Inconsistent Stack Map when inserting throw Expression with Java 7 ------------------------------------------------------------------ Key: JASSIST-207 URL: https://issues.jboss.org/browse/JASSIST-207 Project: Javassist Issue Type: Bug Affects Versions: 3.18.0-GA Reporter: Ben Romberg Assignee: Shigeru Chiba Priority: Critical I wrote a unit-test for javassist, reproducing the issue: {code} public class ThrowExpressionCorruptsStackMapTableTest extends JvstTestRoot { public ThrowExpressionCorruptsStackMapTableTest(String name) { super(name); } public void testInsertLocalVars() throws Exception { CtClass cc = sloader.get("test4.LocalVars"); CtMethod m1 = cc.getDeclaredMethod("run"); m1.insertBefore("throw new AssertionError((Object) \"assertion error\");"); cc.writeFile(); Object obj = make(cc.getName()); assertEquals(10, invoke(obj, "run")); } } {code} Throws: java.lang.VerifyError: Expecting a stack map frame in method test4.LocalVars.run()I at offset 45 My use-case is almost the same, inserting a "throw AssertionError(...)" expression with insertBefore. However, I get a slightly different error message: Stack map does not match the one at exception handler 37 in method timeofday.TimeOfDay.getSecond()I at offset 27