Exception when saving jar

[zhiqiangxu]

This is exception thrown when saving jar(recaf is built from latest code revision 3d83c59):

NegativeArraySizeException:
Message: null
Trace:
org.objectweb.asm.Frame.merge(Frame.java:1447)
org.objectweb.asm.MethodWriter.visitMaxs(MethodWriter.java:1520)
org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:835)
org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:727)
org.objectweb.asm.tree.ClassNode.accept(ClassNode.java:452)
me.coley.recaf.asm.AsmUtil.toBytes(AsmUtil.java:135)
me.coley.recaf.asm.JarData.save(JarData.java:55)
me.coley.recaf.Recaf.saveFile(Recaf.java:100)
me.coley.recaf.ui.Gui$2.actionPerformed(Gui.java:90)
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
javax.swing.AbstractButton.doClick(AbstractButton.java:376)
javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
java.awt.Component.processMouseEvent(Component.java:6533)
javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
java.awt.Component.processEvent(Component.java:6298)
java.awt.Container.processEvent(Container.java:2236)
java.awt.Component.dispatchEventImpl(Component.java:4889)
java.awt.Container.dispatchEventImpl(Container.java:2294)
java.awt.Component.dispatchEvent(Component.java:4711)
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
java.awt.Container.dispatchEventImpl(Container.java:2280)
java.awt.Window.dispatchEventImpl(Window.java:2746)
java.awt.Component.dispatchEvent(Component.java:4711)
java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
java.awt.EventQueue.access$500(EventQueue.java:97)
java.awt.EventQueue$3.run(EventQueue.java:709)
java.awt.EventQueue$3.run(EventQueue.java:703)
java.security.AccessController.doPrivileged(Native Method)
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
java.awt.EventQueue$4.run(EventQueue.java:731)
java.awt.EventQueue$4.run(EventQueue.java:729)
java.security.AccessController.doPrivileged(Native Method)
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Cause: null

[Col-E]

Since its from the latest commit, have you tried verifying the method's code? You can do so by right clicking the method in the method window and selecting "Verify code" from the context menu.

Frame.merge exceptions are typically thrown due to malformed bytecode being parsed during frame generation. Running it through the verifyer should log any obvious errors. If you are sure the code is correct you can disable frame and max's in the ASM options. This will allow you to save the jar, skipping frame generation. Your jar will likely need java argument -noverify to run if these options are disabled. If your code is malformed the program will crash (or behave in an unexpected way).

[Col-E]

Closing for lack of context. Will re-open if re-created.