi-thread
-   */
-  def createJAttribute(name: String, b: Array[Byte], offset: Int, len: Int): asm.Attribute = {
-    new asm.Attribute(name) {
-      override def write(classWriter: ClassWriter, code: Array[Byte],
-        codeLength: Int, maxStack: Int, maxLocals: Int): asm.ByteVector = {
-        val byteVector = new asm.ByteVector(len)
-        byteVector.putByteArray(b, offset, len)
-        byteVector
-      }
-    }
-  }
-
   /*
    * Custom attribute (JVMS 4.7.1) "ScalaSig" used as marker only
    * i.e., the pickle is contained in a custom annotation, see:
@@ -166,6 +151,15 @@ trait BCodeHelpers extends BCodeIdiomatic with BytecodeWriters {
       vp
     }
 
+    /*
+     * can-multi-thread
+     */
+    def createJAttribute(name: String, b: Array[Byte], offset: Int, len: Int): asm.Attribute = {
+      val dest = new Array[Byte](len)
+      System.arraycopy(b, offset, dest, 0, len)
+      new asm.CustomAttr(name, dest)
+    }
+
     /*
      * can-multi-thread
      */

compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala

@@ -53,7 +53,7 @@ trait BCodeSkelBuilder extends BCodeHelpers {
     final val MaximumJvmParameters = 254
 
     // current class
-    var cnode: ClassNode1          = null
+    var cnode: asm.tree.ClassNode  = null
     var thisName: String           = null // the internal name of the class being emitted
 
     var claszSymbol: Symbol        = null
@@ -88,7 +88,7 @@ trait BCodeSkelBuilder extends BCodeHelpers {
       isCZStaticModule  = claszSymbol.isStaticModuleClass
       thisName          = internalName(claszSymbol)
 
-      cnode = new ClassNode1()
+      cnode = new asm.tree.ClassNode()
 
       initJClass(cnode)
 
@@ -245,7 +245,7 @@ trait BCodeSkelBuilder extends BCodeHelpers {
     } // end of method addClassFields()
 
     // current method
-    var mnode: MethodNode1         = null
+    var mnode: asm.tree.MethodNode = null
     var jMethodName: String        = null
     var isMethSymStaticCtor        = false
     var returnType: BType          = null
@@ -523,7 +523,7 @@ trait BCodeSkelBuilder extends BCodeHelpers {
         mdesc,
         jgensig,
         mkArrayS(thrownExceptions)
-      ).asInstanceOf[MethodNode1]
+      ).asInstanceOf[asm.tree.MethodNode]
 
       // TODO param names: (m.params map (p => javaName(p.sym)))
 

compiler/src/dotty/tools/backend/jvm/BytecodeWriters.scala

@@ -84,7 +84,7 @@ trait BytecodeWriters {
     private def emitAsmp(jclassBytes: Array[Byte], asmpFile: dotty.tools.io.File): Unit = {
       val pw = asmpFile.printWriter()
       try {
-        val cnode = new ClassNode1()
+        val cnode = new asm.tree.ClassNode()
         val cr    = new asm.ClassReader(jclassBytes)
         cr.accept(cnode, 0)
         val trace = new scala.tools.asm.util.TraceClassVisitor(new java.io.PrintWriter(new java.io.StringWriter()))

compiler/src/dotty/tools/backend/jvm/GenBCode.scala

@@ -7,6 +7,7 @@ import dotty.tools.dotc.core.Phases.Phase
 
 import scala.collection.mutable
 import scala.collection.JavaConverters._
+import scala.tools.asm.CustomAttr
 import dotty.tools.dotc.transform.SymUtils._
 import dotty.tools.dotc.interfaces
 import dotty.tools.dotc.util.SourceFile
@@ -239,7 +240,7 @@ class GenBCodePipeline(val entryPoints: List[Symbol], val int: DottyBackendInter
                 getFileForClassfile(outF, store.name, ".hasTasty")
                 binary
               }
-            val dataAttr = createJAttribute(nme.TASTYATTR.mangledString, tasty, 0, tasty.length)
+            val dataAttr = new CustomAttr(nme.TASTYATTR.mangledString, tasty)
             store.visitAttribute(dataAttr)
           }
 

project/Build.scala

@@ -409,7 +409,7 @@ object Build {
 
       // get libraries onboard
       libraryDependencies ++= Seq(
-        "org.scala-lang.modules" % "scala-asm" % "7.0.0-scala-1", // used by the backend
+        "org.scala-lang.modules" % "scala-asm" % "6.0.0-scala-1", // used by the backend
         // FIXME: Not needed, but should be on the compiler CP
         ("org.scala-lang.modules" %% "scala-xml" % "1.1.0").withDottyCompat(scalaVersion.value),
         "org.scala-lang" % "scala-library" % scalacVersion % "test",

semanticdb/src/dotty/semanticdb/SemanticdbConsumer.scala

@@ -756,7 +756,7 @@ class SemanticdbConsumer(sourceFilePath: java.nio.file.Path) extends TastyConsum
 
       override def traverseTree(tree: Tree)(implicit ctx: Context): Unit = {
         tree match {
-          case Import(path, selectors) =>
+          case Import(_, path, selectors) =>
             val key = (tree.symbol.trueName, tree.pos.start)
             if (!packageDefinitions(key)) {
               packageDefinitions += key