[GROOVY-849] + operator on null string concat causes exception

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.0-JSR-1
• Fix Version/s: 1.1-beta-2
• Environment: Windows 2000, groovy 1.0 jsr-1, jdk 1.4
• Assignee: Paul King
• Reporter: JJ Furman
• Created: 20/May/05 11:16
• Updated: 26/Sep/07 20:32
• Resolved: 24/Jun/07 05:06

Description

The following program produces an error:

"
class Employee {
String name
int empId

String toString()

{ return name + ": " + empId }

}

e = new Employee()
println e
"

The error is "Cannot invoke method: plus on null object". What I expect to see is "null: 0". I can see why this is happening but I don't know the best way to fix it.

Another issue is that when anything goes wrong in groovy, I get a big stacktrace, java style. As a user of the system, I'd rather just see a concise one line error.

Thanks, keep up the good work. I'm certainly going to keep my eye on this language.
JJ Furman