Can't set breakpoint on SWI-Prolog 8.3.22-1 for MacOSX

[EricZinda]

In the stable build (SWI-Prolog 8.2.4-1 for MacOSX 10.12 (Sierra) and later on intel) I can:

?- consult("/.../Bug.pl").
true.

?- gtrace, test.

And put the cursor to the left of the task_adjective__ex predicate and set a breakpoint using the graphical debugger.

After installing SWI-Prolog 8.3.22-1 for MacOSX 10.12 (Sierra) I can no longer do this. The breakpoint button in the debugger does nothing.

Bug.txt