graal.js fails when re-running js function with exception

[gzoller]

(spoiler): I have a github repo that's minimized to demonstrate this issue with the least possible code: https://github.com/gzoller/GraalBoom

I'm using the Invoker interface on Oracle JVM with graal.js. (I've also tried the Context interface w/same result).

I have a Java class with a Map data member that I've converted to a ProxyObject. I want to access this member in JS after passing in the object to a JS function.

My github code shows how I'm creating/passing these objects. I'm using sbt to run my test.

If I fire up sbt and type 'test', the very first run works great--expected result. But each subsequent run in the same sbt session produces the exception below. Here's what I notice: graal is looking for something called "getField" in my ProxyObject, but the ProxyObject interface specifies no such member, so...Boom!

If I completely exit sbt and re-enter/re-run, the first time run works again, then the same exception.

[info] - Does it work *** FAILED *** [info] javax.script.ScriptException: org.graalvm.polyglot.PolyglotException: java.lang.IllegalStateException: java.lang.IllegalAccessException: no such field: com.test.Options.hash/com.test.MapProxyObject/getField [info] at com.oracle.truffle.js.scriptengine.GraalJSScriptEngine.invoke(GraalJSScriptEngine.java:402) [info] at com.oracle.truffle.js.scriptengine.GraalJSScriptEngine.invokeFunction(GraalJSScriptEngine.java:390) [info] at com.test.GraalBoom.jsRun(GraalBoom.scala:17) [info] at com.test.TestMe.$anonfun$new$1(TestMe.scala:12) [info] at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85) [info] at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83) [info] at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104) [info] at org.scalatest.Transformer.apply(Transformer.scala:22) [info] at org.scalatest.Transformer.apply(Transformer.scala:20) [info] at org.scalatest.FunSpecLike$$anon$1.apply(FunSpecLike.scala:455) [info] ... [info] Cause: org.graalvm.polyglot.PolyglotException: java.lang.IllegalStateException: java.lang.IllegalAccessException: no such field: com.test.Options.hash/com.test.MapProxyObject/getField [info] at com.oracle.truffle.polyglot.HostFieldDesc$MHImpl.makeGetMethodHandle(HostFieldDesc.java:200) [info] at com.oracle.truffle.polyglot.HostFieldDesc$MHImpl.get(HostFieldDesc.java:156) [info] at com.oracle.truffle.polyglot.HostObject$ReadFieldNode.doCached(HostObject.java:1151) [info] at com.oracle.truffle.polyglot.HostObjectFactory$ReadFieldNodeGen.executeAndSpecialize(HostObjectFactory.java:1272) [info] at com.oracle.truffle.polyglot.HostObjectFactory$ReadFieldNodeGen.execute(HostObjectFactory.java:1237) [info] at com.oracle.truffle.polyglot.HostObject.readMember(HostObject.java:239) [info] at com.oracle.truffle.polyglot.HostObjectGen$InteropLibraryExports$Cached.readMemberNode_AndSpecialize(HostObjectGen.java:1221) [info] at com.oracle.truffle.polyglot.HostObjectGen$InteropLibraryExports$Cached.readMember(HostObjectGen.java:1199) [info] at com.oracle.truffle.api.interop.InteropLibraryGen$CachedDispatch.readMember(InteropLibraryGen.java:2983) [info] at com.oracle.truffle.js.nodes.access.PropertyGetNode$ForeignPropertyGetNode.foreignGet(PropertyGetNode.java:913) [info] ... [info] - Does it work 2 *** FAILED *** [info] org.graalvm.polyglot.PolyglotException: java.lang.IllegalStateException: java.lang.IllegalAccessException: no such field: com.test.Options2.hash/org.graalvm.polyglot.proxy.ProxyObject/getField [info] at com.oracle.truffle.polyglot.HostFieldDesc$MHImpl.makeGetMethodHandle(HostFieldDesc.java:200) [info] at com.oracle.truffle.polyglot.HostFieldDesc$MHImpl.get(HostFieldDesc.java:156) [info] at com.oracle.truffle.polyglot.HostObject$ReadFieldNode.doCached(HostObject.java:1151) [info] at com.oracle.truffle.polyglot.HostObjectFactory$ReadFieldNodeGen.executeAndSpecialize(HostObjectFactory.java:1272) [info] at com.oracle.truffle.polyglot.HostObjectFactory$ReadFieldNodeGen.execute(HostObjectFactory.java:1237) [info] at com.oracle.truffle.polyglot.HostObject.readMember(HostObject.java:239) [info] at com.oracle.truffle.polyglot.HostObjectGen$InteropLibraryExports$Cached.readMemberNode_AndSpecialize(HostObjectGen.java:1221) [info] at com.oracle.truffle.polyglot.HostObjectGen$InteropLibraryExports$Cached.readMember(HostObjectGen.java:1199) [info] at com.oracle.truffle.api.interop.InteropLibraryGen$CachedDispatch.readMember(InteropLibraryGen.java:2983) [info] at com.oracle.truffle.js.nodes.access.PropertyGetNode$ForeignPropertyGetNode.foreignGet(PropertyGetNode.java:913) [info] ... [

[woess]

This looks like a class loader issue.

Here's the cause of the IllegalAccessException:
java.lang.LinkageError: loader constraint violation: when resolving field "hash" the class loader (instance of <bootloader>) of the referring class, com/test/Options, and the class loader (instance of sbt/internal/inc/classpath/ClasspathUtilities$$anon$1) for the field's resolved type, com/test/MapProxyObject, have different Class objects for that type

[woess]

Thanks for the report! A fix for the bug is in master (https://github.com/oracle/graal/commit/c53864afa586192fe12ac0ac07430c936f3fc7cc) and will be included in the next release.

[gzoller]

Hello... I was eager to try the fix with the 19.0.2 release. Did this fix make it in that build? The problem still exists in 19.0.2.

[gzoller]

Never mind. 19.1.0 just dropped and I'm not seeing the issue any more. Thank you!