Intermittent C# Compiler failure

Question

Anyone seen the error below? I'm seeing this in a sub-project of a large build. It doesn;t always happen but it does seem to happen on the same component each time. I've not been able to get it to repeat reliably, ideas????

FWIW. It's a .NET Framework 4.8 Desktop project. C# coding from C#2 - C'# 7.3 are applied

 Unhandled Exception: System.AccessViolationException: Attempted to read or wri
    at Microsoft.Build.BackEnd.NativeMethods.CreateProcess(String lpApplication
    at Microsoft.Build.BackEnd.NodeLauncher.StartInternal(String msbuildLocatio
    at Microsoft.Build.BackEnd.NodeLauncher.<>c__DisplayClass3_0.<Star
    at Microsoft.Build.BackEnd.NodeLauncher.DisableMSBuildServer(Func`1 func)</
    at Microsoft.Build.BackEnd.NodeLauncher.Start(String msbuildLocation, Strin
    at Microsoft.Build.BackEnd.NodeProviderOutOfProcBase.&lt;&gt;c__DisplayClas
    at Microsoft.Build.BackEnd.NodeProviderOutOfProcBase.&lt;&gt;c__DisplayClas
    at System.Threading.Tasks.Parallel.&lt;&gt;c__DisplayClass17_0`1.&lt;ForWor
    at System.Threading.Tasks.Task.InnerInvoke()</message>
    at System.Threading.Tasks.Task.InnerInvokeWithArg(Task childTask)</message>
    at System.Threading.Tasks.Task.&lt;&gt;c__DisplayClass176_0.&lt;ExecuteSelf
    at System.Threading.Tasks.Task.InnerInvoke()</message>
    at System.Threading.Tasks.Task.Execute()</message>
    at System.Threading.Tasks.Task.ExecutionContextCallback(Object obj)</messag
    at System.Threading.ExecutionContext.RunInternal(ExecutionContext execution
    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext,
    at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task&amp; currentTask
    at System.Threading.Tasks.Task.ExecuteEntry(Boolean bPreventDoubleExecution
    at System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.Execute
    at System.Threading.ThreadPoolWorkQueue.Dispatch()</message>
    at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()</message>

Answer 1

Hi @Nabialek, Sam , Welcome to Microsoft Q&A,

This error message means that your .NET Framework 4.8 desktop project encountered a System.AccessViolationException exception during the build process. This exception is typically caused by an attempt to read or write protected memory. Make sure all third-party libraries and dependencies are up to date. Check if there are similar memory operations or multi-threaded operations in your code to ensure their safety:

// Example: Check memory access
IntPtr ptr = IntPtr.Zero;
try
{
    ptr = Marshal.AllocHGlobal(size);
    // Execute operation
}
catch (Exception ex)
{
    Console.WriteLine($"Exception: {ex.Message}");
}
finally
{
    if (ptr != IntPtr.Zero)
    {
        Marshal.FreeHGlobal(ptr);
    }
}

// Example: Thread synchronization
private static readonly object lockObject = new object();

void SafeMethod()
{
    lock (lockObject)
    {
        // Thread-safe operation
    }
}

Best Regards,

Jiale

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