GNAT Stub invocation issue (2026.2).

Thank you for the latest Gnat Studio improvements and release schedule.

Error with the invocation of GNAT Stub with GS 2026.2:

gnatstub -P/Users/me/Tests/tests_gnat.gpr -XBUILD_MODE=Debugging /Users/me/Tests/2024/test_20241227_abstract_ic.ads /Users/me/Tests/2024/
Traceback (most recent call last):
  File "/Users/me/xnadalib-2026/share/gnatstudio/support/core/gnatstub.py", line 38, in on_exit
    if GPS.current_context().file() == self.file:
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
GPS.Unexpected_Exception: unexpected internal exception raised GNATCOLL.SCRIPTS.NO_SUCH_PARAMETER :  2

The actual value of GPS.current_context().file() is None.

A naive workaround is:

--- ./share/gnatstudio/support/core/gnatstub.py@0	2026-04-08 03:21:21
+++ ./share/gnatstudio/support/core/gnatstub.py	2026-06-21 16:45:28
@@ -35,8 +35,11 @@
             # We were not given a location when launching gnatstub:
             # if we are still on the original file, then go to the
             # body of this file.
-            if GPS.current_context().file() == self.file:
-                GPS.execute_action("goto other file")
+            print("GPS:", GPS.current_context().file())
+            print("Self:", self.file)
+            if GPS.current_context().file():
+                if GPS.current_context().file() == self.file:
+                    GPS.execute_action("goto other file")

Start in share/gnatstudio/support/core/gnatstub.py, especially on_exit and its GPS.current_context().file() check. Reproduce with the shown gnatstub command and verify that a None context file no longer raises GPS.Unexpected_Exception while the existing navigation behavior remains intact.