Index: bug_files/Poly_rewrite/intersect.gtl
===================================================================
--- bug_files/Poly_rewrite/intersect.gtl	(nonexistent)
+++ bug_files/Poly_rewrite/intersect.gtl	(revision 36169)
@@ -0,0 +1,277 @@
+G04 start of page 2 for group 3 layer_idx 0 *
+G04 Title: USB hub, top_copper *
+G04 Creator: pcb-rnd 3.0.4-rc1 *
+G04 CreationDate: 2022-04-16 10:40:19 UTC *
+G04 For:  *
+G04 Format: Gerber/RS-274X *
+G04 PCB-Dimensions: 393701 393701 *
+G04 PCB-Coordinate-Origin: lower left *
+%MOIN*%
+%FSLAX25Y25*%
+%LNTOP_COPPER_NONE_3*%
+%ADD11C,0.0001*%
+G54D11*G36*
+X379921Y379528D02*Y170866D01*
+X195079D01*
+Y259744D01*
+X196850D01*
+X196912Y259748D01*
+X196972Y259762D01*
+X197030Y259786D01*
+X197083Y259818D01*
+X197130Y259859D01*
+X197170Y259906D01*
+X197202Y259959D01*
+X197226Y260016D01*
+X197240Y260076D01*
+X197245Y260138D01*
+X197240Y260200D01*
+X197226Y260260D01*
+X197202Y260317D01*
+X197170Y260370D01*
+X197130Y260417D01*
+X197083Y260457D01*
+X197030Y260490D01*
+X196972Y260513D01*
+X196912Y260528D01*
+X196851Y260531D01*
+X197244D01*
+Y260925D01*
+X197248Y260863D01*
+X197262Y260803D01*
+X197286Y260746D01*
+X197318Y260693D01*
+X197359Y260646D01*
+X197406Y260606D01*
+X197459Y260573D01*
+X197516Y260550D01*
+X197576Y260535D01*
+X197638Y260530D01*
+X197700Y260535D01*
+X197760Y260550D01*
+X197817Y260573D01*
+X197870Y260606D01*
+X197917Y260646D01*
+X197957Y260693D01*
+X197990Y260746D01*
+X198013Y260803D01*
+X198028Y260863D01*
+X198031Y260925D01*
+Y265059D01*
+X198028Y265121D01*
+X198013Y265181D01*
+X197990Y265238D01*
+X197957Y265291D01*
+X197917Y265338D01*
+X197870Y265379D01*
+X197817Y265411D01*
+X197760Y265435D01*
+X197700Y265449D01*
+X197638Y265454D01*
+X197576Y265449D01*
+X197516Y265435D01*
+X197458Y265411D01*
+X197406Y265379D01*
+X197359Y265338D01*
+X197318Y265291D01*
+X197286Y265238D01*
+X197262Y265181D01*
+X197248Y265121D01*
+X197244Y265059D01*
+Y265453D01*
+X196851D01*
+X196912Y265456D01*
+X196972Y265471D01*
+X197030Y265495D01*
+X197083Y265527D01*
+X197130Y265567D01*
+X197170Y265614D01*
+X197202Y265667D01*
+X197226Y265724D01*
+X197240Y265785D01*
+X197245Y265846D01*
+X197240Y265908D01*
+X197226Y265968D01*
+X197202Y266026D01*
+X197170Y266079D01*
+X197130Y266126D01*
+X197083Y266166D01*
+X197030Y266198D01*
+X196972Y266222D01*
+X196912Y266237D01*
+X196850Y266240D01*
+X195079D01*
+Y379528D01*
+X379921D01*
+G37*
+
+X195079D02*Y266240D01*
+X193307D01*
+X193245Y266237D01*
+X193185Y266222D01*
+X193128Y266198D01*
+X193075Y266166D01*
+X193028Y266126D01*
+X192988Y266079D01*
+X192955Y266026D01*
+X192931Y265968D01*
+X192917Y265908D01*
+X192912Y265846D01*
+X192917Y265785D01*
+X192931Y265724D01*
+X192955Y265667D01*
+X192988Y265614D01*
+X193028Y265567D01*
+X193075Y265527D01*
+X193128Y265495D01*
+X193185Y265471D01*
+X193245Y265456D01*
+X193307Y265453D01*
+X192913D01*
+Y265059D01*
+X192910Y265121D01*
+X192895Y265181D01*
+X192872Y265238D01*
+X192839Y265291D01*
+X192799Y265338D01*
+X192752Y265379D01*
+X192699Y265411D01*
+X192642Y265435D01*
+X192581Y265449D01*
+X192520Y265454D01*
+X192458Y265449D01*
+X192398Y265435D01*
+X192340Y265411D01*
+X192288Y265379D01*
+X192240Y265338D01*
+X192200Y265291D01*
+X192168Y265238D01*
+X192144Y265181D01*
+X192130Y265121D01*
+X192126Y265059D01*
+Y260925D01*
+X192130Y260863D01*
+X192144Y260803D01*
+X192168Y260746D01*
+X192200Y260693D01*
+X192240Y260646D01*
+X192288Y260606D01*
+X192340Y260573D01*
+X192398Y260550D01*
