[jboss-jira] [JBoss JIRA] Resolved: (JASSIST-43) ConstPool.getItem(int) returns unexpected item, causes exceptions in calling methods; e.g. in getFieldrefClassName(...) and getInterfaceMethodrefClassName(...)

ConstPool.getItem(int) returns unexpected item, causes exceptions in calling methods; e.g. in getFieldrefClassName(...) and getInterfaceMethodrefClassName(...) --------------------------------------------------------------------------------------------------------------------------------------------------------------- Key: JASSIST-43 URL: https://jira.jboss.org/jira/browse/JASSIST-43 Project: Javassist Issue Type: Bug Environment: $ uname -a Darwin [...] 8.11.1 Darwin Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386 i386 i386 $ java -version java version "1.5.0_13" Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_13-b05-241) Java HotSpot(TM) Client VM (build 1.5.0_13-121, mixed mode, sharing) Javassist 3.6.0 Reporter: Martin Burger Assignee: Shigeru Chiba I am using subclasses of javassist.expr.ExprEditor to heavily instrument classes. On some large (in terms of amount of code) classes I get various exceptions in ConstPool, for example: Caused by: java.lang.ClassCastException: javassist.bytecode.ClassInfo at javassist.bytecode.ConstPool.getFieldrefClassName(ConstPool.java:254) at javassist.expr.FieldAccess.getClassName(FieldAccess.java:97) at javassist.expr.FieldAccess.getCtClass(FieldAccess.java:89) at javassist.expr.FieldAccess.getField(FieldAccess.java:112) And: Caused by: java.lang.NullPointerException at javassist.bytecode.ConstPool.getInterfaceMethodrefClassName(ConstPool.java:413) at javassist.expr.MethodCall.getClassName(MethodCall.java:91) at javassist.expr.MethodCall.getCtClass(MethodCall.java:75) at javassist.expr.MethodCall.getMethod(MethodCall.java:114) It seems that ConstPool.getItem(int) returns an "unexpected" item, so (1) the cast to FieldrefInfo fails and (2) the returned item is null instead of an instance of InterfaceMethodrefInfo, respectively.