Netlist browser: fixed a segfault on 'unload all'

testdata/algo/l2n_writer_au.txt

@@ -9,15 +9,15 @@ unit(0.001)
 # This section lists the mask layers (drawing or derived) and their connections.
 
 # Mask layers
-layer(poly)
-layer(poly_lbl)
-layer(diff_cont)
-layer(poly_cont)
-layer(metal1)
-layer(metal1_lbl)
-layer(via1)
-layer(metal2)
-layer(metal2_lbl)
+layer(poly '3/0')
+layer(poly_lbl '3/1')
+layer(diff_cont '4/0')
+layer(poly_cont '5/0')
+layer(metal1 '6/0')
+layer(metal1_lbl '6/1')
+layer(via1 '7/0')
+layer(metal2 '8/0')
+layer(metal2_lbl '8/1')
 layer(psd)
 layer(nsd)
 

testdata/algo/l2n_writer_au_2.txt

@@ -10,16 +10,16 @@ unit(0.001)
 
 # Mask layers
 layer(rbulk)
-layer(nwell)
-layer(poly)
-layer(poly_lbl)
-layer(diff_cont)
-layer(poly_cont)
-layer(metal1)
-layer(metal1_lbl)
-layer(via1)
-layer(metal2)
-layer(metal2_lbl)
+layer(nwell '1/0')
+layer(poly '3/0')
+layer(poly_lbl '3/1')
+layer(diff_cont '4/0')
+layer(poly_cont '5/0')
+layer(metal1 '6/0')
+layer(metal1_lbl '6/1')
+layer(via1 '7/0')
+layer(metal2 '8/0')
+layer(metal2_lbl '8/1')
 layer(ntie)
 layer(psd)
 layer(ptie)

testdata/algo/l2n_writer_au_2s.txt

@@ -2,16 +2,16 @@
 W(RINGO)
 U(0.001)
 L(rbulk)
-L(nwell)
-L(poly)
-L(poly_lbl)
-L(diff_cont)
-L(poly_cont)
-L(metal1)
-L(metal1_lbl)
-L(via1)
-L(metal2)
-L(metal2_lbl)
+L(nwell '1/0')
+L(poly '3/0')
+L(poly_lbl '3/1')
+L(diff_cont '4/0')
+L(poly_cont '5/0')
+L(metal1 '6/0')
+L(metal1_lbl '6/1')
+L(via1 '7/0')
+L(metal2 '8/0')
+L(metal2_lbl '8/1')
 L(ntie)
 L(psd)
 L(ptie)

testdata/algo/l2n_writer_au_s.txt

@@ -1,15 +1,15 @@
 #%l2n-klayout
 W(RINGO)
 U(0.001)
-L(poly)
-L(poly_lbl)
-L(diff_cont)
-L(poly_cont)
-L(metal1)
-L(metal1_lbl)
-L(via1)
-L(metal2)
-L(metal2_lbl)
+L(poly '3/0')
+L(poly_lbl '3/1')
+L(diff_cont '4/0')
+L(poly_cont '5/0')
+L(metal1 '6/0')
+L(metal1_lbl '6/1')
+L(via1 '7/0')
+L(metal2 '8/0')
+L(metal2_lbl '8/1')
 L(psd)
 L(nsd)
 C(poly poly poly_lbl poly_cont)