David Estes created GROOVY-9517:
-----------------------------------
Summary: CompileStatic typeCasting runtime error from Class Array
to Class List
Key: GROOVY-9517
URL: https://issues.apache.org/jira/browse/GROOVY-9517
Project: Groovy
Issue Type: Bug
Components: Static compilation
Affects Versions: 3.0.3, 3.0.2, 2.4.19, 2.4.0
Environment: Java: openjdk version "1.8.0_242"
OS: OS X Catalina 10.15.3
Groovy: 2.4.19
Reporter: David Estes
After upgrading asset-pipeline-core from groovy 2.0.7 to 2.4.15 then 2.4.19 . A
bug was identified with @CompileStatic not properly handling runtime type
casting when sorting an Array instead of a List
Example
Create File TestFile.groovy
{code:java}
import groovy.transform.CompileStaticpublic class TestFile { static void
main(String[] args) {
File file = new File('.')
TestFile testFile = new TestFile()
testFile.listSortedFiles(file)
}
@CompileStatic
void listSortedFiles(File directory) {
File[] files = directory.listFiles()
files = files?.sort { File a, File b -> a.name.compareTo b.name
} as File[]
for(File file in files) {
}
}
}
{code}
Then simply run:
{code:java}
groovy TestFile.groovy
{code}
Exception:
{code:java}
Caught: java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to
[Ljava.io.File;
java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to
[Ljava.io.File;
at TestFile.listSortedFiles(TestFile.groovy:15)
at TestFile$listSortedFiles.call(Unknown Source)
at TestFile.main(TestFile.groovy:8)
{code}
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