{"record":{"id":"f92fd2deb09ff409","repo":"oracle/graal","slug":"expected-an-object-constant","errorCode":null,"errorMessage":"Expected an object constant","messagePattern":"Expected an object constant","errorType":"validation","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"espresso-compiler-stub/src/com.oracle.truffle.espresso.vmaccess/src/com/oracle/truffle/espresso/vmaccess/EspressoExternalMethodHandleAccessProvider.java","lineNumber":68,"sourceCode":"    @Override\n    public ResolvedJavaMethod resolveInvokeBasicTarget(JavaConstant methodHandle, boolean forceBytecodeGeneration) {\n        if (!(Objects.requireNonNull(methodHandle) instanceof EspressoExternalObjectConstant objectConstant)) {\n            return null;\n        }\n        Value result = access.invokeJVMCIHelper(\"resolveInvokeBasicTarget\", objectConstant.getValue(), forceBytecodeGeneration);\n        if (result.isNull()) {\n            return null;\n        }\n        return new EspressoExternalResolvedJavaMethod(result, access);\n    }\n\n    @Override\n    public ResolvedJavaMethod resolveLinkToTarget(JavaConstant memberName) {\n        if (Objects.requireNonNull(memberName).isNull()) {\n            return null;\n        }\n        if (!(memberName instanceof EspressoExternalObjectConstant objectConstant)) {\n            throw new IllegalArgumentException(\"Expected an object constant\");\n        }\n        Value result = access.invokeJVMCIHelper(\"resolveLinkToTarget\", objectConstant.getValue());\n        if (result.isNull()) {\n            return null;\n        }\n        if (result.isString()) {\n            throw new IllegalArgumentException(result.asString());\n        }\n        return new EspressoExternalResolvedJavaMethod(result, access);\n    }\n}\n","sourceCodeStart":50,"sourceCodeEnd":80,"githubUrl":"https://github.com/oracle/graal/blob/a66e9ccd1d7bf2552883939aa0788dfd0e294aab/espresso-compiler-stub/src/com.oracle.truffle.espresso.vmaccess/src/com/oracle/truffle/espresso/vmaccess/EspressoExternalMethodHandleAccessProvider.java#L50-L80","documentation":"Error \"Expected an object constant\" thrown in oracle/graal.","triggerScenarios":"Thrown at espresso-compiler-stub/src/com.oracle.truffle.espresso.vmaccess/src/com/oracle/truffle/espresso/vmaccess/EspressoExternalMethodHandleAccessProvider.java:68 when the library encounters an invalid state.","commonSituations":"Occurs when a caller violates the contract guarded by this check: Expected an object constant","solutions":["Fix the condition reported by the error: Expected an object constant","Check the throwing call site and ensure its documented preconditions (argument values, types, environment, or configuration) are satisfied before the call."],"exampleFix":"Validate inputs and environment so that the failing condition does not occur: Expected an object constant","handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"a66e9ccd1d7bf2552883939aa0788dfd0e294aab","analyzedAt":"2026-08-14T13:58:47.161Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}