Thanks I am able to reproduce the crash for glfont '' Сб, 01 июн 2013, Henry Rich писал(а): > Uh-oh. The problem was not fixed after all. I turned on a debug > switch to see what was happening, saw the empty strings (in J6), then > threw them out and tested in J8, and it worked. > > But it only worked with the debugging statements in. These > statements type out info about the graphics being drawn. When I took > out the typeout, it crashes again. > > By dumping results out to a log file, I determined that jqt crashes > when my code calls glfont with an empty for an operand. I have fixed > the code to stop doing that, and it works now with no debug > statements. > > jqt should be fixed to ignore the empty font too. The operand I was > giving was an empty string. > > > > So why did the debug typeout mask the problem? The text was drawn > from a line like > > font_info drawtext"2 text_info > > where font_info has rank 2 and text_info has rank 3 (to use the same > font_info twice). > > The drawtext verb looked like: > > drawtext =: 4 : 0"1 > if. DEBUG do. > debug typeout > end. > glfont etc. > ) > > The failure happened when font_info and text_info were empty. In > this case, drawtext was executed on a cell of fills. This crashed J8 > on the glfont line, because the cell of fills contained empty strings > for font and size. > > But with debugging turned on, the debug typeout, which expected valid > font info, failed. However, since it was executing in a cell of > fills, it failed quietly: the execution of drawtext was aborted > (before it could get to the deadly glfont), and the rest of the code > ran as usual. > > > > dissect is now fixed on the server. > > Henry Rich > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm
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