nkurihar opened a new pull request #3729: fix pulsar_message_set_replication_clusters URL: https://github.com/apache/pulsar/pull/3729 ### Motivation `pulsar_message_set_replication_clusters()` in `c_Message.cc` doesn't work. To catch what happens, I executed [the small test code](https://gist.github.com/nkurihar/474ddba7bf2598730bb94ebbb8442117) and saw the infinite loop and finally segmentation fault: ``` c1 1 c2 2 c3 3 ? ? ;? ;? ? < x???8 ???8 ??8 ?8 8 . . . Segmentation fault ``` ### Modifications - Fix the type of the variable `c`: it needs to be not `const char*` but `const char**` - Add the third argument `size` to judge when to stop the loop ### Verifying this change - [ ] Make sure that the change passes the CI checks. ### Does this pull request potentially affect one of the following parts: - The public API: yes This PR changes the interface of `pulsar_message_set_replication_clusters()`. If we want to keep the back compatibility, another option is to add `NULL` to `clusters` as the last element before passing to `pulsar_message_set_replication_clusters()`, and judging when to stop the loop by null check (like `while (*c) { ... }`) in the function. However, I think to force users to add `NULL` as the last element is error-prone, instead adding the size argument is natural.
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