Open attachment 164800 [details] in a debug build, that uses Skia. On my system, using Version: 24.2.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: 0a17e45e3fed13c240629fdf0dbb00b8908f5acc CPU threads: 12; OS: Windows 10.0 Build 19045; UI render: Skia/Raster; VCL: win Locale: ru-RU (ru_RU); UI: en-US Calc: CL threaded I get an assertion failure at https://opengrok.libreoffice.org/xref/core/vcl/skia/salbmp.cxx?r=5baac4e5&mo=9179&fi=261#263. Related to commit b94a2dc95dce8c67ddb9f01f7bd91da2a5759d9c, that introduced https://opengrok.libreoffice.org/xref/core/vcl/source/filter/graphicfilter.cxx?r=cf40ee4a#639 (creating a BitmapEx from the alpha mask, when there is an open write access to it, which tries to create an info access, which fails the assertion).
Mike Kaganski committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/3cf3e0e21d2f7fa33abced5e2f7291de6e4441eb tdf#156856: close write access before using AlphaMask It will be available in 24.2.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.