+X192458Y260535D01*
+X192520Y260530D01*
+X192581Y260535D01*
+X192642Y260550D01*
+X192699Y260573D01*
+X192752Y260606D01*
+X192799Y260646D01*
+X192839Y260693D01*
+X192872Y260746D01*
+X192895Y260803D01*
+X192910Y260863D01*
+X192913Y260925D01*
+Y260531D01*
+X193307D01*
+X193245Y260528D01*
+X193185Y260513D01*
+X193128Y260490D01*
+X193075Y260457D01*
+X193028Y260417D01*
+X192988Y260370D01*
+X192955Y260317D01*
+X192931Y260260D01*
+X192917Y260200D01*
+X192912Y260138D01*
+X192917Y260076D01*
+X192931Y260016D01*
+X192955Y259959D01*
+X192988Y259906D01*
+X193028Y259859D01*
+X193075Y259818D01*
+X193128Y259786D01*
+X193185Y259762D01*
+X193245Y259748D01*
+X193307Y259744D01*
+X195079D01*
+Y170866D01*
+X189173D01*
+Y259744D01*
+X191308D01*
+X191339Y259742D01*
+X191462Y259751D01*
+X191462Y259751D01*
+X191583Y259780D01*
+X191697Y259828D01*
+X191803Y259893D01*
+X191897Y259973D01*
+X191978Y260067D01*
+X192042Y260173D01*
+X192090Y260287D01*
+X192119Y260408D01*
+X192128Y260531D01*
+X192126Y260562D01*
+Y265422D01*
+X192128Y265453D01*
+X192119Y265576D01*
+X192090Y265697D01*
+X192042Y265811D01*
+X191978Y265917D01*
+X191897Y266011D01*
+X191803Y266092D01*
+X191697Y266156D01*
+X191583Y266204D01*
+X191462Y266233D01*
+X191339Y266243D01*
+X191308Y266240D01*
+X189173D01*
+Y379528D01*
+X195079D01*
+
+G36*
+X189173D02*Y266240D01*
+X187039D01*
+X187008Y266243D01*
+X186885Y266233D01*
+X186884Y266233D01*
+X186764Y266204D01*
+X186649Y266157D01*
+X186544Y266092D01*
+X186449Y266011D01*
+X186369Y265917D01*
+X186304Y265811D01*
+X186257Y265697D01*
+X186228Y265576D01*
+X186218Y265453D01*
+X186220Y265422D01*
+Y260562D01*
+X186218Y260531D01*
+X186228Y260408D01*
+X186257Y260287D01*
+X186304Y260173D01*
+X186369Y260067D01*
+X186449Y259973D01*
+X186544Y259893D01*
+X186649Y259828D01*
+X186764Y259780D01*
+X186884Y259751D01*
+X187008Y259742D01*
+X187039Y259744D01*
+X189173D01*
+Y170866D01*
+X13780D01*
+Y379528D01*
+X189173D01*
+G37*
+G36*
+X187008Y260531D02*Y265453D01*
+X191339D01*
+Y260531D01*
+X187008D01*
+G37*
+G36*
+X192913D02*Y265453D01*
+X197244D01*
+Y260531D01*
+X192913D01*
+G37*
+M02*
Index: bug_files/Poly_rewrite/intersect.lht
===================================================================
--- bug_files/Poly_rewrite/intersect.lht	(nonexistent)
+++ bug_files/Poly_rewrite/intersect.lht	(revision 36169)
@@ -0,0 +1,960 @@
+ha:pcb-rnd-board-v8 {
+
+ ha:meta {
+   ha:size {
+    thermal_scale = 0.500000
+    x = 100.0mm
+    y = 100.0mm
+   }
+   ha:grid {
+    spacing = 0.1mm
+    offs_x = 0.0
+    offs_y = 0.0
+   }
+   board_name = USB hub
+ }
+
+ ha:data {
+  li:padstack_prototypes {
+
+   ha:ps_proto_v6.0 {
+     hdia=0.3mm; hplated=1; htop=0; hbottom=0;
+     li:shape {
+
+       ha:ps_shape_v4 {
+        ha:ps_circ { x=0.0; y=0.0; dia=0.6mm;        }
+        ha:combining {        }
+        ha:layer_mask {
+         copper = 1
+         top = 1
+        }
+        clearance=0.0
+       }
+
+       ha:ps_shape_v4 {
+        ha:ps_circ { x=0.0; y=0.0; dia=0.6mm;        }
+        ha:combining {        }
+        ha:layer_mask {
+         bottom = 1
+         copper = 1
+        }
+        clearance=0.0
+       }
+
+       ha:ps_shape_v4 {
+        ha:ps_circ { x=0.0; y=0.0; dia=0.6mm;        }
+        ha:combining {        }
+        ha:layer_mask {
+         copper = 1
+         intern = 1
+        }
+        clearance=0.0
+       }
+     }
+  name = 0.3/0.6
+   }
+
+   ha:ps_proto_v6.1 {
