Aleks Tamarkin created GROOVY-11745:
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Summary: Groovy5 calling Groovy4 library with setter throws NPE
Key: GROOVY-11745
URL: https://issues.apache.org/jira/browse/GROOVY-11745
Project: Groovy
Issue Type: Bug
Affects Versions: 5.0.0, 4.0.28
Reporter: Aleks Tamarkin
When Groovy5 calls Groovy4 code that sets a property which should be calling a
setter under the hood, an NPE is thrown.
The stack looks like
{code:java}
Exception in thread "main" java.lang.NullPointerException at
java.base/java.lang.Class.isAssignableFrom(Native Method) at
groovy.lang.MetaClassImpl.isVisibleProperty(MetaClassImpl.java:2104) at
groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:2761) at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.setProperty(ScriptBytecodeAdapter.java:509){code}
I am seeing this error fairly randomly on setters.
One example in the Groovy4 code being called by Groovy5 looks like
{code:java}
HttpURLConnection c = "<someUrl>".toURL().openConnection() as HttpURLConnection
...
c.useCaches = false // this line has the error{code}
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