SqlDataReader.GetStream(0).CopyToAsync hangs when CommandTimeout == 0 #1971

pacoteinnov · 2023-03-28T16:01:29Z

Describe the bug

SqlDataReader.GetStream(0).CopyToAsync hangs when CommandTimeout == 0 and transferring more than 7937 bytes.

To reproduce

static async Task Test(string connectionString, Guid fileId)
{
    await using SqlConnection connection = new();
    connection.ConnectionString = connectionString;
    await connection.OpenAsync();

    await using SqlCommand command = new("SELECT [filedata] FROM FileTable where id = @fileId", connection);
    command.Parameters.AddWithValue("fileId", fileId);

    await using SqlDataReader reader = await command.ExecuteReaderAsync(System.Data.CommandBehavior.SequentialAccess);

    command.CommandTimeout = 0;

    if (await reader.ReadAsync() && !(await reader.IsDBNullAsync(0)))
    {
        MemoryStream outputStream = new();
        await reader.GetStream(0).CopyToAsync(outputStream);
    }
}

The table with a FILESTREAM column but I guess it happens with a VARBINARY.

It does not hang if I change the CommandTimeout to int.MaxValue.

I can create a complete project if needed.

Expected behavior

No hangs when transferring data from a stream.

Further technical details

Microsoft.Data.SqlClient version: 5.1.0
.NET target: .NET 7
SQL Server version: SQL Server 2019
Operating system: Windows 10

lcheunglci · 2023-03-28T16:23:35Z

Hi @pacoteinnov, thanks for bringing this issue to our attention. When setting the CommandTimeout=0, it will wait indefinitely. However, it seems odd that it doesn't hang if you specified int.MaxValue or at least wait for a very long time before it times out. If you can provide a complete project that would be very help for us to investigate. Thanks!

lcheunglci · 2023-03-28T18:03:14Z

If you could also provide the stack trace or provide eventsource trace when it's hung, it would also be very helpful for us. Thanks!

pacoteinnov · 2023-03-28T18:55:24Z

All async logical stacks:
>	[Async] System.Private.CoreLib.dll!Task (int) [Promise]	C#
 	[Async] System.Private.CoreLib.dll!System.IO.Stream.CopyToAsync.__Core|27_0(System.IO.Stream, System.IO.Stream, int, System.Threading.CancellationToken) Line 108	C#
 	[Async] ReproIssue1971.dll!ReproIssue1971.Program.Repro(string, string, string, string) Line 58	C#
 	[Async] ReproIssue1971.dll!ReproIssue1971.Program.Main(string[]) Line 9	C#
 	ReproIssue1971.dll!ReproIssue1971.Program.<Main>(string[])	Unknown

>	[Async] Microsoft.Data.SqlClient.dll!Microsoft.Data.SqlClient.SqlSequentialStream.ReadAsync.AnonymousMethod__0(System.Threading.Tasks.Task<int>)	Unknown

pacoteinnov · 2023-03-28T18:55:38Z

All threads stacks:

Not Flagged		32900	1	Main Thread	Main Thread	System.Private.CoreLib.dll!System.Threading.ManualResetEventSlim.Wait
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.ManualResetEventSlim.Wait(int, System.Threading.CancellationToken) Line 575
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.Tasks.Task.SpinThenBlockingWait(int, System.Threading.CancellationToken) Line 3021
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.Tasks.Task.InternalWaitCore(int, System.Threading.CancellationToken) Line 2956
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) Line 145
 	 	 	 	 	 	[Waiting on Async Operation, double-click or press enter to view Async Call Stacks]
 	 	 	 	 	 	ReproIssue1971.dll!ReproIssue1971.Program.<Main>(string[])

Not Flagged		38296	4	Worker Thread	.NET Timer	System.Private.CoreLib.dll!System.Threading.WaitHandle.WaitOneNoCheck
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.WaitHandle.WaitOneNoCheck(int) Line 139
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.TimerQueue.TimerThread() Line 94