+     hdia=0.5mm; hplated=1; htop=0; hbottom=0;
+     li:shape {
+
+       ha:ps_shape_v4 {
+        ha:ps_circ { x=0.0; y=0.0; dia=0.8mm;        }
+        ha:combining {        }
+        ha:layer_mask {
+         copper = 1
+         top = 1
+        }
+        clearance=0.0
+       }
+
+       ha:ps_shape_v4 {
+        ha:ps_circ { x=0.0; y=0.0; dia=0.8mm;        }
+        ha:combining {        }
+        ha:layer_mask {
+         bottom = 1
+         copper = 1
+        }
+        clearance=0.0
+       }
+
+       ha:ps_shape_v4 {
+        ha:ps_circ { x=0.0; y=0.0; dia=0.8mm;        }
+        ha:combining {        }
+        ha:layer_mask {
+         copper = 1
+         intern = 1
+        }
+        clearance=0.0
+       }
+     }
+  name = 0.5/0.8
+   }
+
+   ha:ps_proto_v6.2 {
+     hdia=3.2mm; hplated=1; htop=0; hbottom=0;
+     li:shape {
+
+       ha:ps_shape_v4 {
+        ha:ps_circ { x=0.0; y=0.0; dia=4.8mm;        }
+        ha:combining {        }
+        ha:layer_mask {
+         copper = 1
+         top = 1
+        }
+        clearance=0.0
+       }
+
+       ha:ps_shape_v4 {
+        ha:ps_circ { x=0.0; y=0.0; dia=4.8mm;        }
+        ha:combining {        }
+        ha:layer_mask {
+         bottom = 1
+         copper = 1
+        }
+        clearance=0.0
+       }
+
+       ha:ps_shape_v4 {
+        ha:ps_circ { x=0.0; y=0.0; dia=4.8mm;        }
+        ha:combining {        }
+        ha:layer_mask {
+         copper = 1
+         intern = 1
+        }
+        clearance=0.0
+       }
+
+        ha:ps_shape_v4 {
+         ha:ps_circ { x=0.0; y=0.0; dia=4.9524mm;         }
+         ha:combining { sub=1; auto=1;         }
+         ha:layer_mask {
+          top = 1
+          mask = 1
+         }
+         clearance=0.0
+        }
+
+        ha:ps_shape_v4 {
+         ha:ps_circ { x=0.0; y=0.0; dia=4.9524mm;         }
+         ha:combining { sub=1; auto=1;         }
+         ha:layer_mask {
+          bottom = 1
+          mask = 1
+         }
+         clearance=0.0
+        }
+     }
+  name = mounting hole
+   }
+
+   ha:ps_proto_v6.3 {
+     hdia=0.0; hplated=1; htop=0; hbottom=0;
+     li:shape {
+
+       ha:ps_shape_v4 {
+        ha:combining {        }
+        ha:layer_mask {
+         copper = 1
+         top = 1
+        }
+        clearance=0.0
+         li:ps_poly {
+          -4.75mm  
+          -4.75mm  
+          -4.75mm  
+          4.75mm  
+          4.75mm  
+          4.75mm  
+          4.75mm  
+          -4.75mm  
+         }
+       }
+
+       ha:ps_shape_v4 {
+        ha:combining {        }
+        ha:layer_mask {
+         bottom = 1
+         copper = 1
+        }
+        clearance=0.0
+         li:ps_poly {
+          -4.75mm  
+          -4.75mm  
+          -4.75mm  
+          4.75mm  
+          4.75mm  
+          4.75mm  
+          4.75mm  
+          -4.75mm  
+         }
+       }
+
+       ha:ps_shape_v4 {
+        ha:combining {        }
+        ha:layer_mask {
+         copper = 1
+         intern = 1
+        }
+        clearance=0.0
+         li:ps_poly {
+          -4.75mm  
+          -4.75mm  
+          -4.75mm  
+          4.75mm  
+          4.75mm  
+          4.75mm  
+          4.75mm  
+          -4.75mm  
+         }
+       }
+     }
+  name = USB-A
+   }
+
+    ha:ps_proto_v6.4 {
+      hdia=5.5mm; hplated=1; htop=0; hbottom=0;
+      li:shape {
+
+        ha:ps_shape_v4 {
