mypaint_460.patch

diff --git a/gui/freehand.py b/gui/freehand.py
index a9b4c64..7a3f81f 100644
--- a/gui/freehand.py
+++ b/gui/freehand.py
@@ -10,6 +10,7 @@
 ## Imports
 
 import math
+from sys import float_info
 from numpy import array
 from numpy import isfinite
 from lib.helpers import clamp
@@ -41,6 +42,7 @@ EVCOMPRESSION_WORKAROUND_DISABLE_VIA_API = 1
 EVCOMPRESSION_WORKAROUND_EVHACK_FILTER = 2
 EVCOMPRESSION_WORKAROUND_NONE = 999
 
+MAX_SQR = math.sqrt(float_info.max)
 
 ## Class defs
 
@@ -510,7 +512,7 @@ class FreehandMode (gui.mode.BrushworkModeMixin,
         # Check whether tilt is present.  For some tablets without
         # tilt support GTK reports a tilt axis with value nan, instead
         # of None.  https://gna.org/bugs/?17084
-        if xtilt is None or ytilt is None or not isfinite(xtilt+ytilt):
+        if xtilt is None or ytilt is None or not isfinite(xtilt+ytilt) or xtilt >= MAX_SQR or ytilt >= MAX_SQR or xtilt <= -MAX_SQR or ytilt <= -MAX_SQR:
             xtilt = 0.0
             ytilt = 0.0
         else: