oracle/graal · error · NullPointerException

value

Error message

value

What it means

Error "value" thrown in oracle/graal.

Source

Thrown at espresso-compiler-stub/src/com.oracle.truffle.espresso.vmaccess/src/com/oracle/truffle/espresso/vmaccess/EspressoExternalResolvedJavaField.java:115

    protected boolean equals0(AbstractEspressoResolvedJavaField that) {
        if (that instanceof EspressoExternalResolvedJavaField espressoField) {
            return vmFieldMirror.equals(espressoField.vmFieldMirror);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return vmFieldMirror.hashCode();
    }

    public Value readValue(Value receiver) {
        return vmFieldMirror.invokeMember("read", receiver);
    }

    void writeValue(JavaConstant receiver, JavaConstant value) {
        if (value == null) {
            throw new NullPointerException("value");
        }

        final Value receiverValue;
        if (isStatic()) {
            if (receiver != null) {
                throw new IllegalArgumentException("Static field write requires null receiver");
            }
            receiverValue = null;
        } else {
            if (receiver == null) {
                throw new NullPointerException("receiver");
            }
            if (receiver.isNull()) {
                throw new IllegalArgumentException("Receiver is null");
            }
            if (!(receiver instanceof EspressoExternalObjectConstant espressoReceiver)) {
                throw new IllegalArgumentException("Expected an espresso object receiver, got " + receiver.getClass().getName());
            }

View on GitHub (pinned to a66e9ccd1d)

Solutions

1. Fix the condition reported by the error: value
2. Check the throwing call site and ensure its documented preconditions (argument values, types, environment, or configuration) are satisfied before the call.

Example fix

Validate inputs and environment so that the failing condition does not occur: value

When it happens

Trigger: Thrown at espresso-compiler-stub/src/com.oracle.truffle.espresso.vmaccess/src/com/oracle/truffle/espresso/vmaccess/EspressoExternalResolvedJavaField.java:115 when the library encounters an invalid state.

Common situations: Occurs when a caller violates the contract guarded by this check: value

AI-assisted analysis of oracle/graal@a66e9ccd1d (2026-08-14). Data as JSON: /api/errors/10403a26e6086034. Report an issue: GitHub.