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[tmodes <1843135@xxxxxxxxxxxxxxxxxx>]

The backtrace show that the crash happens in some X window function.
This is an indication that Hugin runs on Wayland.
Try setting GDK_BACKEND to x11 explicitly before running Hugin:
GDK_BACKEND=x11 hugin
If this works, then your hugin is not compiled with the needed Wayland patch.

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https://bugs.launchpad.net/bugs/1843135

Title:
  hugin/2019.0.0+dfsg-2  debian sid/testing crashing on start (mad64 as
  well x86)/32bit

Status in Hugin:
  New

Bug description:
  greetings to the team!

  on both of my machines (x86/32bit and amd64) the debian-package of
  hugin crashes on start with the same behaviour.

  $ hugin

  (hugin:24142): Gtk-CRITICAL **: 17:54:57.385: gtk_widget_set_size_request: assertion 'height >= -1' failed
  ...
  /usr/share/hugin/data/plugins/top_five.py
     CAT:Control Points
     NAM:keep 5 CPs per image pair
     fails @api-max
  /usr/share/hugin/data/plugins/woa.py
     CAT:Control Points
     NAM:Warped Overlap Analysis
     fails @api-max
  /usr/share/hugin/data/plugins/crop_cp.py
     CAT:Control Points
     NAM:Crop Control Points
     fails @api-max
  /usr/share/hugin/data/plugins/shooting_pattern.py
     CAT:initial distribution
     NAM:6-1-1 Shooting Pattern
     fails @api-max
  Aborted

  unfortununatly no further informations are available.

  this behaviour starts after upgrading system from BUSTER to
  BULLSEYE/SID/TESTING. yes Xwayland is in use, but this is not new.
  hugin worked perfectly under the BUSTER - which was using Xwayland as
  well.

  I'm using hugin since the early days - a favorite project at all

  best regards carsten

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