-Runtime error: Uninitialized attribute _a2 (alt/base_attr_isset_alt4.nit:100)
+Runtime error: Uninitialized attribute _a2 (alt/base_attr_isset_alt4.nit:43)
1
false
false
3
true
false
+1
+false
+false
+2
+true
+false
+3
+true
+false
+4
+false
+false
+false
+5
+true
+false
+false
+6
+true
+true
+false
+7
+true
+true
+true
+1