[C++] Replace With Mask not correctly replacing nulls

[asfimport]

I'm working in ARROW-1699 and using the method ReplaceWithArrayMask for replace the nulls using a generated mask, but the method gave me unexpected results when the input Array contains nulls and this nulls are replaced with values.
When testing this special Test on vector_test_replace_test.cc

this->Assert(ReplaceWithMask, this->array("[1, null, 1]"),
   this->mask("[false, true, false]"),
   this->array("[7]"),
   this->array("[1, 7, 1]"));

The result is:

Actual:
[
1,
null,
1
]

And  debugging the code, the output values is correct, but the null_bitmap isn't updated and keep the original null_bitmap
In the file vector_replace.cc  on line 202, the bitmap is updated only for turnoff the null replacement values

This is and expected behavior or an issue on ReplaceWithArrayMask ? 

Reporter: Alvin Chunga Mamani / @AlvinJ15
Assignee: Alvin Chunga Mamani / @AlvinJ15

Original Issue Attachments:

• image-2021-11-22-15-51-30-120.png

PRs and other links:

• GitHub Pull Request #11759

_{Note: This issue was originally created as ARROW-14795. Please see the migration documentation for further details.}

[asfimport]

David Li / @lidavidm:
Thanks for filing this. As commented on ARROW-9430 this is a bug and should be fixed.

[asfimport]

David Li / @lidavidm:
Issue resolved by pull request 11759
#11759