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JavaHL: Fix issue #2979: javahl's SVNAdmin::load() sometimes passes a null

data buffer to the read() method of the caller's InputInterface.

JNIUtil::makeByteArray was returning NULL when the requested byte[] length

was 0. This in turn was provoked by a read(length=0) on the svn_stream_t

loading a repository dump. read(0) is perfectly valid (albeit superfluous),

such as when parsing a property value with length zero.

The fix just returns a byte[] with length 0 as requested from JNIUtil.cpp.

[ in subversion/bindings/javahl/ ]

* tests/org/tigris/subversion/javahl/

(testLoadRepo): Added test for issue 2979

* tests/org/tigris/subversion/javahl/

(OneTest): Tweaked inner class optionally not to load sample files

into the test repository. Keep behavior expected by existing tests.

* tests/data/issue2979.dump

Data for reproducible test case of issue #2979.

* native/JNIUtil.cpp

(makeJByteArray) Do not treat byte[0] and NULL as equivalent.

Patch by: Dave Brown <>

Reviewed by: hwright

  1. … 3 more files in changeset.