Possible incorrect usage of WeakReference.Target in method
FirebirdSql.Data.FirebirdClient.FbConnectionInternal.TransactionUpdated
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Key: DNET-619
URL: http://tracker.firebirdsql.org/browse/DNET-619
Project: .NET Data provider
Issue Type: Bug
Affects Versions: 4.6.4.0, 4.1.0.0
Environment: Windows 7 prof, sp1, CPU i5-3550, mem 8 GiB
Reporter: Alex Gaysinskiy
Assignee: Jiri Cincura
Implementation of
FirebirdSql.Data.FirebirdClient.FbConnectionInternal.TransactionUpdated
function (FirebirdClient\FbConnectionInternal.cs, line 298) has incorrect
condition:
public void TransactionUpdated()
{
for (int i = 0; i < this.preparedCommands.Count; i++)
{
if (!this.preparedCommands[i].IsAlive)
continue;
FbCommand command =
this.preparedCommands[i].Target as FbCommand; //<<<= may be a null
if (command.Transaction != null) //<<<=
potential NRE. Correct code is: command != null && command.Transaction != null
{
command.CloseReader();
command.Transaction = null;
}
}
}
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