Not Flagged		35060	6	Worker Thread	.NET ThreadPool Worker	System.Private.CoreLib.dll!Interop.Kernel32.GetQueuedCompletionStatus
 	 	 	 	 	 	[Managed to Native Transition]
 	 	 	 	 	 	System.Private.CoreLib.dll!Interop.Kernel32.GetQueuedCompletionStatus(nint, out uint, out nuint, out nint, int) Line 4871
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.LowLevelLifoSemaphore.WaitForSignal(int) Line 204
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.LowLevelLifoSemaphore.Wait(int, bool) Line 124
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart() Line 71

Not Flagged		4200	7	Worker Thread	.NET ThreadPool Gate	System.Private.CoreLib.dll!System.Threading.WaitHandle.WaitOneNoCheck
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.WaitHandle.WaitOneNoCheck(int) Line 139
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.PortableThreadPool.GateThread.GateThreadStart() Line 49

Not Flagged		52324	8	Worker Thread	.NET ThreadPool Worker	System.Private.CoreLib.dll!Interop.Kernel32.GetQueuedCompletionStatus
 	 	 	 	 	 	[Managed to Native Transition]
 	 	 	 	 	 	System.Private.CoreLib.dll!Interop.Kernel32.GetQueuedCompletionStatus(nint, out uint, out nuint, out nint, int) Line 4871
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.LowLevelLifoSemaphore.WaitForSignal(int) Line 204
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.LowLevelLifoSemaphore.Wait(int, bool) Line 124
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart() Line 71

Not Flagged	>	7076	10	Worker Thread	.NET ThreadPool Worker	System.Private.CoreLib.dll!Interop.Kernel32.GetQueuedCompletionStatus
 	 	 	 	 	 	[Managed to Native Transition]
 	 	 	 	 	 	System.Private.CoreLib.dll!Interop.Kernel32.GetQueuedCompletionStatus(nint, out uint, out nuint, out nint, int) Line 4871
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.LowLevelLifoSemaphore.WaitForSignal(int) Line 204
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.LowLevelLifoSemaphore.Wait(int, bool) Line 124
 	 	 	 	 	 	System.Private.CoreLib.dll!System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart() Line 71

pacoteinnov · 2023-03-28T18:57:10Z

Event source:

