Index: trunk/src/mymem.c
===================================================================
--- trunk/src/mymem.c	(revision 1257)
+++ trunk/src/mymem.c	(revision 1258)
@@ -610,6 +610,7 @@
 	free(pcb->Name);
 	free(pcb->Filename);
 	free(pcb->PrintFilename);
+	rats_patch_destroy(pcb);
 	FreeDataMemory(pcb->Data);
 	free(pcb->Data);
 	/* release font symbols */
Index: trunk/src/rats_patch.c
===================================================================
--- trunk/src/rats_patch.c	(revision 1257)
+++ trunk/src/rats_patch.c	(revision 1258)
@@ -74,6 +74,16 @@
 	n->next = NULL;
 }
 
+void rats_patch_destroy(PCBTypePtr pcb)
+{
+	rats_patch_line_t *n, *next;
+
+	for(n = pcb->NetlistPatches; n != NULL; n = next) {
+		next = n->next;
+		free(n);
+	}
+}
+
 void rats_patch_append_optimize(PCBTypePtr pcb, rats_patch_op_t op, const char *id, const char *a1, const char *a2)
 {
 	rats_patch_op_t seek_op;
Index: trunk/src/rats_patch.h
===================================================================
--- trunk/src/rats_patch.h	(revision 1257)
+++ trunk/src/rats_patch.h	(revision 1258)
@@ -37,6 +37,9 @@
 /* Allocate and append a patch line to the patch list */
 void rats_patch_append(PCBTypePtr pcb, rats_patch_op_t op, const char *id, const char *a1, const char *a2);
 
+/* Free the patch list and all memory claimed by patch list items */
+void rats_patch_destroy(PCBTypePtr pcb);
+
 /* Same as rats_patch_append() but also optimize previous entries so that
    redundant entries are removed */
 void rats_patch_append_optimize(PCBTypePtr pcb, rats_patch_op_t op, const char *id, const char *a1, const char *a2);