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<TITLE> [Mono-bugs] [Bug 77442][Maj] New - [GMCS] call to a generic method
on null interface field causes SIGSEGV
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<H1>[Mono-bugs] [Bug 77442][Maj] New - [GMCS] call to a generic method
on null interface field causes SIGSEGV</H1>
<B>bugzilla-daemon at bugzilla.ximian.com</B>
<A HREF="mailto:mono-bugs%40lists.ximian.com?Subject=%5BMono-bugs%5D%20%5BBug%2077442%5D%5BMaj%5D%20New%20-%20%5BGMCS%5D%20call%20to%20a%20generic%20method%0A%09on%20null%20interface%20field%20causes%20SIGSEGV&In-Reply-To=bug-77442%40chernobyl.ximian.com"
TITLE="[Mono-bugs] [Bug 77442][Maj] New - [GMCS] call to a generic method
on null interface field causes SIGSEGV">bugzilla-daemon at bugzilla.ximian.com
</A><BR>
<I>Wed Feb 1 23:29:33 EST 2006</I>
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<PRE>Please do not reply to this email- if you want to comment on the bug, go to the
URL shown below and enter your comments there.
Changed by <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">atsushi at ximian.com.</A>
<A HREF="http://bugzilla.ximian.com/show_bug.cgi?id=77442">http://bugzilla.ximian.com/show_bug.cgi?id=77442</A>
--- shadow/77442 2006-02-01 23:29:33.000000000 -0500
+++ shadow/77442.tmp.15583 2006-02-01 23:29:33.000000000 -0500
@@ -0,0 +1,83 @@
+Bug#: 77442
+Product: Mono: Runtime
+Version: 1.1
+OS:
+OS Details:
+Status: NEW
+Resolution:
+Severity:
+Priority: Major
+Component: misc
+AssignedTo: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">martin at ximian.com</A>
+ReportedBy: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">atsushi at ximian.com</A>
+QAContact: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at ximian.com</A>
+TargetMilestone: ---
+URL:
+Cc:
+Summary: [GMCS] call to a generic method on null interface field causes SIGSEGV
+
+The runtime causes SIGSEGV when call to a generic method on a field
+happens, where the type of the field is an interface.
+
+It should report NullReferenceException.
+
+---- repro ----
+using System;
+
+interface ITest
+{
+ void Foo&lt;T&gt; ();
+ void Bar ();
+}
+
+class Test : ITest
+{
+ public void Foo&lt;T&gt; () {}
+
+ public void Bar () {}
+
+ //Test test; // this is OK
+ ITest test;
+
+ public static void Main ()
+ {
+ //new Test ().test.Bar (); // this is OK
+ new Test ().test.Foo&lt;int&gt; ();
+ }
+}
+
+
+Actual Results:
+
+=================================================================
+Got a SIGSEGV while executing native code. This usually indicates
+a fatal error in the mono runtime or one of the native libraries
+used by your application.
+=================================================================
+
+Stacktrace:
+
+in (wrapper managed-to-native)
+System.Object:__icall_wrapper_compile_generic_met
+hod (object,intptr,intptr) &lt;0x4&gt;
+in (wrapper managed-to-native)
+System.Object:__icall_wrapper_compile_generic_met
+hod (object,intptr,intptr) &lt;0x8d&gt;
+in Test:Main () &lt;0x2d&gt;
+in (wrapper runtime-invoke) System.Object:runtime_invoke_void
+(object,intptr,int
+ptr,intptr) &lt;0x6df149e7&gt;
+
+Expected Results:
+
+NullReferenceException in managed area should happen.
+
+How often does this happen?
+
+consistently.
+
+Additional Information:
+
+This is a runtime problem (as the same code normally result in NRE in
+another runtime, and the same binary from another compiler result in the
+same on mono).
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