[Mono-bugs] [Bug 59867][Nor] New - breaking out of a switch within if statement behaves wrongly

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Changed by alan.schmitt@polytechnique.org.

http://bugzilla.ximian.com/show_bug.cgi?id=59867

--- shadow/59867	2004-06-09 09:25:36.000000000 -0400
+++ shadow/59867.tmp.26462	2004-06-09 09:25:36.000000000 -0400
@@ -0,0 +1,87 @@
+Bug#: 59867
+Product: Mono: Compilers
+Version: unspecified
+OS: 
+OS Details: Gentoo
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: C#
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: alan.schmitt@polytechnique.org               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: breaking out of a switch within if statement behaves wrongly
+
+Please fill in this template when reporting a bug, unless you know what you
+are doing.
+Description of Problem:
+
+Doing a break within a if statement does not seem to behave correctly. The
+following program illustrates this:
+class Test {
+    
+  public static void Main (string[] args) {
+    int x_0 = 0;
+    int ll_1 = 0;
+        
+    switch (0) {
+      default:{
+                switch (x_0) {
+                  case 0:{
+                           if (ll_1 == 0) {
+                             System.Console.WriteLine("foo");
+                             break;
+                           } else {
+                             System.Console.WriteLine("** Never Appears **");
+                             goto k_1;
+                           }
+                         }
+                  default:{
+                            System.Console.WriteLine("** Never Appears **");
+                            goto k_1;
+                          }
+                }
+                System.Console.WriteLine("!!!! THIS SHOULD APPEAR !!!!");
+                break;
+              }
+      k_1:{
+                System.Console.WriteLine("**** THIS SHOULD NOT APPEAR ****");
+                break;
+          }
+    }
+  }
+}
+
+Moreover, a spurious Warning about unreachable code is displayed about line
+24 (the "!!!! THIS SHOULD APPEAR !!!!" line).
+
+Steps to reproduce the problem:
+1. compile the previous program
+2. run it
+3. 
+
+Actual Results:
+
+schmitta@charm tmp % mcs simple.cs
+simple.cs(24) warning CS0162: Unreachable code detected
+Compilation succeeded - 1 warning(s)
+schmitta@charm tmp % mono simple.exe                             
+foo
+**** THIS SHOULD NOT APPEAR ****
+
+Expected Results:
+
+no warning, "!!!! THIS SHOULD APPEAR !!!!" should be displayed, and no
+"**** THIS SHOULD NOT APPEAR ****"
+
+How often does this happen? 
+
+All the time.
+
+Additional Information:
+
+I am using the Gentoo ebuild 0.95, which corresponds to the beta 2.