Fixed compiler crash when logging 'omit' (bug 545802)

Change-Id: I6211f01c5074e7056de634d1cc788127b040ecdf
Signed-off-by: Botond Baranyi <botond.baranyi@ericsson.com>

compiler2/Value.cc

@@ -11422,10 +11422,6 @@ void Value::chk_expr_operand_execute_refd(Value *v1,
         switch (la->get_type()) {
         case Ttcn::LogArgument::L_UNDEF:
         case Ttcn::LogArgument::L_ERROR:
-          FATAL_ERROR("%s argument type",
-            u.expr.v_optype == OPTYPE_ANY2UNISTR ? "any2unistr" : "log2str");
-          break; // not reached
-
         case Ttcn::LogArgument::L_MACRO:
         case Ttcn::LogArgument::L_STR:
           break; // self reference not possible

function_test/Semantic_Analyser/TTCN3_SA_ttcn3adhoc_TD.script

@@ -8651,4 +8651,28 @@ is not a reference to a type
 <END_TC>
 :exmp.
 
+*-----------------------------------------------------------*
+:h3.Adhoc:: Bug 545802: log(omit)  
+.*-----------------------------------------------------------*
+:xmp tab=0.
+<TC - Bug 545802: log(omit)
+
+<COMPILE>
+<VERDICT_LEAF FAIL>
+<MODULE TTCN Temp Temp.ttcn>
+module Temp {
+
+control {
+  var charstring x := log2str(omit);
+  log(omit);
+}
+
+}
+<END_MODULE>
+<RESULT IF_FAIL COUNT 2>
+Cannot determine the type of the argument
+<END_RESULT>
+<END_TC>
+:exmp.
+
 :etext.