[Openmcl-devel] Bug when writing to broken pipe?

[Andreas Thiele]

Dear All,

 

I came across a tiny problem which I would consider a bug: I write a lengthy
output to *standard-output* on a Debian Linux. When I pipe the output to
another linux program and the pipe get broken, closure lisp crashes. Is this
behavior correct? If so, how can I avoid the crash.

 

In my case I pipe to linux less and terminate less by pressed letter q very
soon.

 

My test code is:

 

(defun test ()

  (loop :for i :from 1 :to 10000 :do

     (format t "This is a test line to produce a lengthy output.~%")))

 

(ccl:save-application "test" 

                                     :toplevel-function #'test

                                     :error-handler :quit

                                     :prepend-kernel t)

 

Tested with ccl-1.9 32 and 64 and ccl-1.10 32-bit.

 

fwgz at fwgz14:~/cvsrep-bug$test | less

 

and pressing 'q' very soon leads to

 

> While executing: #<CCL::STANDARD-KERNEL-METHOD CCL::STREAM-IO-ERROR
(STREAM T T)>, in process toplevel(2).

> Error: on #<BASIC-CHARACTER-OUTPUT-STREAM UTF-8 (PIPE/1) #x18353C96> :

>        Broken pipe during write

> While executing: #<CCL::STANDARD-KERNEL-METHOD CCL::STREAM-IO-ERROR
(STREAM T T)>, in process toplevel(2).

> Error: on #<BASIC-CHARACTER-OUTPUT-STREAM UTF-8 (PIPE/1) #x18353C96> :

>        Broken pipe during write

> While executing: #<CCL::STANDARD-KERNEL-METHOD CCL::STREAM-IO-ERROR
(STREAM T T)>, in process toplevel(2).

> Error: on #<BASIC-CHARACTER-OUTPUT-STREAM UTF-8 (PIPE/1) #x18353C96> :

>        Broken pipe during write

> While executing: #<CCL::STANDARD-KERNEL-METHOD CCL::STREAM-IO-ERROR
(STREAM T T)>, in process toplevel(2).

> Error: on #<BASIC-CHARACTER-OUTPUT-STREAM UTF-8 (PIPE/1) #x18353C96> :

>        Broken pipe during write

> While executing: #<CCL::STANDARD-KERNEL-METHOD CCL::STREAM-IO-ERROR
(STREAM T T)>, in process toplevel(2).

Unrecoverable stack overflow.

? for help

[5134] Clozure CL kernel debugger:

 

Any hints very welcome.

 

Best Regards

Andreas Thiele

 

 

 

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