lesterfan opened a new issue, #45532: URL: https://github.com/apache/arrow/issues/45532
### Describe the bug, including details regarding any error messages, version, and platform. `RunEndEncodedBuilder->Finish()` doesn't properly reset the builder state when called as specified by the [docstring](https://github.com/apache/arrow/blob/6a47e4d28cdc4592fe6a458dbe5efe3b17a090e5/cpp/src/arrow/array/builder_base.h#L201). Additionally, the function isn't idempotent and crashes the program when called twice. ``` ASSERT_OK_AND_ASSIGN(std::shared_ptr<ArrayBuilder> builder, MakeBuilder(ree_type)); ASSERT_OK(builder->AppendNull()); ASSERT_EQ(builder->length(), 1); ASSERT_OK(builder->Finish()); ASSERT_EQ(builder->length(), 0); // Fails: the length is still 1 ASSERT_OK(builder->Finish()); '_error_or_value190.status()' failed with Invalid: Run-end encoded array has non-zero length 516, but run ends array has zero length ``` ### Component(s) C++ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
