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@@ -1,3 +1,38 @@
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+Unreleased Changes
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+
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+ Protocol Compiler
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+ * The proto compiler no longer requires a .proto filename when it is not
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+ generating code.
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+
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+ C++
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+ * Arenas are now unconditionally enabled. cc_enable_arenas no longer has
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+ any effect.
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+ * Fix a memory corruption bug in reflection when mixing optional and
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+ non-optional fields.
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+ * Make SpaceUsed() calculation more thorough for map fields.
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+ * Add stack overflow protection for text format with unknown field values.
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+ * FieldPath::FollowAll() now returns a bool to signal if an out-of-bounds
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+ error was encountered.
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+ * Performance improvements for Map.
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+ * Minor formatting fix when dumping a descriptor to .proto format with
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+ DebugString.
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+ * UBSAN fix in RepeatedField (#2073).
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+ * When running under ASAN, skip a test that makes huge allocations.
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+ * Fixed a crash that could happen when creating more than 256 extensions in
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+ a single message.
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+
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+ Java
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+ * Bugfix in mergeFrom() when a oneof has multiple message fields.
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+
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+ Python
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+ * Print google.protobuf.NullValue as null instead of "NULL_VALUE" when it is
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+ used outside WKT Value/Struct.
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+ * Fix bug occurring when attempting to deep copy an enum type in python 3.
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+
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+ Go:
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+ * Update go_package options to reference google.golang.org/protobuf module.
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+
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+
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2020-07-14 version 3.13.0-rc1 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
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C++:
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Joshua Haberman