[jboss-jira] [JBoss JIRA] (JASSIST-175) NPE while replacing FieldAccess with an instruction

[ https://issues.jboss.org/browse/JASSIST-175?page=com.atlassian.jira.plugi... ] Celestino Bellone updated JASSIST-175: -------------------------------------- Description: Hi guys, I built an application that plays with load-time instrumentation. It worked well until I tested it on java7. I had the same problem of PowerMock people (class VerifyError) so I switched to 3.17 snapshot; then I got the followin error while replacing a field access: {noformat} java.lang.NullPointerException at javassist.bytecode.stackmap.MapMaker.fixTypes(MapMaker.java:285) at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:140) at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:99) at javassist.bytecode.MethodInfo.rebuildStackMap(MethodInfo.java:423) at javassist.bytecode.MethodInfo.rebuildStackMapIf6(MethodInfo.java:405) at javassist.expr.ExprEditor.doit(ExprEditor.java:113) at javassist.CtClassType.instrument(CtClassType.java:1398) at com.ejisto.core.classloading.ClassTransformer.transform(ClassTransformer.java:182) at com.ejisto.core.classloading.ClassTransformer.transform(ClassTransformer.java:137) at sun.instrument.TransformerManager.transform(TransformerManager.java:188) at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:424) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:791) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2901) at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1170) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556) at org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1209) [cut] {noformat} I found this issue running my application with javassist 3.17 on both java7 and java6. here attached you can find the code that reproduces this error. Many thanks for your help! was: Hi guys, I built an application that plays with load-time instrumentation. It worked well since I tested it on java7. I had the same problem of PowerMock people (class VerifyError) so I switched to 3.17 snapshot; then I got the followin error while replacing a field access: {noformat} java.lang.NullPointerException at javassist.bytecode.stackmap.MapMaker.fixTypes(MapMaker.java:285) at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:140) at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:99) at javassist.bytecode.MethodInfo.rebuildStackMap(MethodInfo.java:423) at javassist.bytecode.MethodInfo.rebuildStackMapIf6(MethodInfo.java:405) at javassist.expr.ExprEditor.doit(ExprEditor.java:113) at javassist.CtClassType.instrument(CtClassType.java:1398) at com.ejisto.core.classloading.ClassTransformer.transform(ClassTransformer.java:182) at com.ejisto.core.classloading.ClassTransformer.transform(ClassTransformer.java:137) at sun.instrument.TransformerManager.transform(TransformerManager.java:188) at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:424) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:791) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2901) at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1170) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556) at org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1209) [cut] {noformat} I found this issue running my application with javassist 3.17 on both java7 and java6. here attached you can find the code that reproduces this error. Many thanks for your help! -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira