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A test class containing the opcode iinc_w causes ArrayIndexOutOfBoundsException #485

hagami opened this issue Nov 29, 2017 · 1 comment


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@hagami hagami commented Nov 29, 2017

  • Version of JMockit that was used:

  • Description of the problem:
    A test class below throws ArrayIndexOutOfBoundsException with no StackTrace.

import org.junit.Test;

public class TestClass {
    public void test() {
        int i = 0;
        i += 1000; // compiled to opcode iinc_w

I traced and found that the exception was thrown at mockit.external.asm.MethodReader.readAllLabelsInCodeBlock(
and it was caused by comparison of opcode IINC at

Opcodes.IINC should be used, not InstructionType.IINC.

Same pattern found in MethodReader.readWideInstruction.

@rliesenfeld rliesenfeld self-assigned this Nov 29, 2017
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@rliesenfeld rliesenfeld commented Nov 29, 2017

Thanks for reporting it!

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