MobileRead Forums - View Single Post - Sigil 2.8.6 crashes on Windows11 when adding a cover to a large EPUB3

KevinH · Today, 06:03 PM

Your debug info shows the bug has heap corruption when sigil gumbo tries to reallocate memory on the stack. My guess is the size of the epub is using up the available stack on one thread but I am not sure why that would cause heap corruption instead of code or stack corruption.

My guess is your Windows box does not have enough memory ... or maybe a recursion (which is capped in Sigil) during parsing is happening that is resulting in a stack limit being reached. On macOs or unix you can use ulimit to set appropriate runtime stack sizes. I am not sure how to control the default C++ stack size on Windows. You could also be reaching a limit on the number of open file descriptors. These is nothing specific to the Sigil codebase that should be limiting you.

Please zip up your epub, then post it someplace, and PM a web link to KevinH (me) here on Mobileread. I will use it to try to recreate what you are seeing on Linux and MacOS.

Having over 2000 chapters/files in a single epub does seem like a bit extreme. Is there some reason for so many files?

Today, 06:03 PM	#2
KevinH Sigil Developer Posts: 10,206 Karma: 7640000 Join Date: Nov 2009 Device: many	Your debug info shows the bug has heap corruption when sigil gumbo tries to reallocate memory on the stack. My guess is the size of the epub is using up the available stack on one thread but I am not sure why that would cause heap corruption instead of code or stack corruption. My guess is your Windows box does not have enough memory ... or maybe a recursion (which is capped in Sigil) during parsing is happening that is resulting in a stack limit being reached. On macOs or unix you can use ulimit to set appropriate runtime stack sizes. I am not sure how to control the default C++ stack size on Windows. You could also be reaching a limit on the number of open file descriptors. These is nothing specific to the Sigil codebase that should be limiting you. Please zip up your epub, then post it someplace, and PM a web link to KevinH (me) here on Mobileread. I will use it to try to recreate what you are seeing on Linux and MacOS. Having over 2000 chapters/files in a single epub does seem like a bit extreme. Is there some reason for so many files? Last edited by KevinH; Today at 10:14 PM.