+         ha:ps_circ { x=0.0; y=0.0; dia=11.0mm;         }
+         ha:combining {         }
+         ha:layer_mask {
+          copper = 1
+          top = 1
+         }
+         clearance=0.0
+        }
+
+        ha:ps_shape_v4 {
+         ha:ps_circ { x=0.0; y=0.0; dia=11.0mm;         }
+         ha:combining {         }
+         ha:layer_mask {
+          bottom = 1
+          copper = 1
+         }
+         clearance=0.0
+        }
+
+        ha:ps_shape_v4 {
+         ha:ps_circ { x=0.0; y=0.0; dia=11.0mm;         }
+         ha:combining {         }
+         ha:layer_mask {
+          copper = 1
+          intern = 1
+         }
+         clearance=0.0
+        }
+      }
+  name = DC barrel
+    }
+
+     ha:ps_proto_v6.5 {
+       hdia=0.0; hplated=1; htop=0; hbottom=0;
+       li:shape {
+
+         ha:ps_shape_v4 {
+          ha:combining {          }
+          ha:layer_mask {
+           copper = 1
+           top = 1
+          }
+          clearance=0.0
+           li:ps_poly {
+            -5.75mm  
+            -5.75mm  
+            -5.75mm  
+            5.75mm  
+            5.75mm  
+            5.75mm  
+            5.75mm  
+            -5.75mm  
+           }
+         }
+
+         ha:ps_shape_v4 {
+          ha:combining {          }
+          ha:layer_mask {
+           bottom = 1
+           copper = 1
+          }
+          clearance=0.0
+           li:ps_poly {
+            -5.75mm  
+            -5.75mm  
+            -5.75mm  
+            5.75mm  
+            5.75mm  
+            5.75mm  
+            5.75mm  
+            -5.75mm  
+           }
+         }
+
+         ha:ps_shape_v4 {
+          ha:combining {          }
+          ha:layer_mask {
+           copper = 1
+           intern = 1
+          }
+          clearance=0.0
+           li:ps_poly {
+            -5.75mm  
+            -5.75mm  
+            -5.75mm  
+            5.75mm  
+            5.75mm  
+            5.75mm  
+            5.75mm  
+            -5.75mm  
+           }
+         }
+       }
+       name = USB-B
+     }
+  }
+
+   li:objects {
+            ha:subc.159264 {
+             ha:attributes {
+              value=20pF
+              footprint=CAPC1608X92N.lht
+              refdes=C26
+             }
+            ha:data {
+                        li:padstack_prototypes {
+
+             ha:ps_proto_v6.0 {
+               hdia=0.0; hplated=0; htop=0; hbottom=0;
+               li:shape {
+
+                 ha:ps_shape_v4 {
+                  ha:combining {                  }
+                  ha:layer_mask {
+                   copper = 1
+                   top = 1
+                  }
+                  clearance=0.2mm
+                   li:ps_poly {
+                    -0.625mm  
+                    -0.55mm  
+                    0.625mm  
+                    -0.55mm  
+                    0.625mm  
+                    0.55mm  
+                    -0.625mm  
+                    0.55mm  
+                   }
+                 }
+
+                 ha:ps_shape_v4 {
+                  ha:combining { sub=1; auto=1;                  }
+                  ha:layer_mask {
+                   top = 1
+                   mask = 1
+                  }
+                  clearance=0.0
+                   li:ps_poly {
+                    -0.675mm  
+                    -0.6mm  
+                    0.675mm  
+                    -0.6mm  
