[debbugs-tracker] bug#17681: closed (24.3.91; "Arithmetic Error" in hide-ifdef mode when using shift operators)

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Your message dated Sun, 26 Jun 2016 00:53:39 -0400
with message-id <address@hidden>
and subject line Re: bug#17681: 24.3.91; "Arithmetic Error" in hide-ifdef mode 
when using shift operators
has caused the debbugs.gnu.org bug report #17681,
regarding 24.3.91; "Arithmetic Error" in hide-ifdef mode when using shift 
operators
to be marked as done.

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17681: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17681
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> --- Begin Message ---
>
>
>
> Subject: 
>
> 24.3.91; "Arithmetic Error" in hide-ifdef mode when using shift operators
>
>
>
>
> Date: 
>
> Tue, 03 Jun 2014 21:12:33 +0200
>
>
>
>
> Recipe:
>
> - Create a file "test.h" containing the following (this is from
>   the file 'jiffies.h' in the Linux kernel):
>
> #if !((((NSEC_PER_SEC << 2) / TICK_NSEC) << (SEC_JIFFIE_SC - 2)) & 0x80000000)
> #endif
>
> - emacs -Q
>
> - Load the file, activate hide-ifdef-mode
>
> - C-c @ h  (hide-ifdefs)
>
> The minibuffer will show "Arithmetic Error". Here is the backtrace:
>
> Debugger entered--Lisp error: (arith-error)
>   hif-divide(0 nil)
>   (hif-shiftleft (hif-divide (hif-shiftleft (hif-lookup (quote NSEC_PER_SEC)) 
> 2) (hif-lookup (quote TICK_NSEC))) (hif-minus (hif-lookup (quote 
> SEC_JIFFIE_SC)) 2))
>   (hif-logand (hif-shiftleft (hif-divide (hif-shiftleft (hif-lookup (quote 
> NSEC_PER_SEC)) 2) (hif-lookup (quote TICK_NSEC))) (hif-minus (hif-lookup (quote 
> SEC_JIFFIE_SC)) 2)) 2147483648.0)
>   (hif-not (hif-logand (hif-shiftleft (hif-divide (hif-shiftleft (hif-lookup 
> (quote NSEC_PER_SEC)) 2) (hif-lookup (quote TICK_NSEC))) (hif-minus (hif-lookup 
> (quote SEC_JIFFIE_SC)) 2)) 2147483648.0))
>   eval((hif-not (hif-logand (hif-shiftleft (hif-divide (hif-shiftleft 
> (hif-lookup (quote NSEC_PER_SEC)) 2) (hif-lookup (quote TICK_NSEC))) (hif-minus 
> (hif-lookup (quote SEC_JIFFIE_SC)) 2)) 2147483648.0)))
>   hif-possibly-hide()
>   hide-ifdef-guts()
>   hide-ifdefs()
>
> Earlier Emacsen did not throw an error here (although it is very
> possible that the above line wasn't calculated correctly). Still, this
> probably qualifies as a regression.
>
> -David
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#17681: 24.3.91; "Arithmetic Error" in hide-ifdef mode when using shift operators
>
>
>
>
> Date: 
>
> Sun, 26 Jun 2016 00:53:39 -0400
>
>
>
>
> Version: 25.0.95
>
> I see the problem in Emacs 24.5, but not Emacs 25.0.95, so it seems to
> have been fixed sometime in between.
>
>
> --- End Message ---