Hi all, I was trying to work out the streams mechanism, and found the following bug (I call my streams [left] and [right]): * An unwanted extra compensating line is inserted after the first block of the [left] stream that is as tall as, or shorter than, its corresponding block in the [right] stream. * If that extra line has not yet been inserted, then when two blocks have the same height the one on the [left] is wrongly measured as being shorter. (For a single line containing a capital A, it's 561512 vs 932551.) * This happens only once: subsequent identical-content blocks will indeed have identical heights. This is just a bug report; for me, at least, a fix is not required. Minimal example and relevant bit from its output log below. Cheers, Sietse Sietse Brouwer ---- minimal example ---- \enabletrackers[streams.flushing] \setuplayout[grid=yes] \showgrid \starttext \enableoutputstream[left] A %\input ward \par \pushoutputstream % Unwanted compensating line inserted here B \par \pushoutputstream % If the Ward paragraph is enabled, the extra line is inserted here, instead. C \par \pushoutputstream \enableoutputstream[right] A \par \pushoutputstream B \par \pushoutputstream C \par \pushoutputstream \disableoutputstream \synchronizestreams[left,right] \page \flushoutputstream[left] \page \flushoutputstream[right] \stoptext -------- excerpt from output log ----------- streams > synchronizing list: left right streams > maximum number of slots: 4 streams > slot 1 of 'left' is packed to height 561512 and depth 0 streams > slot 1 of 'right' is packed to height 932551 and depth 0 streams > slot 1 has max height 932551 and max depth 0 streams > slot 1:1 with delta (371039,0) is compensated by 1 lines streams > slot 2 of 'left' is packed to height 949066 and depth 0 streams > slot 2 of 'right' is packed to height 949066 and depth 0 streams > slot 2 has max height 949066 and max depth 0 streams > slot 3 of 'left' is packed to height 949066 and depth 16515 streams > slot 3 of 'right' is packed to height 949066 and depth 16515 streams > slot 3 has max height 949066 and max depth 16515 streams > slot 4 has max height 0 and max depth 0 streams > flushing 4 slots of 'left' backend > xmp > using file '/opt/context/tex/texmf-context/tex/context/base/lpdf-pdx.xml' pages > flushing realpage 1, userpage 1 streams > flushing 4 slots of 'right' pages > flushing realpage 2, userpage 2