[Mono-bugs] [Bug 471259] New: NullReferenceException using Reflection with valid Nullable/ByRef arguments
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bugzilla_noreply at novell.com
Fri Jan 30 23:10:31 EST 2009
https://bugzilla.novell.com/show_bug.cgi?id=471259
Summary: NullReferenceException using Reflection with valid
Nullable/ByRef arguments
Classification: Mono
Product: Mono: Class Libraries
Version: 2.2.x
Platform: x86
OS/Version: openSUSE 11.0
Status: NEW
Severity: Normal
Priority: P5 - None
Component: CORLIB
AssignedTo: mono-bugs at lists.ximian.com
ReportedBy: joe at mistachkin.com
QAContact: mono-bugs at lists.ximian.com
Found By: ---
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.20)
Gecko/20081217 Firefox/2.0.0.20 (.NET CLR 3.5.30729)
The Eagle unit test object-7.1 causes Mono 2.0 to crash. For Mono 2.2, it
fails the unit test with a NullReferenceException. The test itself is designed
to exercise Reflection with Nullable and/or ByRef arguments. This test works
properly on .NET.
---- object-7.1 start
==== object-7.1 objects with array and nullable arguments FAILED
==== Contents of test case:
list [set x [object create Eagle._Tests.Default]] [llength [info objects]]
[set y 0] [object invoke $x TestByRefValueTypeMethod y] $y [object invoke $x
TestNullableValueTypeMethod $null] [object invoke $x
TestByRefNullableValueTypeMethod y] $y [object invoke $x
TestIntArrayReturnValue] [object invoke $x TestStringArrayReturnValue]
[object invoke $x TestStringListReturnValue] [object invoke $x
TestStringListArrayReturnValue] [set z(0) foo] [object invoke $x
TestByRefStringListArray z] [array get z] [unset z] [unset y] [object dispose
$x] [unset x] [llength [info objects]]
---- Test generated error; Return code was: Error
---- Return code should have been one of: Ok Return
---- errorInfo: System.NullReferenceException: Object reference not set to an
instance of an object
at Eagle._Components.Private.MarshalOps.FixupByRefArguments
(Eagle._Components.Public.Interpreter interpreter, System.Reflection.Binder
binder, System.Globalization.CultureInfo cultureInfo,
Eagle._Containers.Private.ArgumentInfoList argumentInfoList, System.Object[]
args, Eagle._Containers.Public.OptionDictionary options, Boolean create,
Boolean dispose, Boolean alias, Boolean toString,
Eagle._Components.Public.Result& error) [0x00000]
at Eagle._Commands.Object.Execute (Eagle._Components.Public.Interpreter
interpreter, IClientData clientData, Eagle._Containers.Public.ArgumentList
arguments, Eagle._Components.Public.Result& result) [0x00000]
while executing
"object invoke $x TestByRefNullableValueTypeMethod y"
invoked from within
"list [set x [object create Eagle._Tests.Default]] [llength [info objects]]
[set y 0] [object invoke $x TestByRefValueTypeMethod y] $y [object invoke..."
---- errorCode: NONE
==== object-7.1 FAILED
Reproducible: Always
Steps to Reproduce:
1. Download the "Mono-on-Unix" binaries distribution from: http://eagle.to/
2. Start the EagleShell.exe under the Mono of your choice (crash in 2.0 and
fail in 2.2)
3. Type "set argv [list -constraints monoCrash]" and hit enter.
4. Type "#test object7*" and hit enter to see the failure (complete with stack
trace).
Actual Results:
On Mono 2.0, the runtime crashes. On Mono 2.2 the unit test fails with a
NullReferenceException.
Expected Results:
The unit test should pass.
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