Details
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Bug
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Resolution: Won't Fix
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P4
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None
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8, 9
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generic
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generic
Description
FULL PRODUCT VERSION :
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+116)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+116, mixed mode)
ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.10586]
A DESCRIPTION OF THE PROBLEM :
The java.util.function.Consumer interface has a utility "andThen" method for chaining Consumers. The implementation calls each Consumer recursively, and a long chain leads to a stack overflow. The other functional interfaces might have similar problems.
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Construct a long Consumer chain, by calling the andThen method.
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expected to see a long printout of dots.
ACTUAL -
Exception in thread "main" java.lang.StackOverflowError
at java.util.function.Consumer.lambda$andThen$0(java.base@9-ea/Consumer.java:65)
at java.util.function.Consumer.lambda$andThen$0(java.base@9-ea/Consumer.java:65)
at java.util.function.Consumer.lambda$andThen$0(java.base@9-ea/Consumer.java:65)
...
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
public class ConsumerTest implements Consumer<Object> {
public static void main(String[] args) throws Exception {
Consumer<Object> c = new ConsumerTest();
for (int i=0; i<10000; i++) {
c = c.andThen(new ConsumerTest());
}
c.accept(null);
}
@Override
public void accept(Object obj) {
System.out.print('.');
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
Define a custom class for chaining Consumers.
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+116)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+116, mixed mode)
ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.10586]
A DESCRIPTION OF THE PROBLEM :
The java.util.function.Consumer interface has a utility "andThen" method for chaining Consumers. The implementation calls each Consumer recursively, and a long chain leads to a stack overflow. The other functional interfaces might have similar problems.
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Construct a long Consumer chain, by calling the andThen method.
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expected to see a long printout of dots.
ACTUAL -
Exception in thread "main" java.lang.StackOverflowError
at java.util.function.Consumer.lambda$andThen$0(java.base@9-ea/Consumer.java:65)
at java.util.function.Consumer.lambda$andThen$0(java.base@9-ea/Consumer.java:65)
at java.util.function.Consumer.lambda$andThen$0(java.base@9-ea/Consumer.java:65)
...
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
public class ConsumerTest implements Consumer<Object> {
public static void main(String[] args) throws Exception {
Consumer<Object> c = new ConsumerTest();
for (int i=0; i<10000; i++) {
c = c.andThen(new ConsumerTest());
}
c.accept(null);
}
@Override
public void accept(Object obj) {
System.out.print('.');
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
Define a custom class for chaining Consumers.
Attachments
Issue Links
- duplicates
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JDK-6804517 Some languages need to be able to perform tail calls
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- Open
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