Game suddenly ended with "GreError" and a forced draw
In the middle of a game, after some series of normal-seeming actions, the game suddenly stopped with a server error reading "GreError" (I assume meaning a game rules engine error?) and a forced draw from the server. (The pop-up itself said "Result: Draw", implying that the server had handed out that result after the GRE error.)
The client continued operating normally as if the match had been drawn (i.e., it showed the "Draw" result, allowed me to inspect the battlefield, returned to the home screen normally, etc.), but the match was obviously immediately stopped by this. (Thankfully a random unranked match, so I have no missed rewards to claim!)
I'm attaching the captured log (from the "report a bug" screen) as captured.log. Please keep in mind that I removed all lines beginning with "[Social.Chat]", since I don't want to post my chat messages in a public forum. (All chat happened long before the error, so I doubt it is of any relevance.)

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Angelis Mortis#81035 commented
Drop two echos of eternity, it produces three. Then drop anything that creates tokens and it's a GreError and a draw after an excruciating long wait for the engine to do simple math. Also the token limit needs to be higher and the speed of processing the calculations needs to be buffed. It's not the PC chugging, it's definitely the app because I can alt tab out and do other things while it's still chugging
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TheFakir#49465 commented
here is the log for that match
also, i find it problematic, that MY Turn is running out of time, while at the same time its me waiting hang on for the game to react, or also for opponent to react when [Over the top] is causing playouts from opposive players on their obvious surprise, they take some breath seconds to understand.
while this happens, my sand clock is being used upinstead. This makes it impossible to end the turn not even when you play fast. and breaks the game. it shouldnt be a performance problem 20 years into the modern age. its a children desease to hang with depricated picture deliverer no excuse!
Sorry for double post
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TheFakir#49465 commented
Hello I got another great example for Gre error. I have pictures, because I restarted MTGA while it hung 2 times.
My opponent played bugs, and when he is established, I play another [Over The top]"Hoch hinaus, not sure about it being strong, but then after playout ive seen, it would clear his deck to zero, and the match would end because of milling clear the library.
It would clear the library THROUGH [Gaias Blessing] (Gaeas Segen (Gaea's Blessing)) is in it, because [Over The top], does not count the mill, despit its actually the same thing happening. I find that weird and unlogic.
aditionally he would be killed by [Trespasser's Curse] "Fluch des EIndringlings" would he not have his bartener /innkeeper out.
but it would be impressive, if the graphics engine would be optimized to show up with what it calculates
we land at a stack of like 4914 reactions to resolve the game actually finished it!
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TheFakir#49465 commented
this is the log from today
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TheFakir#49465 commented
I HATE THIS BUG! I get into trouble EVERYTIME the boring 0815 turns into a "adult" skirmish for honesty...
i got a fan of "Hoch hinaus" [Over the top], and have this deck (exported into txt file).
The deck makes a heck of fun to play, and is quite a lot succesful, while i still polish it with different approaches.
when I put in "annies Bandenbeitritt"[Annie joins up] its really rocking havoc, too. It only lacks, when I dont get the mana up at start which happens sometimes, and I must focus on develop more mana first turns, so while it CAN defend most common rushes, its sometimes little bit trapped in the order of play out, e.g. when multiple enchantments on hand for 3 want to come to field together, and I stuck at 4 mana pool, and alike rush coming up.
while the deck is certainly designed to "intercept" a rush in time, its sometimes tricky or impossible.but the problem is: when I play against Angel decks, with lots of priests, the stack explodes ofc if combined with "[Over the top]". still, i have a good chance to get counters up at the same time, like
[Überwältigende Herrlichkeit] / [Overwhelming Splendor], or many others. give yourself a punch and discover HARD my newest invention its the best deck in MTGA honestly.PLEASE SOLVE THIS STACK BUG IT BREAKS the most beautiful encounters that MTGA HAS.
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Aarinfel#70191 commented
here's the logs:
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Aarinfel#70191 commented
Cast doppleganger X=10. Choose all valid targets (mostly forests) and the game acted like I was waiting for opponent to respond. After 3 min I closed and relaunched, because its buggy and sometimes that clear is to get the GreError Winner:Draw screen. Please fix Doppleganger. its almost unplayable because the interface doesn't handle anything more complicated that Mountain/Goblin/Swing/Boardwipe/Cry.