From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Linas Vepstas Newsgroups: gmane.lisp.guile.bugs Subject: bug#25386: guile-2.0 and 2.2 thread leakage+crash; very simple test attached. 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Sat, 07 Jan 2017 16:48:16 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cPyqT-0006Ru-UD for bug-guile@gnu.org; Sat, 07 Jan 2017 16:48:15 -0500 Original-Received: from mail-qk0-x235.google.com ([2607:f8b0:400d:c09::235]:33795) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cPyqT-0006Ri-Q3 for bug-guile@gnu.org; Sat, 07 Jan 2017 16:48:13 -0500 Original-Received: by mail-qk0-x235.google.com with SMTP id a20so108601335qkc.1 for ; Sat, 07 Jan 2017 13:48:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:reply-to:from:date:message-id:subject:to; bh=XQs5ZPfQwMUZSRTpExWR9Wn+AP27trjTf+kp5Wc0k4Y=; b=TjtCrLpKdtupNwaKXI6SYOwmZfDr0g1yS5Mh5IXKxEG2Rcjso1zT5iHc5Qyg8qR+7V l+FwRFuxPhjfNYarW2sE37odCkJCEIGTi6DQ+pcX/DrIrRbTBOsJ4mIcyYBna8ojY6Mw CLZTaIflfIjmU2NqBhrRWEgs9fVHYdEl3p1OY9fzzI8Vy4djrz36IzDJIjdIPfN52vSl DKIPaG6HsexW/pFGisXqdUDOjTh7HQPDbVasFBzr84ODbaiAhr7C0M87Y+HTT1c4xFHG GABNFm4GHXNsnIPkr8/kU83gsowJqGXcX1sGg/96UwUCPH2xFjOgWymR73W8BcY5+tD0 BCNA== X-Google-DKIM-Signature: v=1; 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Last thing printed before crash: rate=194.80519560944032 num threads=2 ((gc-time-taken . 2791348254) (heap-size . 7532883968) (heap-free-size . 2449408) (heap-total-allocated . 23912882640) (heap-allocated-since-gc . 1073995264) (protected-objects . 90) (gc-times . 87)) Too many heap sections: Increase MAXHINCR or MAX_HEAP_SECTS Aborted Similar issue in guile-2.2 except it takes longer (8 minutes) and crashes in gc somewhere. I assume that some sort of continuation is left lying about, even though the thread has exited. (define junk 0) (define halt #f) (define (wtf-thr) (define start (- (current-time) 0.1)) ; Create thread that does junk and exits. Yes, the increment ; of `junk` is not protected, and its racey, but so what. (define (mkthr v) (call-with-new-thread (lambda () (set! junk (+ junk 1))))) ; thread arguments (define thrarg (make-list 10 0)) (define cnt 0) (define (mke) ; Create a limited number of threads (define thr-list (map mkthr thrarg)) ; (display (length (all-threads))) (map join-thread thr-list) ; Some handy debug printing. (set! cnt (+ cnt 1)) (if (eq? 0 (modulo cnt 500)) (begin (display "rate=") (display (/ cnt (- (current-time) start))) (newline) (display "num threads=") (display (length (all-threads))) (newline) (display (gc-stats)) (newline) (newline) ))) ; tail recursive infinite loop. (define (aloop) (mke) (if (not halt) (aloop))) ; while forever. (aloop) ) ; Run elsewhere, so that we have a shell prompt ; (not required for the bug) (call-with-new-thread wtf-thr) ; halt if desired. ; (set! halt #t)