Silent crash in CS console app

[landogarner7]

Operating System

Windows

Programming Languages

No response

CCXT Version

4.3.6

Description

I had created a C# WinForms testapp that has put Binance fetchMarkets and fetchOHLCV Information into a DB - nothing special. As I did not really require any UI I have moved the logic to a Windows Console App and found the very strange behaviour that both calls - fetchMarkets and fetchOHLCV - crash the app without any Exception, Error Message or anything.

The exchange was setup like this :

ccxtEx = new ccxt.Binance(); ccxtEx.apiKey = BINANCE_API_KEY; ccxtEx.secret = BINANCE_API_SECRET; ccxtEx.enableRateLimit = true; ccxtEx.options["paginate"] = true; ccxtEx.options["adjustForTimeDifference"] = true; ccxtEx.options["recvWindow"] = 60000; ccxtEx.verbose = true;

The function calls are simply

List<MarketInterface> markets = await exchange.FetchMarkets(); (inside a public virtual async Task<bool> function)
and
List<OHLCV> ohlcv = await exchange.FetchOHLCV(symbol, period, maxDButc); (inside a public virtual async Task<bool> function)

I can follow the debug in FetchMarkets() until below code in binance.cs :

It iterated until value3 = inverse, then exits the while AND binance.cs, closes the task and then the application.

Any idea what went wrong ?

Code

while (Exchange.isLessThan(a2, Exchange.getArrayLength(fetchMarkets)))
{
	object value3 = getValue(fetchMarkets, a2);
	if (Exchange.isTrue(Exchange.isEqual(value3, "spot")))
	{
		((IList<object>)obj).Add(publicGetExchangeInfo(parameters));
	}
	else if (Exchange.isTrue(Exchange.isEqual(value3, "linear")))
	{
		((IList<object>)obj).Add(fapiPublicGetExchangeInfo(parameters));
	}
	else if (Exchange.isTrue(Exchange.isEqual(value3, "inverse")))
	{
		((IList<object>)obj).Add(dapiPublicGetExchangeInfo(parameters));
	}
	else
	{
		if (!Exchange.isTrue(Exchange.isEqual(value3, "option")))
		{
			throw new ExchangeError(Exchange.add(Exchange.add(Exchange.add(base.id, " fetchMarkets() this.options fetchMarkets \""), value3), "\" is not a supported market type"));
		}
		((IList<object>)obj).Add(eapiPublicGetExchangeInfo(parameters));
	}
	Exchange.postFixIncrement(ref a2);
}

[carlosmiei]

Hello @landogarner7, yes that is very weird and I can't reproduce it locally but I'm not running windows/netframework.

Is it possible to post a small self-contained project that we can compile and run locally to see if we can emulate that behavior ?

[landogarner7]

Hi Carlos, that was fast - thank you.
I might send you (rather than post) the full Visual Studio project if that is useful for you - but it is under Windows 10.

[ttodua]

yes please send the project .zip if you can. thanks

[landogarner7]

ccxt2DB.zip

[ttodua]

i am not able to reproduce it.
I get Exception thrown: 'System.Data.SqlClient.SqlException' in System.Data.dll. have you tried to remove the logic of sql/database from demo project and just summarize only the code that would expose the bug (without need of sql/db manipulations)? it would help us to see the issue(if there is) right away

[landogarner7]

I have eliminated all DB logic, please try again

ccxtSample.zip

[ttodua]

I was able to reproduce the issue, thanks for the response.
I'll post an update soon

[landogarner7]

It looks as if 4.3.8 does not solve the issue, will there be another update?

[carlosmiei]

@landogarner7 We weren't able to trace down the issue yet but as soon as we do we will link the PR to this issue so you can follow it

[landogarner7]

No intention to push, take your time. Your assistance is highly appreciated, thank you !!