Full CLI string is:
"freeglut (foo): ERROR: Function <glutSwapBuffers> called with no current window defined."
There's only *one* google search result for this and the problem described there is different than what I'm getting.
There he's only getting the error on a program close.. I'm getting it during execution.
Specifically, on the second iteration of the glutDisplayFunc registered function.
I have glutSwapBuffers at the bottom of that function, and it appears as if this window "getting lost" has nothing to do with any of my code but something internal to the glutMainLoop.