19585
89%

Ran 26 Aug 2020 12:33AM UTC

Jobs 1

Files 395

Run time 28s

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Build # 19585

Build Type

push

travis-ci

Committed by

web-flow

Commit Message

core, alts, cronet: fix ByteBuffer covariant method usages (#7349)

Java 9 introduces overridden methods with covariant return types for the following methods in java.nio.ByteBuffer:

- position(int newPosition)
- limit(int newLimit)
- flip()
- clear()
- mark()
- reset()
- rewind()

In Java 9 they all now return ByteBuffer, whereas the methods they override return Buffer, resulting in exceptions like this when executing on Java 8 and lower:

java.lang.NoSuchMethodError: java.nio.ByteBuffer.limit(I)Ljava/nio/ByteBuffer

This is because the generated byte code includes the static return type of the method, which is not found on Java 8 and lower because the overloaded methods with covariant return types don't exist (the issue appears even with source and target 8 or lower in compilation parameters).
The solution is to cast ByteBuffer instances to Buffer before calling the method.

Run Details

24804 of 28522 relevant lines covered (86.96%)

0.87 hits per line

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ID	Job ID	Ran	Files	Coverage
1	19585.1 (GRADLE_OPTS=-Xmx512m LDFLAGS=-L/tmp/protobuf/lib CXXFLAGS=-I/tmp/protobuf/include LD_LIBRARY_PATH=/tmp/protobuf/lib)	26 Aug 2020 12:33AM UTC	0	86.96	Travis Job 19585.1

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