On Sun, Sep 13, 2020 at 11:43:31AM +0100, José Abílio Matos wrote: > On Sunday, September 13, 2020 5:42:55 AM WEST Scott Kostyshak wrote: > > On current master I get the following: > > > > $ lyx -e lyx20x Beamer.lyx && lyx Beamer.20.lyx > > Warning: Malformed LyX document: Missing layout name on line 1876 > > Warning: Malformed LyX document: Missing layout name on line 3053 > > Warning: Malformed LyX document: Missing layout name on line 4716 > > > > The reason this might be a regression is that if I first export to 2.3.x > > format, and then in 2.3.0 I do the roundtrip with 2.0.x format, I do not > > get those warnings: > > > > $ lyx -e lyx23x Beamer.lyx > > $ lyx230 -e lyx20x Beamer.23.lyx && lyx230 Beamer.23.20.lyx > > First the general consideration: > LyX 2.1 was the version where Jürgen's overhaul of the beamer layout was > implemented. I like and I prefer it to the previous version but this change > implied a significant change from the previous layout. > > The conversion from lyx 2.0 format (from a beamer layout) to 2.1 is a tricky > issue. The reversion is even more difficult and is done on a best effort > basis. > The round trip for a beamer layout, 2.1 -> 2.0 -> 2.1 is useless in practical > terms.
Sounds like this test is a good candidate to be inverted (i.e., tell the tests we expect it to fail). It might not be worth the time to investigate. > FWIW in the general case it would also be nice to be able to assess in > the roundtrip the delta from the pdf output although that can not > easily be done in an automatic way. :-) We do actually have support for detecting and using "comparepdf", which is a command-line tool that can look for differences in text or appearance. We don't use it much though. > Second consideration: > If there is difference by doing the reversion by stages between 2.3 and 2.4 > codes we need to see how the lyx2lyx code for reversions has changed for > lyx_23.py, lyx_22.py and lyx_21.py. The list should be very small. > > Now after this long preamble I do not see the problem you describe. The lyx > files loads correctly but on the other hand I can not compile the resulting > document it fails in the same way for all the versions complaining that: > ! Argument of \beamer@decodegobble has an extra }. Compilation errors for old formats is in some sense expected. The development.lyx manual states the following: the minimum requirement of the reversion routine is that it produces a valid document which can be read by an older LyX > FWIW I am using Fedora 33 (with python 3.9 beta) but I do not see how this > could make a difference. :-) Interesting. I'm surprised you don't get the terminal warnings. I guess differences in Python version are the only thing that can explain that. Scott
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