Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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2.0.0, 2.0.1
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None
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64-bit Linux JDK 1.7.0.5
Description
Compiling this fails:
import groovy.transform.TypeChecked @TypeChecked class Foo { private void doIt() { Closure<Void> c = { List<String> list = new ArrayList<String>() String s = "foo" 10.times { list.add(s) } } } }
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Foo.groovy: 11: [Static type checking] - A closure shared variable [list] has been assigned with various types and the method [add(java.lang.Object <E>)] does not exist in the lowest upper bound of those types: [java.util.ArrayList <java.lang.String>]. In general, this is a bad practice (variable reuse) because the compiler cannot determine safely what is the type of the variable at the moment of the call in a multithreaded context.
@ line 11, column 17.
list.add(s)
^
1 error
The error only occurs when a closure is involved. The following works fine:
import groovy.transform.TypeChecked @TypeChecked class Bar { void doIt() { List<String> list = new ArrayList<String>() String s = "foo" 10.times { list.add(s) } } }