[TINKERPOP-2345] NullPointerException when Map key is not found for math()

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.4.6
• Fix Version/s: 3.5.0, 3.4.7
• Component/s: process
• Assignee: Stephen Mallette
• Reporter: Stephen Mallette
• Created: 25/Feb/20 20:28
• Updated: 09/Apr/20 11:15
• Resolved: 09/Apr/20 11:15

Description

We could probably have a nicer error here:

gremlin> g.V().hasLabel('person').elementMap().as('x').math('x').by('aged')
java.lang.NullPointerException
Type ':help' or ':h' for help.
Display stack trace? [yN]y
java.lang.NullPointerException
	at org.apache.tinkerpop.gremlin.process.traversal.step.map.MathStep.map(MathStep.java:73)
	at org.apache.tinkerpop.gremlin.process.traversal.step.map.MathStep.map(MathStep.java:47)
	at org.apache.tinkerpop.gremlin.process.traversal.step.map.MapStep.processNextStart(MapStep.java:37)
	at org.apache.tinkerpop.gremlin.process.traversal.step.map.MathStep.processNextStart(MathStep.java:63)
	at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.hasNext(AbstractStep.java:143)
	at org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal.hasNext(DefaultTraversal.java:197)
	at org.apache.tinkerpop.gremlin.console.Console$_closure3.doCall(Console.groovy:255)

Issue Links

• links to: GitHub Pull Request #1272