+                    0.675mm  
+                    0.6mm  
+                    -0.675mm  
+                    0.6mm  
+                   }
+                 }
+
+                 ha:ps_shape_v4 {
+                  ha:combining { auto=1;                  }
+                  ha:layer_mask {
+                   top = 1
+                   paste = 1
+                  }
+                  clearance=0.0
+                   li:ps_poly {
+                    -0.625mm  
+                    -0.55mm  
+                    0.625mm  
+                    -0.55mm  
+                    0.625mm  
+                    0.55mm  
+                    -0.625mm  
+                    0.55mm  
+                   }
+                 }
+               }
+             }
+            }
+
+             li:objects {
+              ha:padstack_ref.159303 {
+               proto=0; x=48.05mm; y=33.2mm; rot=90.000000; xmirror=0; smirror=0; clearance=0.2mm;
+               ha:flags {
+                clearline=1
+               }
+
+               li:thermal {
+               }
+
+               ha:attributes {
+                 term=1
+                 name=1
+               }
+              }
+              ha:padstack_ref.159304 {
+               proto=0; x=1.9507874in; y=33.2mm; rot=90.000000; xmirror=0; smirror=0; clearance=0.2mm;
+               ha:flags {
+                clearline=1
+               }
+
+               li:thermal {
+                 li:2 {
+                  on  
+                  diag  
+                  round  
+                  noshape  
+                 }
+               }
+
+               ha:attributes {
+                 term=2
+                 name=2
+               }
+              }
+             }
+             li:layers {
+
+              ha:subc-aux {
+               lid=0
+               ha:combining {               }
+
+                li:objects {
+                 ha:line.159265 {
+                  x1=48.8mm; y1=33.2mm; x2=48.8mm; y2=33.2mm; thickness=0.1mm; clearance=0.0;
+                  ha:attributes {
+                    subc-role=origin
+                  }
+                 }
+                 ha:line.159268 {
+                  x1=48.8mm; y1=33.2mm; x2=48.8mm; y2=32.2mm; thickness=0.1mm; clearance=0.0;
+                  ha:attributes {
+                    subc-role=x
+                  }
+                 }
+                 ha:line.159271 {
+                  x1=48.8mm; y1=33.2mm; x2=49.8mm; y2=33.2mm; thickness=0.1mm; clearance=0.0;
+                  ha:attributes {
+                    subc-role=y
+                  }
+                 }
+                 ha:line.159274 {
+                  x1=48.8mm; y1=33.2mm; x2=48.8mm; y2=33.2mm; thickness=0.1mm; clearance=0.0;
+                  ha:attributes {
+                    subc-role=pnp-origin
+                  }
+                 }
+                }
+                ha:type {
+                 top = 1
+                 misc = 1
+                 virtual = 1
+                }
+              }
+
+              ha:top-silkscreen {
+               lid=1
+               ha:combining {               }
+
+                li:objects {
+                 ha:line.159277 {
+                  x1=47.9mm; y1=34.125mm; x2=49.7mm; y2=34.125mm; thickness=0.2mm; clearance=0.0;
+                 }
+                 ha:line.159280 {
+                  x1=47.9mm; y1=32.275mm; x2=49.7mm; y2=32.275mm; thickness=0.2mm; clearance=0.0;
