w3wp.exe halted with unhandled exception after reboot

### Describe the bug
After starting my machine, all w3wp.exe processes for my ASP.NET Core applications were terminated due to an unhandled exception.

### To Reproduce
I did not reproduce it yet, but I could attach a debugger to one of the w3wp.exe processes and isolate the following info:

```c++

// in AspNetCoreModuleV2\InProcessRequestHandler\inprocessapplication.cpp, line 190:

void IN_PROCESS_APPLICATION::ExecuteApplication()
{
// ...
// Line 274:

bool clrThreadExited;
{
auto redirectionOutput = LoggingHelpers::CreateOutputs(
m_pConfig->QueryStdoutLogEnabled(),
m_pConfig->QueryStdoutLogFile(),
QueryApplicationPhysicalPath(),
m_stringRedirectionOutput
);
// ...
// Exception thrown at the end of this scope, when destructor of redirectionOutput
// calls d'tor of FileRedirectionOutput for stdout.log
}

// There, in AspNetCoreModuleV2\CommonLib\RedirectionOutput.cpp, line 85:

FileRedirectionOutput::~FileRedirectionOutput()
{
if (m_file.is_open())
{
// closing the stream attempts to clear the state
m_file.close();
//...


// then, in include\xiosbase, line 247:

void __CLR_OR_THIS_CALL clear(iostate _State, bool _Reraise) { // set state, possibly reraise exception
_State &= _Statmask;
_Mystate = _State;
const auto _Filtered = _State & _Except;
if (_Filtered) {
if (_Reraise) {
_RERAISE;
}

const char* _Msg;
if (_Filtered & ios_base::badbit) {
_Msg = "ios_base::badbit set";
} else if (_Filtered & ios_base::failbit) {
_Msg = "ios_base::failbit set";
} else {
_Msg = "ios_base::eofbit set";
}

_THROW(failure(_Msg));



// The _Msg thrown is "ios_base::failbit set";
```

The FileRedirectionOutput refers to the stdout log of **yesterday**, aspnetcore-stdout_20200817161241_724.log. This file was created, modified and accessed last time yesterday, ‎August ‎17, ‎2020, ‏‎6:12:42 PM. In the meantime, the machine has been shut down and today restarted.

### Exceptions (if any)
Unhandled exception at 0x00007FFA820BDB9E (ucrtbase.dll) in w3wp.exe: Fatal program exit requested.

### Further technical details
- ASP.NET Core version

TargetFramework netcoreapp3.1
Microsoft.AspNetCore FileVersion 3.100.320.12812

- Include the output of `dotnet --info`

```
.NET Core SDK (reflecting any global.json):
Version: 3.1.401
Commit: 5b6f5e5005

Runtime Environment:
OS Name: Windows
OS Version: 10.0.18363
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\3.1.401\

Host (useful for support):
Version: 3.1.7
Commit: fcfdef8d6b

.NET Core SDKs installed:
3.1.107 [C:\Program Files\dotnet\sdk]
3.1.401 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.21 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.21 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.21 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download
```

- The IDE (VS / VS Code/ VS4Mac) you're running on, and it's version
VS2019 Version 16.7.1