Details
-
Bug
-
Status: Resolved
-
Minor
-
Resolution: Fixed
-
None
Description
When a BitmapWriter or FirstTimeBitmapWriter is constructed with length=0 then Finish() is invoked, the byte at start_offset / 8 is zeroed
The following change causes the test to fail:
--- a/cpp/src/arrow/util/bit-util-test.cc
+++ b/cpp/src/arrow/util/bit-util-test.cc
@@ -274,6 +274,10 @@ TEST(FirstTimeBitmapWriter, NormalOperation) {
auto writer = internal::FirstTimeBitmapWriter(bitmap, 10, 3);
WriteVectorToWriter(writer, {0, 0, 0});
}
+ {
+ auto writer = internal::FirstTimeBitmapWriter(bitmap, 13, 0);
+ WriteVectorToWriter(writer, {});
+ }
{
auto writer = internal::FirstTimeBitmapWriter(bitmap, 13, 3);
WriteVectorToWriter(writer, {1, 0, 1});
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