<prov.DbConnectionHelper.ConnectionString_Set|API> 1, 'Data Source=localhost;Initial Catalog="redacted";User ID=redacted;Encrypt=False'
<sc.SqlConfigurableRetryLogicManager.ConnectionProvider|INFO> Requested the ConnectionProvider value.
<sc.AppConfigManager.FetchConfigurationSection|INFO>: Unable to load custom `SqlConfigurableRetryLogicConnection`. Default value of `T` type returns.
<sc.AppConfigManager.FetchConfigurationSection|INFO>: Unable to load custom `SqlConfigurableRetryLogicCommand`. Default value of `T` type returns.
SqlConnection.OpenAsyncRetry | Info | Object Id 1
<sc|SqlAuthenticationProviderManager|Ctor|Info>Neither SqlClientAuthenticationProviders nor SqlAuthenticationProviders configuration section found.
TdsParserStateObjectFactory.CreateTdsParserStateObject | Info | AppContext switch 'Switch.Microsoft.Data.SqlClient.UseManagedNetworkingOnWindows' not enabled, native networking implementation will be used.
TdsParser.Connect | SEC | Connection Object Id 4, Authentication Mode: SqlPassword
<sc.TdsParser.Connect|SEC> Sending prelogin handshake
<sc.TdsParser.SendPreLoginHandshake|INFO> ClientConnectionID 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, ActivityID cdc53ee5-7df0-4a05-9a4f-8f0caa4704da:1
<sc.TdsParser.Connect|SEC> Consuming prelogin handshake
<sc.TdsParser.Connect|SEC> Prelogin handshake successful
<sc.TdsParser.TryRun|SEC> Received login acknowledgement token
<sc.AppConfigManager.FetchConfigurationSection|INFO>: Unable to load custom `AppContextSwitchOverrides`. Default value of `T` type returns.
<sc.SqlAppContextSwitchManager.ApplyContextSwitches|INFO> Entry point.
<sc.SqlAppContextSwitchManager.ApplyContextSwitches|INFO> Exit point.
<sc|ActiveDirectoryAuthenticationTimeoutRetryHelper|SetState|Info>State changed from NotStarted to HasLoggedIn.
<prov.DbConnectionFactory.CreatePooledConnection|RES|CPOOL> 1, Pooled database connection created.
SqlConnection.Retry | Info | Object Id 1
SqlCommand.Set_CommandText | API | Object Id 1, String Value = 'null', Client Connection Id null
SqlCommand.Set_Connection | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308
SqlCommand.Set_CommandText | API | Object Id 1, String Value = 'IF OBJECT_ID('TableWithBinaryData', 'U') IS NOT NULL DROP TABLE TableWithBinaryData', Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308
<sc.SqlConfigurableRetryLogicManager.CommandProvider|INFO> Requested the CommandProvider value.
SqlCommand.InternalExecuteNonQuery | INFO | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, AsyncCommandInProgress=False
SqlCommand.InternalExecuteNonQuery | INFO | Object Id 1, RPC execute method name BeginExecuteNonQuery, isAsync True, inRetry False
SqlCommand.RunExecuteNonQueryTds | Info | Object Id 1, Activity Id 81d8ae6a-73a5-4d7e-aa0c-15af6aa3dab2:1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, Command executed as SQLBATCH, Command Text 'IF OBJECT_ID('TableWithBinaryData', 'U') IS NOT NULL DROP TABLE TableWithBinaryData'
SqlCommand.SetActiveConnectionAndResult | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False
TdsParserStateObject.ReadAsyncCallback | Info | State Object Id 1, received error 0 on idle connection
SqlCommand.InternalEndExecuteNonQuery | INFO | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False, AsyncCommandInProgress=True
SqlCommand.VerifyEndExecuteState | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False, AsyncCommandInProgress=True
TdsParserStateObject.DecrementOpenResultCount | INFO | State Object Id 1, Processing Attention.
CachedAsyncState.ResetAsyncState | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, AsyncCommandInProgress=True
CachedAsyncState.ResetAsyncState | API | ObjectId null, Client Connection Id null, AsyncCommandInProgress=null
SqlCommand.Set_CommandText | API | Object Id 2, String Value = 'null', Client Connection Id null
SqlCommand.Set_Connection | API | ObjectId 2, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308
SqlCommand.Set_CommandText | API | Object Id 2, String Value = 'CREATE TABLE TableWithBinaryData (id int, bindata VARBINARY(MAX))', Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308
<sc.SqlConfigurableRetryLogicManager.CommandProvider|INFO> Requested the CommandProvider value.
SqlCommand.InternalExecuteNonQuery | INFO | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, AsyncCommandInProgress=False
SqlCommand.InternalExecuteNonQuery | INFO | Object Id 2, RPC execute method name BeginExecuteNonQuery, isAsync True, inRetry False
SqlCommand.RunExecuteNonQueryTds | Info | Object Id 2, Activity Id b3efb635-3f63-4b33-b2e0-7ea9aef999a2:1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, Command executed as SQLBATCH, Command Text 'CREATE TABLE TableWithBinaryData (id int, bindata VARBINARY(MAX))'
SqlCommand.SetActiveConnectionAndResult | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False
TdsParserStateObject.ReadAsyncCallback | Info | State Object Id 1, received error 0 on idle connection
SqlCommand.InternalEndExecuteNonQuery | INFO | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False, AsyncCommandInProgress=True
SqlCommand.VerifyEndExecuteState | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False, AsyncCommandInProgress=True
TdsParserStateObject.DecrementOpenResultCount | INFO | State Object Id 1, Processing Attention.
CachedAsyncState.ResetAsyncState | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, AsyncCommandInProgress=True
CachedAsyncState.ResetAsyncState | API | ObjectId null, Client Connection Id null, AsyncCommandInProgress=null
SqlCommand.Set_CommandText | API | Object Id 3, String Value = 'null', Client Connection Id null
SqlCommand.Set_Connection | API | ObjectId 3, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308
SqlCommand.Set_CommandText | API | Object Id 3, String Value = 'INSERT INTO TableWithBinaryData (id, bindata) VALUES (1, @bindata)', Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308
<sc.SqlConfigurableRetryLogicManager.CommandProvider|INFO> Requested the CommandProvider value.
SqlCommand.InternalExecuteNonQuery | INFO | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, AsyncCommandInProgress=False
SqlCommand.InternalExecuteNonQuery | INFO | Object Id 3, RPC execute method name BeginExecuteNonQuery, isAsync True, inRetry False
SqlCommand.SetActiveConnectionAndResult | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False
TdsParserStateObject.ReadAsyncCallback | Info | State Object Id 1, received error 0 on idle connection
SqlCommand.InternalEndExecuteNonQuery | INFO | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False, AsyncCommandInProgress=True
SqlCommand.VerifyEndExecuteState | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False, AsyncCommandInProgress=True
TdsParserStateObject.DecrementOpenResultCount | INFO | State Object Id 1, Processing Attention.
CachedAsyncState.ResetAsyncState | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, AsyncCommandInProgress=True
CachedAsyncState.ResetAsyncState | API | ObjectId null, Client Connection Id null, AsyncCommandInProgress=null
SqlCommand.Set_CommandText | API | Object Id 4, String Value = 'null', Client Connection Id null
SqlCommand.Set_Connection | API | ObjectId 4, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308
SqlCommand.Set_CommandText | API | Object Id 4, String Value = 'SELECT bindata FROM TableWithBinaryData WHERE id = @id', Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308
<sc.SqlConfigurableRetryLogicManager.CommandProvider|INFO> Requested the CommandProvider value.
SqlCommand.InternalExecuteReaderAsync | API> 4, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, Command Text = 'SELECT bindata FROM TableWithBinaryData WHERE id = @id'
SqlCommand.RunExecuteReaderTds | Info | Object Id 4, Activity Id b3efb635-3f63-4b33-b2e0-7ea9aef999a2:1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, Command executed as RPC, RPC Name 'sp_executesql'
SqlCommand.SetActiveConnectionAndResult | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False
TdsParserStateObject.ReadAsyncCallback | Info | State Object Id 1, received error 0 on idle connection
SqlCommand.EndExecuteReaderInternal | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False, AsyncCommandInProgress=True
SqlCommand.InternalEndExecuteReader | INFO | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False, AsyncCommandInProgress=True
SqlCommand.VerifyEndExecuteState | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, MARS=False, AsyncCommandInProgress=True
CachedAsyncState.ResetAsyncState | API | ObjectId 1, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308, AsyncCommandInProgress=True
SqlCommand.Set_CommandTimeout | API | ObjectId 4, Command Timeout value 0, Client Connection Id 1b0d7aa3-2390-4d78-9ba9-283c8ef53308
TdsParserStateObject.ReadAsyncCallback | Info | State Object Id 1, received error 0 on idle connection

