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<TITLE> [Mono-bugs] [Bug 38935][Nor] New - mcs allows derived class constructors to write to readonly fields of a base class
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<H1>[Mono-bugs] [Bug 38935][Nor] New - mcs allows derived class constructors to write to readonly fields of a base class
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<B>bugzilla-daemon@rocky.ximian.com
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<A HREF="mailto:bugzilla-daemon%40rocky.ximian.com"
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TITLE="[Mono-bugs] [Bug 38935][Nor] New - mcs allows derived class constructors to write to readonly fields of a base class">bugzilla-daemon@rocky.ximian.com
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<I>Fri, 28 Feb 2003 23:56:47 -0500 (EST)</I>
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<PRE>Please do not reply to this email- if you want to comment on the bug, go to the
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URL shown below and enter your comments there.
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Changed by <A HREF="mailto:mathpup@mylinuxisp.com.">mathpup@mylinuxisp.com.</A>
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<A HREF="http://bugzilla.ximian.com/show_bug.cgi?id=38935">http://bugzilla.ximian.com/show_bug.cgi?id=38935</A>
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--- shadow/38935 Fri Feb 28 23:56:47 2003
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+++ shadow/38935.tmp.29457 Fri Feb 28 23:56:47 2003
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@@ -0,0 +1,62 @@
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+Bug#: 38935
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+Product: Mono/MCS
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+Version: unspecified
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+OS:
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+OS Details:
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+Status: NEW
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+Resolution:
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+Severity:
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+Priority: Normal
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+Component: Misc
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+AssignedTo: <A HREF="mailto:mono-bugs@ximian.com">mono-bugs@ximian.com</A>
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+ReportedBy: <A HREF="mailto:mathpup@mylinuxisp.com">mathpup@mylinuxisp.com</A>
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+QAContact: <A HREF="mailto:mono-bugs@ximian.com">mono-bugs@ximian.com</A>
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+TargetMilestone: ---
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+URL:
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+Cc:
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+Summary: mcs allows derived class constructors to write to readonly fields of a base class
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+
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+Description of Problem:
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+
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+When a class declared a "readonly" field, only constructors of that class should be
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+able to write to that field. However, mcs permits a derived-class constructor to write
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+to that field, which is incorrect (ECMA 17.4.2).
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+
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+
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+Steps to reproduce the problem:
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+1. Compile program below: mcs readonly.cs
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+
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+Actual Results:
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+
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+``Compilation succeeded''
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+
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+
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+Expected Results:
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+
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+readonly.cs(11,3): error CS0191: A readonly field cannot be assigned to
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+(except in a constructor or a variable initializer)
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+
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+
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+How often does this happen?
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+
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+Always
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+
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+Additional Information:
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+
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+//Compile: mcs readonly.cs
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+public class Base
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+{
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+ public readonly int x;
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+}
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+
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+
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+public class Derived: Base
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+{
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+ public Derived()
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+ {
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+ x = 0;
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+ }
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+
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+
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+ public static void Main() {}
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+}
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