+                 }
+                }
+                ha:type {
+                 silk = 1
+                 top = 1
+                }
+              }
+
+              ha:top-assembly {
+               lid=2
+               ha:combining {               }
+
+                li:objects {
+                 ha:line.159283 {
+                  x1=48.8mm; y1=33.9mm; x2=48.8mm; y2=32.5mm; thickness=0.1mm; clearance=0.0;
+                 }
+                 ha:line.159286 {
+                  x1=48.1mm; y1=33.2mm; x2=49.5mm; y2=33.2mm; thickness=0.1mm; clearance=0.0;
+                 }
+                 ha:line.159289 {
+                  x1=48.0mm; y1=33.6mm; x2=48.0mm; y2=32.8mm; thickness=0.1mm; clearance=0.0;
+                 }
+                 ha:line.159292 {
+                  x1=48.0mm; y1=32.8mm; x2=49.6mm; y2=32.8mm; thickness=0.1mm; clearance=0.0;
+                 }
+                 ha:line.159295 {
+                  x1=49.6mm; y1=32.8mm; x2=49.6mm; y2=33.6mm; thickness=0.1mm; clearance=0.0;
+                 }
+                 ha:line.159298 {
+                  x1=49.6mm; y1=33.6mm; x2=48.0mm; y2=33.6mm; thickness=0.1mm; clearance=0.0;
+                 }
+                 ha:arc.159301 {
+                  x=48.8mm; y=33.2mm; width=0.5mm; height=0.5mm; astart=90.000000; adelta=360.000000; thickness=0.1mm; clearance=0.0;
+                 }
+                }
+                ha:type {
+                 top = 1
+                 doc = 1
+                }
+                purpose = assy
+              }
+
+              ha:top-courtyard {
+               lid=3
+               ha:combining {               }
+
+                li:objects {
+                 ha:polygon.159305 {
+                  li:geometry {
+                    ta:contour {
+                     { 47.25mm; 34.075mm }
+                     { 47.75mm; 34.075mm }
+                     { 49.85mm; 34.075mm }
+                     { 50.35mm; 34.075mm }
+                     { 50.35mm; 32.325mm }
+                     { 49.85mm; 32.325mm }
+                     { 47.75mm; 32.325mm }
+                     { 47.25mm; 32.325mm }
+                    }
+                  }
+                 }
+                }
+                ha:type {
+                 top = 1
+                 doc = 1
+                }
+                purpose = ko.courtyard
+              }
+
+              ha:top-silk {
+               lid=4
+               ha:combining { auto=1;               }
+
+                li:objects {
+                }
+                ha:type {
+                 silk = 1
+                 top = 1
+                }
+              }
+             }
+            }
+             uid = Z7PWfKk5e3ZiWDedtbcAAAEl
+            }
+   }
+   li:layers {
+
+    ha:top-sig {
+     lid=0
+     group=3
+     ha:combining {     }
+
+      ha:attributes {
+        {pcb-rnd::key::vis}={<Key>l; Shift<Key>t}
+        {pcb-rnd::key::select}={<Key>l; <Key>t}
+      }
+
+      li:objects {
+      }
+      color = {#238b27}
+    }
+
+    ha:bottom-sig {
+     lid=1
+     group=10
+     ha:combining {     }
+
+      ha:attributes {
+        {pcb-rnd::key::vis}={<Key>l; Shift<Key>b}
+        {pcb-rnd::key::select}={<Key>l; <Key>b}
+      }
+
+      li:objects {
+      }
+      color = {#38ee39}
+    }
+
+    ha:top-gnd {
+     lid=2
+     group=3
+     ha:combining {     }
