[GROOVY-1286] Inconsistent behavior between positive indices and negative indices.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 1.0-JSR-5
• Fix Version/s: 1.5
• Environment: WinXP SP2
• Assignee: Unassigned
• Reporter: Ryan Misek
• Created: 31/Mar/06 14:26
• Updated: 25/Oct/10 10:27
• Resolved: 03/Dec/07 22:03

Description

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def list = [1,2,3,4,5,6,7,8,9]

println list[99] // null is returned
println list[-99] // throws java.lang.ArrayIndexOutOfBoundsException
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Stack trace:
Caught: java.lang.ArrayIndexOutOfBoundsException: Negative array index [-99] too large for array size 9
at test.run(test.groovy:5)
at test.main(test.groovy)

To me, this seems to be inconsistent behavior for two similar expressions.