Hi,

While playing with conditional waits, SBCL complains about an assertion pasted below. I don't know if it's an expected behaviour or not. Any ideas?

Regards.

(asdf:oos 'asdf:load-op 'bordeaux-threads)

(defpackage :btt (:use :cl))

(in-package :btt)

(defun thread-body (stream cond-var lock-var) (format stream "WAITING... (~S)~%" (bt:current-thread)) (bt:condition-wait cond-var lock-var) (format stream "NOTIFIED! (~S)~%" (bt:current-thread)))

(defun test-condition-variables (n-threads) (let* ((cond-var (bt:make-condition-variable)) (lock-var (bt:make-lock)) (stream *trace-output*) (threads (loop repeat n-threads collect (bt:make-thread (lambda () (thread-body stream cond-var lock-var)))))) (sleep 10.0) ; The assertion (EQ SB-THREAD::ME ; (SB-THREAD::MUTEX-%OWNER SB-THREAD:MUTEX)) failed. ; [Condition of type SIMPLE-ERROR] ; ; Restarts: ; 0: [CONTINUE] Retry assertion. ; 1: [TERMINATE-THREAD] Terminate this thread (#<THREAD "Anonymous" RUNNING {10027AAE21}>) ; ; Backtrace: ; 0: (SB-KERNEL:ASSERT-ERROR (EQ SB-THREAD::ME (SB-THREAD::MUTEX-%OWNER SB-THREAD:MUTEX)) NIL NIL)[:EXTERNAL] ; 1: (SB-THREAD:CONDITION-WAIT #S(SB-THREAD:WAITQUEUE :NAME NIL :DATA NIL) #S(SB-THREAD:MUTEX :NAME NIL :%OWNER NIL :STATE 0)) ; 2: (SB-THREAD:CONDITION-WAIT #S(SB-THREAD:WAITQUEUE :NAME NIL :DATA NIL) #S(SB-THREAD:MUTEX :NAME NIL :%OWNER NIL :STATE 0))[:EXTERNAL] ; 3: (BTT::THREAD-BODY #<SWANK-BACKEND::SLIME-OUTPUT-STREAM {1002ACA601}> #S(SB-THREAD:WAITQUEUE :NAME NIL :DATA NIL) #S(SB-THREAD:MUTEX :NAME NIL :%OWNER NIL :STATE 0)) ; 4: ((LAMBDA ())) ; 5: ((FLET SB-THREAD::WITH-MUTEX-THUNK)) ; 6: ((FLET #:WITHOUT-INTERRUPTS-BODY-[CALL-WITH-MUTEX]478)) ; 7: (SB-THREAD::CALL-WITH-MUTEX ..) ; 8: ((LAMBDA ())) ; 9: ("foreign function: #x41F1B2") ; 10: ("foreign function: #x4165CA") ; --more-- (format stream "Notifying...~%") (bt:condition-notify cond-var) (dolist (thread threads) (format stream "~:[Active Thread: ~S~;Inactive Thread: ~S~]~%" (bt:thread-alive-p thread) thread) (when (bt:thread-alive-p thread) (bt:destroy-thread thread))) (format stream "Exiting...~%")))