[Mono-bugs] [Bug 27969][Nor] New - mcs compiles invalid code (allows manually calling constructor in base class)
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bugzilla-daemon@rocky.ximian.com
18 Jul 2002 17:50:31 -0000
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Changed by larsde@redloop.com.
http://bugzilla.ximian.com/show_bug.cgi?id=27969
--- shadow/27969 Thu Jul 18 13:50:31 2002
+++ shadow/27969.tmp.20390 Thu Jul 18 13:50:31 2002
@@ -0,0 +1,88 @@
+Bug#: 27969
+Product: Mono/MCS
+Version: unspecified
+OS:
+OS Details:
+Status: NEW
+Resolution:
+Severity:
+Priority: Normal
+Component: Misc
+AssignedTo: mono-bugs@ximian.com
+ReportedBy: larsde@redloop.com
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL:
+Cc:
+Summary: mcs compiles invalid code (allows manually calling constructor in base class)
+
+Description of Problem:
+
+Given classes ClassA and subclass ClassB, ClassB is allowed to manually
+invoke the constructor in the base class if base class provides a default
+constructor. The default constructor is always called even if it doesn't
+match the signature of the call.
+
+If called from constructor in ClassB, constructor does not finish
+executing.
+
+Steps to reproduce the problem:
+
+Try compiling this code
+
+using System;
+
+namespace ConsTest
+{
+
+ class ClassA
+ {
+
+ public ClassA()
+ {
+ Console.WriteLine("Defaultconstructor");
+ }
+
+ public ClassA(string p_string)
+ {
+ Console.WriteLine(p_string + " from ClassA");
+ }
+ }
+
+ class ClassB : ClassA
+ {
+ public ClassB(string p_string)
+ {
+ base.ClassA(p_string);
+ Console.WriteLine("From ClassB: " + p_string);
+ }
+
+ [STAThread]
+ static void Main(string[] args)
+ {
+ ClassB t_b = new ClassB("Yoyoyo");
+ }
+ }
+}
+
+Actual Results:
+
+"Defaultconstructor" is output to console.
+
+Expected Results:
+
+I expected it not to compile. Microsoft's C#-compiler outputs:
+
+C:\Documents and Settings\Lars Thomas Denstad\My
+Documents\Projects\MonoTests\ConsTest\Class1.cs(33): 'ConsTest.ClassA'
+does not contain a definition for 'ClassA'
+
+How often does this happen?
+
+Every time.
+
+Additional Information:
+
+Experienced with mcs downloaded today from
+http://www.superin.formativ.net/mono/download.htm (mono-0.12-15-7-
+2002.exe), Windows XP.