https://bugs.winehq.org/show_bug.cgi?id=47969 --- Comment #5 from Nikolay Sivov <bunglehead(a)gmail.com> --- Not sure if it's the same crash, but I get one after moving cursor over "Group By" button. It's crashing in toolbar code after receiving NULL pointer for button tooltip. Relevant application code: --- // Show tooltips case TBN_GETINFOTIP: { NMTBGETINFOTIP* git = reinterpret_cast<NMTBGETINFOTIP*>(lParam); git->cchTextMax = INFOTIPSIZE; if (git->hdr.hwndFrom == toolbar_.GetWindowHandle()) { git->pszText = const_cast<LPWSTR>(toolbar_.GetButtonTooltip(git->lParam)); } break; } --- C++ control wrappers are provided by another library by the same author, relevant method from there: --- LPCWSTR Toolbar::GetButtonTooltip(int index) { if (index < static_cast<int>(tooltip_text_.size())) if (!tooltip_text_[index].empty()) return tooltip_text_[index].c_str(); return nullptr; } --- Current we do lstrlenW() on returned pointer and crash. I verified there's no tooltip when running on Windows. Patch sent https://www.winehq.org/pipermail/wine-devel/2019-November/155707.html -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.