diff -urN liblouis-2.6.2.old/liblouis/compileTranslationTable.c liblouis-2.6.2/liblouis/compileTranslationTable.c
--- liblouis-2.6.2.old/liblouis/compileTranslationTable.c	2014-09-02 13:19:23.000000000 +0100
+++ liblouis-2.6.2/liblouis/compileTranslationTable.c	2019-12-05 11:57:39.794000000 +0000
@@ -1836,6 +1823,7 @@
       if (!(ch->attributes & CTC_Letter))
 	{
 	  compileError (nested, "a name may contain only letters");
+	  free(nameRule);
 	  return 0;
 	}
       nameRule->name[k] = name->chars[k];
@@ -4193,7 +4230,7 @@
 	      if (ruleDots.chars[0] == '#')
 		ruleDots.length = ruleDots.chars[0] = 0;
 	      else if (ruleDots.chars[0] == '\\' && ruleDots.chars[1] == '#')
-		memcpy (&ruleDots.chars[0], &ruleDots.chars[1],
+		memmove (&ruleDots.chars[0], &ruleDots.chars[1],
 			ruleDots.length-- * CHARSIZE);
 	    }
 	}