[GROOVY-561] NullPointerException in Invodker.toTypeString if arg is null

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0-beta-6
• Assignee: Guillaume Sauthier
• Reporter: Stephen Molitor
• Created: 03/Jul/04 19:22
• Updated: 04/Jul/04 12:18
• Resolved: 04/Jul/04 12:18

Description

The Invoker.toTypeString method blows up with a NullPointerException if one of the arguments is null. The NullPointerException occurs on Invoker.java, line 439:

argBuf.append(arguments[i].getClass().getName());

An argument might be null for example if a builder is invoked with a class parameter that either does not exist or has not been imported. For example, a PicoContainerBuidler:

builder.container()

{ component(class : WhoopsIMadeATypo) }

The 'WhoopsIMadeATypo' arg shows up as null in the arguments array passed to Invoker.toString. So we get a NullPointerException Invoker.toString, which makes it really hard to figure out the real cause.

A simple null-check guard would fix this.