Happened somewhere between ab3e02 (works) and 67516a (doesn't work).

In 67516a (current HEAD), when I attempt to launch the Text tool, the following is printed on stderr:

Warning:  Script Exception:
 "ReferenceError: Can't find variable: RTextBasedData" 
Warning:  "<anonymous>()@/tmp/qcad/scripts/Draw/Text/TextDialog/TextDialog.js:838"          

The Tool options toolbar does appear and it can be interacted with. The Text tool does not appear at all (and text input in the Toolbar can not be placed either).

In ab3e02, the Text tool works as usual.

Hope I got it right this time -- several clean builds have been made to double-check results.