From fabe64cbcd53f680b00acbb965e13199e5000d50 Mon Sep 17 00:00:00 2001
From: Russell Johnson <47639332+Russ4262@users.noreply.github.com>
Date: Thu, 4 Jun 2020 13:15:10 -0500
Subject: [PATCH] Path: Fix `_makeIntersectionTags()` for very short edges

The 0.25 constant used might need to be modified later.  Or, the entire `_makeIntersectionTags()` method might need to be improved if other micro-edge use cases cause failure.
---
 src/Mod/Path/PathScripts/PathProfile.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/Mod/Path/PathScripts/PathProfile.py b/src/Mod/Path/PathScripts/PathProfile.py
index 87ba301649..ad4ac0536d 100644
--- a/src/Mod/Path/PathScripts/PathProfile.py
+++ b/src/Mod/Path/PathScripts/PathProfile.py
@@ -1266,8 +1266,14 @@ class ObjectProfile(PathAreaOp.ObjectOp):
                             begExt = extTObj
                 else:
                     d = i * mid
-                    cp1 = E.valueAt(E.getParameterByLength(d - spc))
-                    cp2 = E.valueAt(E.getParameterByLength(d + spc))
+                    negTestLen = d - spc
+                    if negTestLen < 0:
+                        negTestLen = d - (LE * 0.25)
+                    posTestLen = d + spc
+                    if posTestLen > LE:
+                        posTestLen = d + (LE * 0.25)
+                    cp1 = E.valueAt(E.getParameterByLength(negTestLen))
+                    cp2 = E.valueAt(E.getParameterByLength(posTestLen))
                     (intTObj, extTObj) = self._makeOffsetCircleTag(cp1, cp2, tagRad, fdv, 'Edge[{}]_'.format(e))
                     if intTObj and extTObj:
                         tagCnt += nt