pacoteinnov · 2023-03-28T19:03:13Z

The project: https://github.com/pacoteinnov/ReproIssue1917

pacoteinnov · 2023-03-28T19:04:51Z

I have these two exceptions (that are not present without the CommandTimeout=0):


System.NullReferenceException
  HResult=0x80004003
  Message=Object reference not set to an instance of an object.
  Source=Microsoft.Data.SqlClient
  StackTrace:
   at Microsoft.Data.SqlClient.SqlDataReader.SqlDataReaderAsyncCallContext`2.DisposeCore()

System.NullReferenceException
  HResult=0x80004003
  Message=Object reference not set to an instance of an object.
  Source=Microsoft.Data.SqlClient
  StackTrace:
   at Microsoft.Data.SqlClient.SqlDataReader.SqlDataReaderAsyncCallContext`2.DisposeCore()
   at Microsoft.Data.SqlClient.AAsyncBaseCallContext`2.ClearCore()
   at Microsoft.Data.SqlClient.AAsyncBaseCallContext`2.Dispose()
   at Microsoft.Data.SqlClient.SqlDataReader.CompleteAsyncCall[T](Task`1 task, SqlDataReaderBaseAsyncCallContext`1 context)
   at Microsoft.Data.SqlClient.SqlDataReader.SqlDataReaderBaseAsyncCallContext`1.CompleteAsyncCallCallback(Task`1 task, Object state)
   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in /_/src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 268
--- End of stack trace from previous location ---

