[GROOVY-8609] Fails to compile when upper bound has generics

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0-alpha-3, 3.0.0-alpha-2, 2.5.0
• Fix Version/s: 2.6.0-alpha-4, 3.0.0-alpha-3, 2.5.1
• Component/s: Static compilation, Static Type Checker
• Assignee: Daniel Sun
• Reporter: Daniel Sun
• Created: 27/May/18 11:33
• Updated: 26/Jul/18 04:38
• Resolved: 28/May/18 12:38

Description

Fails to compile the following code:

@groovy.transform.CompileStatic
public class A<T extends List<E>, E extends Map<String, Integer>> {
    E getFirstRecord(T recordList) {
        return recordList.get(0);
    }
}

Error messages:

BUG! exception in phase 'instruction selection' in source unit 'ConsoleScript0' Expected earlier checking to detect generics parameter arity mismatch
Expected: java.util.Map<K,V> 
Supplied: java.util.Map<E> 

	at org.codehaus.groovy.ast.tools.GenericsUtils.extractPlaceholders(GenericsUtils.java:169)

	at org.codehaus.groovy.ast.tools.GenericsUtils.extractPlaceholders(GenericsUtils.java:142)

	at org.codehaus.groovy.ast.GenericsType$GenericsTypeMatcher.compareGenericsWithBound(GenericsType.java:375)

	at org.codehaus.groovy.ast.GenericsType$GenericsTypeMatcher.checkGenerics(GenericsType.java:307)

	at org.codehaus.groovy.ast.GenericsType$GenericsTypeMatcher.matches(GenericsType.java:276)

	at org.codehaus.groovy.ast.GenericsType.isCompatibleWith(GenericsType.java:198)

	at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.checkTypeGenerics(StaticTypeCheckingVisitor.java:1174)

	at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.checkReturnType(StaticTypeCheckingVisitor.java:2076)

	at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor$1.returnStatementAdded(StaticTypeCheckingVisitor.java:309)

	at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitReturnStatement(StaticTypeCheckingVisitor.java:2026)

	at org.codehaus.groovy.ast.stmt.ReturnStatement.visit(ReturnStatement.java:49)

Issue Links

• links to: GitHub Pull Request #730