Tim,

I am seeing several indications of an unstable system:

1) Compiler Segmentation Fault errors
2) Serial port output not being written
3) Repeated nagging from Visual Studio that VM plugin is causing problems.

First, here are the errors I am now seeing quite often:
Severity      Code      Description      File      Line
Warning            compilation terminated            
Error            error: ld returned 1 exit status      collect2.exe      
Error            error: lto-wrapper failed      d:\arduino\hardware\tools\avr\avr\bin\ld.exe      -1
Error            fatal error: D:\Arduino\hardware\tools\avr\bin\avr-gcc returned 1 exit status      lto-wrapper.exe      
Warning            Please submit a full bug report            
Warning            with preprocessed source if appropriate            
Warning            In member function showHelp      D:\Documents\Arduino\libraries\NanoBots\src\BJDriverRF24.h      -1
Warning            internal compiler error  Segmentation fault      D:\Documents\Arduino\libraries\NanoBots\src\BJDriverRF24.h      295
Warning            gcc.gnu.org\bugs.html> for instructions      See <http      

Verbose compiler output is attached.

These errors often go away if I do a Build->Clean, but sometimes even that doesn't fix them. 

Second Symptom:
In some cases, no output is being written to the Serial Port. If I chop out pieces of code or simply issue a RETURN statement at the beginning of a large switch statement, output IS displayed. If I add code back in, the display disappears. What is especially weird is that lots of the serial output happens during setup. The code being selectively disabled is in the loop. So somehow, while still generating setup output, it figures out that something is going to happen in the future so it discards the output. 

To make matters worse, the automatically generated port logs reflect the non-output. Here is the entire content of COM29 2018-11-28 11-19-36.conversation.txt:

2018-11-28 11:19:37      Message      Opening port
Port open


And here is the setup function, clearly showing Serial.print statements that are all being discarded:

void setup () {
     Serial.begin ( 115200 );
     Serial.println ( F ( "SETUP BEGINS" ) );
     delay ( SERIAL_DELAY * 10 );
     master = new BJMaster ();
     Serial.println ( F ( "MASTER CREATED" ) );
     delay ( SERIAL_DELAY * 10 );

     master->init ();
     Serial.println ( F ( "SETUP COMPLETE" ) );
     delay ( SERIAL_DELAY * 10);
}

The third syndrome shows up as a warning that VM is causing severe delays. It asks if I want to disable the plugin and gives a "Never show this reminder again" option. I click on that option and learn pretty soon that "never" is quite subjective, as VS asks the same question again.

I know this is a strange conglomeration of issues, but I am wondering if you have any hunches about what may be causing the problems? Are they connected or unrelated?

In my mind, the most significant is the missing Serial Output. Without that output, I cannot debug. 

The Compiler faults are becoming increasingly annoying but I usually find a way around them. 

The final problem is one you may want to report to Microsoft and ask them, "Does never really mean never?"

Thanks,

Bob