4 files changed, 54 insertions, 2 deletions
diff --git a/backendC/CleanCompilerSources/backend.h b/backendC/CleanCompilerSources/backend.h
index acfcf3e..004eb88 100644
--- a/backendC/CleanCompilerSources/backend.h
+++ b/backendC/CleanCompilerSources/backend.h
@@ -1,7 +1,7 @@
 /* version info */
 
 // increment this for every release
-# define	kBEVersionCurrent				0x02000213
+# define	kBEVersionCurrent				0x02000214
 
 // change this to the same value as kBEVersionCurrent if the new release is not
 // upward compatible (for example when a function is added)
@@ -9,7 +9,7 @@
 
 // change this to the same value as kBEVersionCurrent if the new release is not
 // downward compatible (for example when a function is removed)
-# define	kBEVersionOldestImplementation	0x02000213
+# define	kBEVersionOldestImplementation	0x02000214
 
 
 # define	kBEDebug	1
diff --git a/backendC/CleanCompilerSources/codegen3.c b/backendC/CleanCompilerSources/codegen3.c
index b5e6b83..5a5d370 100644
--- a/backendC/CleanCompilerSources/codegen3.c
+++ b/backendC/CleanCompilerSources/codegen3.c
@@ -860,9 +860,33 @@ static void CodeNormalRootNode (Node root,NodeId rootid,int asp,int bsp,CodeGenN
 			CodeRootSelection (root, rootid, asp, bsp,code_gen_node_ids_p,resultstate);
 			return;
 		case fail_symb:
+#if CLEAN2
+		{
+			IdentS case_ident_s;
+			SymbDefS case_def_s;
+
+			case_ident_s.ident_name=rootsymb->symb_string;
+			Assume (case_ident_s.ident_name != NULL, "codegen3", "CodeNormalRootNode (fail_symb)");
+
+			case_def_s.sdef_ident = &case_ident_s;
+			case_def_s.sdef_line = 0;
+
+			StaticMessage (FunctionMayFailIsError, "%D", "case may fail", &case_def_s);
+
+			if (! (IsOnBStack (resultstate) || 
+						(IsSimpleState (resultstate) && resultstate.state_kind==StrictRedirection)))
+				/* root needed */
+				asp++;
+
+			GenCaseNoMatchError (&case_def_s,asp,bsp);
+
+			return;
+		}
+#else /* ifndef CLEAN2 */
 			error_in_function ("CodeNormalRootNode");
 /*			JumpToNextAlternative (asp, bsp); */
 			return;
+#endif
 		case string_denot:
 			GenPopA (asp);
 			GenPopB (bsp);
diff --git a/backendC/CleanCompilerSources/instructions.c b/backendC/CleanCompilerSources/instructions.c
index 9e29575..b2d380b 100644
--- a/backendC/CleanCompilerSources/instructions.c
+++ b/backendC/CleanCompilerSources/instructions.c
@@ -3393,6 +3393,31 @@ void GenNoMatchError (SymbDef sdef,int asp,int bsp,int string_already_generated)
 	}
 }
 
+#if CLEAN2
+void GenCaseNoMatchError (SymbDefP case_def,int asp,int bsp)
+{
+	static int case_number;
+
+	GenPopA (asp);
+	GenPopB (bsp);
+
+	put_instruction_b (pushD);
+	FPrintF (OutFile, "m_%s", CurrentModule);
+
+	put_instruction_b (pushD);
+	FPrintF (OutFile, "case_fail%u",case_number);
+
+	GenJmp (&match_error_lab);
+	
+	put_directive_ (Dstring);
+	FPrintF (OutFile, "case_fail%u \"",case_number);		
+	PrintSymbolOfIdent (case_def->sdef_ident,case_def->sdef_line,OutFile);
+	FPrintF (OutFile, "\"");		
+
+	case_number++;
+}
+#endif
+
 static void GenImpLab (char *label_name)
 {
 	put_directive_b (implab);
diff --git a/backendC/CleanCompilerSources/instructions.h b/backendC/CleanCompilerSources/instructions.h
index 532aee7..8cd809b 100644
--- a/backendC/CleanCompilerSources/instructions.h
+++ b/backendC/CleanCompilerSources/instructions.h
@@ -187,6 +187,9 @@ void InitFileInfo (ImpMod imod);
 /* void GenFileInfo (void); */
 
 void GenNoMatchError (SymbDef sdef,int asp,int bsp,int string_already_generated);
+#if CLEAN2
+void GenCaseNoMatchError (SymbDefP case_def,int asp,int bsp);
+#endif
 
 void InitInstructions (void);