Check for EXIT_SUCCESS after calling ReadFile().

child.cpp

       // Blocking read from the child.
 #ifdef _WIN32
 
-      DWORD nBytesRead;
+      DWORD nBytesRead, lastError;
 
       try {
 
 
 	  // Broken pipe occurs when the child exits; this is not
 	  // necessarily an error condition.
-	  if (GetLastError() != ERROR_BROKEN_PIPE) {
+	  lastError = GetLastError();
+	  if ( (ERROR_BROKEN_PIPE != lastError) &&
+	       (ERROR_SUCCESS != lastError) ){
 
 	    errorText = "Error reading from the child process:  ";
 	    errorText += getErrorText();
 	// Thread was not commanded to stop; output error: Broken pipe
 	// occurs when the child exits; this is not an error
 	// condition.
-	if (GetLastError() != ERROR_BROKEN_PIPE) {
+	lastError = GetLastError();
+	if ( (ERROR_BROKEN_PIPE != lastError) &&
+	     (ERROR_SUCCESS != lastError) ){
 
-	  errorText = "Error reading from the child process:  ";
+	  errorText = "Exception when reading from the child process:  ";
 	  errorText += getErrorText();
 
 	}