when I try to promote a piece in a log (such as in this log with W 13j-12k; +W-dest), when I click Preview, it redirects to a blank GC preset page.
That's weird. After getting the same result, I looked at the HTML code for the form, and I saw nothing amiss. It included values for game, settings, and log.
I tested Shogi to see if it happened there. It did not, though it was using ask instead of askpromote to just ask if you wanted to promote.
Since Chess now handles promotion differently than it used to, I tested Marseillais Chess, which is using an older include file that still uses askpromote. I marched up two Pawns, and it worked fine for both of them.
Turning back to the HTML of your form, I did see that positions had a value, which was unusual. This is used only for the Custom shape, but you were using the Square shape with Table rendering. I did briefly use the $positions variable for what I renamed $posdata before I noticed it was already in use. But using grep to see where I might be misusing $positions didn't turn up anything suspicious. But it did occur to me that during the brief time when I was using the $positions name for $posdata, it could have gotten recorded in your log. That did happen, making your log really huge. I deleted the line, and that fixed things. So, I expect it was such a huge line, it wasn't recorded in full, and this broke your form. I wonder if I'll have to do something to compress the $posdata value for large games like this. In my initial test, it seems to be working fine for your game. I was able to go through the moves in your game from start to finish.
That's weird. After getting the same result, I looked at the HTML code for the form, and I saw nothing amiss. It included values for game, settings, and log.
I tested Shogi to see if it happened there. It did not, though it was using
askinstead ofaskpromoteto just ask if you wanted to promote.Since Chess now handles promotion differently than it used to, I tested Marseillais Chess, which is using an older include file that still uses
askpromote. I marched up two Pawns, and it worked fine for both of them.Turning back to the HTML of your form, I did see that
positionshad a value, which was unusual. This is used only for the Custom shape, but you were using the Square shape with Table rendering. I did briefly use the $positions variable for what I renamed $posdata before I noticed it was already in use. But using grep to see where I might be misusing $positions didn't turn up anything suspicious. But it did occur to me that during the brief time when I was using the $positions name for $posdata, it could have gotten recorded in your log. That did happen, making your log really huge. I deleted the line, and that fixed things. So, I expect it was such a huge line, it wasn't recorded in full, and this broke your form. I wonder if I'll have to do something to compress the $posdata value for large games like this. In my initial test, it seems to be working fine for your game. I was able to go through the moves in your game from start to finish.