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FULL PRODUCT VERSION : java version "1.8.0_20-ea" Java(TM) SE Runtime Environment (build 1.8.0_20-ea-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.20-b14, mixed mode) ADDITIONAL OS VERSION INFORMATION : Linux HOST 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux A DESCRIPTION OF THE PROBLEM : The class provided below compiles using javac 1.8.0_05-b13, but causes a stack overflow exception with javac 1.8.0_20-ea-b14. REGRESSION. Last worked in version 8 ADDITIONAL REGRESSION INFORMATION: java version "1.8.0_05" Java(TM) SE Runtime Environment (build 1.8.0_05-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode) STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : Compile the source code given below. EXPECTED VERSUS ACTUAL BEHAVIOR : EXPECTED - It should compile without problem. ACTUAL - It produces a stack overflow exception shown below. ERROR MESSAGES/STACK TRACES THAT OCCUR : The system is out of resources. Consult the following stack trace for details. java.lang.StackOverflowError at com.sun.tools.javac.code.Type.hasTag(Type.java:97) at com.sun.tools.javac.code.Types$SameTypeVisitor.visitType(Types.java:1102) at com.sun.tools.javac.code.Types$SameTypeVisitor.visitType(Types.java:1088) at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visitTypeVar(Types.java:4404) at com.sun.tools.javac.code.Type$TypeVar.accept(Type.java:1266) at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4398) at com.sun.tools.javac.code.Types.isSameType(Types.java:1082) at com.sun.tools.javac.code.Types.isSameType(Types.java:1077) at com.sun.tools.javac.code.Types.containsTypeEquivalent(Types.java:4061) at com.sun.tools.javac.code.Types.containsTypeEquivalent(Types.java:1436) at com.sun.tools.javac.code.Types$LooseSameTypeVisitor.containsTypes(Types.java:1231) at com.sun.tools.javac.code.Types$SameTypeVisitor.visitClassType(Types.java:1156) at com.sun.tools.javac.code.Types$SameTypeVisitor.visitClassType(Types.java:1088) at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:763) at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4398) ... REPRODUCIBILITY : This bug can be reproduced always. ---------- BEGIN SOURCE ---------- public class StackOverflowBug { interface A<T> { } <T extends A<T>> T m(T v) { return m(v); } } ---------- END SOURCE ----------
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