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Fix comitted, will be included in next release.
I tend to use shell process substitutions a lot with diff. However, when I try to do the same with wdiff, I loose output without any indication that anything might have gone wrong. To test this, try the following: wdiff <(echo here foo there) <(echo here bar there)
The primary cause of this is that this kind of input is not seekable. wdiff already contains some code to copy input to a temporary file, but it uses that method only for stdin.
The attached patch checks whether or not a stream is seekable, and copies it to a temporary buffer if not. With this patch in place, the above command produces the expected output. As an added benefit, in cases where stdin is seekable, unnecessary buffering is avoided, though this case is probably rare.
(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)
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