  This exception was originally thrown at this call stack:
    Microsoft.Data.SqlClient.SqlDataReader.SqlDataReaderAsyncCallContext<T, TDisposable>.DisposeCore()
    Microsoft.Data.SqlClient.AAsyncBaseCallContext<TOwner, TTask>.ClearCore()
    Microsoft.Data.SqlClient.AAsyncBaseCallContext<TOwner, TTask>.Dispose()
    Microsoft.Data.SqlClient.SqlDataReader.CompleteAsyncCall<T>(System.Threading.Tasks.Task<T>, Microsoft.Data.SqlClient.SqlDataReader.SqlDataReaderBaseAsyncCallContext<T>)
    Microsoft.Data.SqlClient.SqlDataReader.SqlDataReaderBaseAsyncCallContext<T>.CompleteAsyncCallCallback(System.Threading.Tasks.Task<T>, object)
    System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(System.Threading.Thread, System.Threading.ExecutionContext, System.Threading.ContextCallback, object) in ExecutionContext.cs

ErikEJ · 2023-03-28T19:11:33Z

See #1903 - fixed in 5.1.1

lcheunglci · 2023-03-28T19:43:25Z

Thanks @ErikEJ for spotting that. The v5.1.1 release should be out later today.

lcheunglci · 2023-03-28T22:50:31Z

Please try out the new v5.1.1 release and let us know or close the issue if this resolves your issue. Thanks!

pacoteinnov · 2023-03-29T13:28:59Z

Please try out the new v5.1.1 release and let us know or close the issue if this resolves your issue. Thanks!

I confirm that the 5.1.1 release fixes the problems. Thanks!

lcheunglci added the 🆕 Triage Needed For new issues, not triaged yet. label Mar 28, 2023

lcheunglci added ℹ️ Needs more Info Issues that have insufficient information to pursue investigations and removed 🆕 Triage Needed For new issues, not triaged yet. labels Mar 28, 2023

lcheunglci removed the ℹ️ Needs more Info Issues that have insufficient information to pursue investigations label Mar 28, 2023

pacoteinnov closed this as completed Mar 29, 2023

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SqlDataReader.GetStream(0).CopyToAsync hangs when CommandTimeout == 0 #1971

SqlDataReader.GetStream(0).CopyToAsync hangs when CommandTimeout == 0 #1971

pacoteinnov commented Mar 28, 2023

lcheunglci commented Mar 28, 2023

lcheunglci commented Mar 28, 2023 •

edited

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pacoteinnov commented Mar 28, 2023

pacoteinnov commented Mar 28, 2023

pacoteinnov commented Mar 28, 2023

pacoteinnov commented Mar 28, 2023

pacoteinnov commented Mar 28, 2023

ErikEJ commented Mar 28, 2023

lcheunglci commented Mar 28, 2023

lcheunglci commented Mar 28, 2023

pacoteinnov commented Mar 29, 2023

SqlDataReader.GetStream(0).CopyToAsync hangs when CommandTimeout == 0 #1971

SqlDataReader.GetStream(0).CopyToAsync hangs when CommandTimeout == 0 #1971

Comments

pacoteinnov commented Mar 28, 2023

Describe the bug

To reproduce

Expected behavior

Further technical details

lcheunglci commented Mar 28, 2023

lcheunglci commented Mar 28, 2023 • edited Loading

pacoteinnov commented Mar 28, 2023

pacoteinnov commented Mar 28, 2023

pacoteinnov commented Mar 28, 2023

pacoteinnov commented Mar 28, 2023

pacoteinnov commented Mar 28, 2023

ErikEJ commented Mar 28, 2023

lcheunglci commented Mar 28, 2023

lcheunglci commented Mar 28, 2023

pacoteinnov commented Mar 29, 2023

lcheunglci commented Mar 28, 2023 •

edited

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