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| From | Chet Ramey <chet.ramey@case.edu> |
| Newsgroups | gnu.bash.bug |
| Subject | Re: Error on arithmetic evaluation of `~0`. |
| Date | Sat, 22 Dec 2018 12:02:47 -0500 |
| Organization | ITS, Case Western Reserve University |
| Lines | 24 |
| Approved | bug-bash@gnu.org |
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On 12/20/18 8:12 AM, Greg Wooledge wrote: > The issue you're reporting appears to be present in arithmetic contexts > in general, not only arrays: > > wooledg:~$ echo $((~0)) > bash: /home/wooledg: syntax error: operand expected (error token is "/home/wooledg") This is what was fixed post-bash-4.4. I left the array subscript expansion unchanged for backwards compatibility. > It appears that bash is performing tilde expansion when there's no > whitespace in front of the tilde, or bitwise negation if there is > whitespace. Because tilde expansion only happens on the first character of a string, or following an unquoted `=' or `:'. Chet -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
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Re: Error on arithmetic evaluation of `~0`. Chet Ramey <chet.ramey@case.edu> - 2018-12-22 12:02 -0500
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