[plt-scheme] hitting a race in logging?

From: Danny Yoo (dyoo at cs.wpi.edu)
Date: Sun Aug 10 15:05:03 EDT 2008

I'm hitting slightly weird behavior when I'm logging events, but I
don't yet see why.  In DrScheme, the following program sometimes shows
"hello" as expected.  But sometimes it doesn't!


#lang scheme

(define (start-up-debug-printing)
  (let ([receiver (make-log-receiver (current-logger) 'debug)])
     (thread (lambda ()
               (let loop ()
                 (let ([v (sync receiver)])
                   (display (vector-ref v 1))

(log-warning "hello")

If I press Run three times, the third time does not show output.  Am I
using the logging system properly?

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