+
+      li:objects {
+       ha:polygon.333076 { clearance=0.4mm;
+        li:geometry {
+          ta:contour {
+           { 3.5mm; 3.6mm }
+           { 96.5mm; 3.6mm }
+           { 96.5mm; 56.6mm }
+           { 3.5mm; 56.6mm }
+          }
+        }
+
+        ha:flags {
+         clearpoly=1
+         lock=1
+        }
+       }
+      }
+      color = {#104e8b}
+    }
+
+    ha:bottom-gnd {
+     lid=3
+     group=10
+     ha:combining {     }
+
+      li:objects {
+      }
+      color = {#6164ff}
+    }
+
+    ha:outline {
+     lid=4
+     group=7
+     ha:combining {     }
+
+      li:objects {
+      }
+      color = {#00868b}
+    }
+
+    ha:bottom-silk {
+     lid=5
+     group=12
+     ha:combining { auto=1;     }
+
+      ha:attributes {
+        {pcb-rnd::key::vis}={<Key>l; Shift<Key>x}
+        {pcb-rnd::key::select}={<Key>l; <Key>x}
+      }
+
+      li:objects {
+      }
+      color = {#000000}
+    }
+
+    ha:top-silk {
+     lid=6
+     group=1
+     ha:combining { auto=1;     }
+
+      ha:attributes {
+        {pcb-rnd::key::vis}={<Key>l; Shift<Key>s}
+        {pcb-rnd::key::select}={<Key>l; <Key>s}
+      }
+
+      li:objects {
+      }
+      color = {#000000}
+    }
+
+    ha:top-paste {
+     lid=7
+     group=0
+     ha:combining { auto=1;     }
+
+      li:objects {
+      }
+      color = {#cd00cd}
+    }
+
+    ha:top-mask {
+     lid=8
+     group=2
+     ha:combining { sub=1; auto=1;     }
+
+      li:objects {
+      }
+      color = {#ff0000}
+    }
+
+    ha:bottom-mask {
+     lid=9
+     group=11
+     ha:combining { sub=1; auto=1;     }
+
+      li:objects {
+      }
+      color = {#ff0000}
+    }
+
+    ha:bottom-paste {
+     lid=10
+     group=13
+     ha:combining { auto=1;     }
+
+      li:objects {
+      }
+      color = {#cd00cd}
+    }
+
+    ha:slot-plated {
+     lid=11
+     group=14
+     ha:combining { auto=1;     }
+
+      li:objects {
+      }
+      color = {#8b7355}
+    }
+
+    ha:slot-unplated {
+     lid=12
+     group=15
+     ha:combining { auto=1;     }
+
+      li:objects {
+      }
+      color = {#00868b}
+    }
+
+    ha:top-assy {
+     lid=13
+     group=16
+     ha:combining {     }
+
+      li:objects {
+      }
+      color = {#444444}
+    }
+
+    ha:bot-assy {
+     lid=14
+     group=17
+     ha:combining {     }
+
+      li:objects {
+      }
+      color = {#444444}
+    }
+
+    ha:fab {
+     lid=15
+     group=18
+     ha:combining { auto=1;     }
+
+      li:objects {
+      }
+      color = {#222222}
+    }
+
+    ha:top-courtyard {
+     lid=16
+     group=8
+     ha:combining {     }
+
+      li:objects {
+      }
+      color = {#104e8b}
+    }
+
+    ha:bot-courtyard {
+     lid=17
+     group=9
+     ha:combining {     }
+
+      li:objects {
+      }
+      color = {#cd3700}
+    }
+
+    ha:top-pwr {
+     lid=18
+     group=3
+     ha:combining {     }
+
+      li:objects {
+      }
+      color = {#c24744}
+    }
+
+    ha:bottom-pwr {
+     lid=19
+     group=10
+     ha:combining {     }
+
+      li:objects {
+      }
+      color = {#ffa457}
+    }
+
+        ha:bottom_shield {
+         lid=20
+         group=10
+         ha:combining {         }
+
+          li:objects {
+           ha:polygon.355623 { clearance=0.4mm;
+            li:geometry {
+              ta:contour {
+               { 3.5mm; 3.6mm }
+               { 6.1mm; 3.6mm }
