### java.lang.AssertionError: NoDenotation.owner occurred in the presentation compiler.

[OndrejSpanel]

Compiler version

3.7.1

Minimized code

I have no minímized code, and given how the project is large and the error message not specific, I doubt I can create one.

This happened when I tried to import a large project I am usually working with in IntelliJ into VS Code / Metals.

Output (click arrow to expand)

file:///C:/xxxxxxxxxxxx/Agent.scala

java.lang.AssertionError: NoDenotation.owner

occurred in the presentation compiler.

file:///C:/xxxxxxxxxxxx/Agent.scala

java.lang.AssertionError: NoDenotation.owner

occurred in the presentation compiler.

presentation compiler configuration:

action parameters:
uri: file:///C:/xxxxxxxxxxxxxxx/Agent.scala

Error stacktrace:

dotty.tools.dotc.core.SymDenotations$NoDenotation$.owner(SymDenotations.scala:2609)
	dotty.tools.dotc.core.SymDenotations$SymDenotation.isSelfSym(SymDenotations.scala:715)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:330)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.fold$1(Trees.scala:1636)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.apply(Trees.scala:1638)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.foldOver(Trees.scala:1669)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.traverseChildren(Trees.scala:1771)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:457)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.foldOver(Trees.scala:1677)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.traverseChildren(Trees.scala:1771)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:457)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.fold$1(Trees.scala:1636)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.apply(Trees.scala:1638)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.foldOver(Trees.scala:1675)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.traverseChildren(Trees.scala:1771)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:457)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse$$anonfun$13(ExtractSemanticDB.scala:391)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	scala.collection.immutable.List.foreach(List.scala:334)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:386)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:348)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.fold$1(Trees.scala:1636)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.apply(Trees.scala:1638)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.foldOver(Trees.scala:1669)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.traverseChildren(Trees.scala:1771)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:457)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.foldOver(Trees.scala:1724)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.traverseChildren(Trees.scala:1771)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:354)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse$$anonfun$11(ExtractSemanticDB.scala:377)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	scala.collection.immutable.List.foreach(List.scala:334)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:377)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.apply(Trees.scala:1770)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.foldOver(Trees.scala:1728)
	dotty.tools.dotc.ast.Trees$Instance$TreeAccumulator.foldOver(Trees.scala:1642)
	dotty.tools.dotc.ast.Trees$Instance$TreeTraverser.traverseChildren(Trees.scala:1771)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:351)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse$$anonfun$1(ExtractSemanticDB.scala:315)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	scala.collection.immutable.List.foreach(List.scala:334)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:315)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse$$anonfun$1(ExtractSemanticDB.scala:315)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	scala.collection.immutable.List.foreach(List.scala:334)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:315)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse$$anonfun$1(ExtractSemanticDB.scala:315)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	scala.collection.immutable.List.foreach(List.scala:334)
	dotty.tools.dotc.semanticdb.ExtractSemanticDB$Extractor.traverse(ExtractSemanticDB.scala:315)
	dotty.tools.pc.SemanticdbTextDocumentProvider.textDocument(SemanticdbTextDocumentProvider.scala:36)
	dotty.tools.pc.ScalaPresentationCompiler.semanticdbTextDocument$$anonfun$1(ScalaPresentationCompiler.scala:242)

Short summary:

java.lang.AssertionError: NoDenotation.owner

[tgodzik]

Thanks for reporting! The error is related to semanticdb usage in presentation compiler, this is highly likely it will not work 100% as it's normally just a fallback. We use it when we want to do Organize Imports but the newest semanticdb is not available. What specific issue did you encounter besides this?

The problem itself is easily fixable, but I worry this is just a symptom of a larger problem.

[OndrejSpanel]

What specific issue did you encounter besides this?

I am not sure. I am long time Idea + sbt user, I was just experimenting with VS Code + Metals to check if it might be perhaps an interesting alternative for some tasks. Metals shows most of my sbt projects in a multi-module sbt as "code compiles in the "best effort" mode while depending on errored projects", this is just one of the issues, which seemed most approachable.

All projects compile fine with sbt or IntelliJ, I have little idea where to start getting it work under Metals.

Also it is hard for me to recognize what should be reported as a compiler error and what as Metals or Bloop one.

Another confusing error is:

file:///c:/Dev/tempi-vs/Main.scala

java.lang.AssertionError: assertion failed: attempt to parse java.lang.Object from classfile

occurred in the presentation compiler.

action parameters:
offset: 9
uri: file:///c:/Dev/tempi-vs/Main.scala
text:

object Ma@@

presentation compiler configuration:
Scala version: 3.7.1-bin-nonbootstrapped

There is no Main.scala source anywhere in my project.

[tgodzik]

java.lang.AssertionError: assertion failed: attempt to parse java.lang.Object from classfile

We send a "fake" request to eagerly load the compiler, which is why that file shows up. Any other files are showing that failed assertion? That is a bit worrying.

Also it is hard for me to recognize what should be reported as a compiler error and what as Metals or Bloop one.

It's fine to report most things in Metals, we can always move them or fix upstream if needed.