[Mono-bugs] [Bug 720049] New: SqlDataReader throws exception on read/close

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https://bugzilla.novell.com/show_bug.cgi?id=720049

https://bugzilla.novell.com/show_bug.cgi?id=720049#c0


           Summary: SqlDataReader throws exception on read/close
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.10.x
          Platform: x86-64
        OS/Version: openSUSE 11.4
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: Sys.Data.SqlClient
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: ch3cooli at yahoo.com.hk
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:7.0) Gecko/20100101
Firefox/7.0

NullReferenceException throws
because encoder is null

  at Mono.Data.Tds.Protocol.TdsComm.GetString (Int32 len, Boolean wide,
System.Text.Encoding enc) [0x00070] in
/home/cnauser/mono/mono/mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/TdsComm.cs:568 
  at Mono.Data.Tds.Protocol.Tds.GetStringValue (Boolean wideChars, Int32 len,
System.Text.Encoding enc) [0x0003b] in
/home/cnauser/mono/mono/mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/Tds.cs:1289 
  at Mono.Data.Tds.Protocol.Tds.GetStringValue (Nullable`1 colType, Boolean
wideChars, Boolean outputParam, System.Text.Encoding encoder) [0x00108] in
/home/cnauser/mono/mono/mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/Tds.cs:1276 
  at Mono.Data.Tds.Protocol.Tds.GetColumnValue (Nullable`1 colType, Boolean
outParam, Int32 ordinal) [0x00258] in
/home/cnauser/mono/mono/mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/Tds.cs:807 
  at Mono.Data.Tds.Protocol.Tds.LoadRow () [0x00055] in
/home/cnauser/mono/mono/mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/Tds.cs:1396 
  at Mono.Data.Tds.Protocol.Tds.ProcessSubPacket () [0x001fd] in
/home/cnauser/mono/mono/mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/Tds.cs:1835 
  at Mono.Data.Tds.Protocol.Tds.NextResult () [0x0004a] in
/home/cnauser/mono/mono/mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/Tds.cs:619 
  at System.Data.SqlClient.SqlDataReader.NextResult () [0x0003b] in
/home/cnauser/mono/mono/mcs/class/System.Data/System.Data.SqlClient/SqlDataReader.cs:1503 
  at System.Data.SqlClient.SqlDataReader.Close () [0x00011] in
/home/cnauser/mono/mono/mcs/class/System.Data/System.Data.SqlClient/SqlDataReader.cs:215 
  at System.Data.Common.DbDataReader.Dispose (Boolean disposing) [0x00006] in
/home/cnauser/mono/mono/mcs/class/System.Data/System.Data.Common/DbDataReader.cs:85 
  at System.Data.Common.DbDataReader.Dispose () [0x00000] in
/home/cnauser/mono/mono/mcs/class/System.Data/System.Data.Common/DbDataReader.cs:79 
  at /home/cnauser/project1/project1.cs

Reproducible: Always

Steps to Reproduce:
1. create SqlCommand with sql text "select f1, f2, f3, f4 from t1" (not stored
procedure) and call ExecuteReader()
2. call reader.Read()
3. exception thrown, but Dispose() is found on the stack trace
Actual Results:  
NullReferenceException thrown

Expected Results:  
no exception

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