+               { 6.1mm; 56.6mm }
+               { 3.5mm; 56.6mm }
+              }
+            }
+
+            ha:flags {
+             clearpoly=1
+            }
+           }
+          }
+          color = {#fcff58}
+        }
+
+   }
+ }
+ ha:layer_stack {
+  li:groups {
+   ha:0 {
+    name = top_paste
+    ha:type { top=1; paste=1;    }
+    li:layers { 7;    }
+   }
+   ha:1 {
+    name = top_silk
+    ha:type { silk=1; top=1;    }
+    li:layers { 6;    }
+   }
+   ha:2 {
+    name = top_mask
+    ha:type { top=1; mask=1;    }
+    li:layers { 8;    }
+   }
+   ha:3 {
+    name = top_copper
+    ha:type { copper=1; top=1;    }
+    li:layers { 0; 18; 2;    }
+     ha:attributes {
+      thickness=0.035mm
+     }
+   }
+   ha:4 {
+    ha:type { substrate=1; intern=1;    }
+    li:layers {    }
+    ha:attributes {
+     thickness={0.2mm}
+    }
+     name = grp_4
+   }
+   ha:5 {
+    name = grp_6
+    ha:type {  intern=1; substrate=1;    }
+    li:layers {     }
+   }
+   ha:6 {
+    ha:type { substrate=1; intern=1;    }
+    li:layers {    }
+     name = grp_8
+     ha:attributes {
+      thickness=0.2mm
+     }
+   }
+   ha:7 {
+    name = global_outline
+    ha:type {   boundary=1;    }
+    li:layers { 4;    }
+     purpose = uroute
+   }
+   ha:8 {
+    ha:type {   top=1; doc=1;    }
+    li:layers {      16;}
+    ha:attributes {
+       init-invis=true
+    }
+     name = top-courtyard
+      purpose = ko.courtyard
+   }
+   ha:9 {
+    name = bot-courtyard
+    ha:type {   bottom=1; doc=1;    }
+    li:layers { 17;    }
+    purpose = ko.courtyard
+     ha:attributes {
+      init-invis=true
+     }
+   }
+   ha:10 {
+    name = bottom_copper
+    ha:type {   bottom=1; copper=1;    }
+    li:layers { 1; 19; 3; 20;    }
+     ha:attributes {
+       thickness=0.035mm
+     }
+   }
+   ha:11 {
+    name = bottom_mask
+    ha:type { bottom=1; mask=1;    }
+    li:layers { 9;    }
+   }
+   ha:12 {
+    name = bottom_silk
+    ha:type {  bottom=1; silk=1;    }
+    li:layers { 5;    }
+   }
+   ha:13 {
+    name = bottom_paste
+    ha:type { bottom=1; paste=1;    }
+    li:layers { 10;    }
+   }
+   ha:14 {
+    name = pmech
+    ha:type {   mech=1;    }
+    li:layers { 11;    }
+     purpose = proute
+   }
+   ha:15 {
+    name = umech
+    ha:type {   mech=1;    }
+    li:layers { 12;    }
+     purpose = uroute
+   }
+   ha:16 {
+    name = top_assy
+    ha:type {   top=1; doc=1;    }
+    li:layers { 13;    }
+    purpose = assy
+     ha:attributes {
+      init-invis=1
+     }
+   }
+   ha:17 {
+    name = bot_assy
+    ha:type {   bottom=1; doc=1;    }
+    li:layers { 14;    }
+    purpose = assy
+     ha:attributes {
+      init-invis=1
+     }
+   }
+   ha:18 {
+    name = fab
+    ha:type { top=1; doc=1;    }
+    li:layers { 15;    }
+    ha:attributes {
+     init-invis=1
+    }
+    purpose = fab
+   }
+  }
+ }
+ ha:pixmaps {
+ }
+}
Index: bug_files/Poly_rewrite/intersect.txt
===================================================================
--- bug_files/Poly_rewrite/intersect.txt	(nonexistent)
+++ bug_files/Poly_rewrite/intersect.txt	(revision 36169)
@@ -0,0 +1,6 @@
+Corner case: two clearances happen to have a shared vertical contour line
+in the middle which causes self-intersecting poly on the gerber output.
+
+Poly nohole slicer should probably slice it in the middle, but it may be
+the poly lib that's having a zero sized polygon there?
+