https://bugs.documentfoundation.org/show_bug.cgi?id=162255

            Bug ID: 162255
           Summary: Math crashes when clicking "fonts"
           Product: LibreOffice
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Formula Editor
          Assignee: [email protected]
          Reporter: [email protected]

Version: 24.2.5.2 (X86_64)
Build ID: 420(Build:2)
CPU threads: 16; OS: Linux 6.9; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded

Opening the formula editor, and in a blank document choosing "Styles and
formatting" - the content is empty. Clicking "Fill Format Mode" or the other
buttons results in a stack dump/crash:

$ libreoffice --math
/usr/include/c++/14/optional:475: constexpr _Tp& std::_Optional_base_impl<_Tp,
_Dp>::_M_get() [with _Tp = std::vector<SfxStyleFamilyItem>; _Dp =
std::_Optional_base<std::vector<SfxStyleFamilyItem>, false, false>]: Assertion
'this->_M_is_engaged()' failed.


Fatal exception: Signal 6
Stack:
/usr/lib64/libreoffice/program/libuno_sal.so.3(+0x3fa86)[0x7f8219e81a86]
/usr/lib64/libreoffice/program/libuno_sal.so.3(+0x3fc72)[0x7f8219e81c72]
/lib64/libc.so.6(+0x40d00)[0x7f8219b63d00]
/lib64/libc.so.6(+0x994a4)[0x7f8219bbc4a4]
/lib64/libc.so.6(gsignal+0x1e)[0x7f8219b63c4e]
/lib64/libc.so.6(abort+0xdf)[0x7f8219b4b902]
/lib64/libstdc++.so.6(_ZNSt6chrono3_V212system_clock3nowEv+0x0)[0x7f82198dabf0]
/usr/lib64/libreoffice/program/libsfxlo.so(+0x28198f)[0x7f821848198f]
/usr/lib64/libreoffice/program/libsfxlo.so(+0x27f1c2)[0x7f821847f1c2]
/usr/lib64/libreoffice/program/libvclplug_gtk3lo.so(+0xbe484)[0x7f82028ef484]
/lib64/libgobject-2.0.so.0(+0x32254)[0x7f8212eb0254]
/lib64/libgobject-2.0.so.0(g_signal_emit_by_name+0x1f8)[0x7f8212eb0638]
/lib64/libgobject-2.0.so.0(g_closure_invoke+0x14a)[0x7f8212e8f64a]
/lib64/libgobject-2.0.so.0(+0x415f3)[0x7f8212ebf5f3]
/lib64/libgobject-2.0.so.0(+0x32104)[0x7f8212eb0104]
/lib64/libgobject-2.0.so.0(g_signal_emit_valist+0x41)[0x7f8212eb0361]
/lib64/libgobject-2.0.so.0(g_signal_emit+0x93)[0x7f8212eb0423]
/lib64/libgtk-3.so.0(+0xcb721)[0x7f82020cb721]
/lib64/libgobject-2.0.so.0(g_closure_invoke+0x14a)[0x7f8212e8f64a]
/lib64/libgobject-2.0.so.0(+0x41720)[0x7f8212ebf720]
/lib64/libgobject-2.0.so.0(+0x32104)[0x7f8212eb0104]
/lib64/libgobject-2.0.so.0(g_signal_emit_valist+0x41)[0x7f8212eb0361]
/lib64/libgobject-2.0.so.0(g_signal_emit+0x93)[0x7f8212eb0423]
/lib64/libgtk-3.so.0(+0xcb55d)[0x7f82020cb55d]
/lib64/libgtk-3.so.0(+0x8a11c)[0x7f820208a11c]
/lib64/libgobject-2.0.so.0(+0x32254)[0x7f8212eb0254]
/lib64/libgobject-2.0.so.0(g_signal_emit_valist+0x41)[0x7f8212eb0361]
/lib64/libgobject-2.0.so.0(g_signal_emit+0x93)[0x7f8212eb0423]
/lib64/libgtk-3.so.0(+0x1a6fdb)[0x7f82021a6fdb]
/lib64/libgobject-2.0.so.0(g_cclosure_marshal_VOID__BOXEDv+0xa5)[0x7f8212e93c65]
/lib64/libgobject-2.0.so.0(+0x32254)[0x7f8212eb0254]
/lib64/libgobject-2.0.so.0(g_signal_emit_valist+0x41)[0x7f8212eb0361]
/lib64/libgobject-2.0.so.0(g_signal_emit+0x93)[0x7f8212eb0423]
/lib64/libgtk-3.so.0(+0x19ec24)[0x7f820219ec24]
/lib64/libgtk-3.so.0(+0x1a69b3)[0x7f82021a69b3]
/lib64/libgtk-3.so.0(+0x1aa21e)[0x7f82021aa21e]
/lib64/libgtk-3.so.0(gtk_event_controller_handle_event+0x73)[0x7f82021692d3]
/lib64/libgtk-3.so.0(+0x34ffd0)[0x7f820234ffd0]
/lib64/libgtk-3.so.0(+0x888d9)[0x7f82020888d9]
/lib64/libgobject-2.0.so.0(+0x32254)[0x7f8212eb0254]
/lib64/libgobject-2.0.so.0(g_signal_emit_valist+0x41)[0x7f8212eb0361]
/lib64/libgobject-2.0.so.0(g_signal_emit+0x93)[0x7f8212eb0423]
/lib64/libgtk-3.so.0(+0x35fe3c)[0x7f820235fe3c]
/lib64/libgtk-3.so.0(+0x1f4328)[0x7f82021f4328]
/lib64/libgtk-3.so.0(gtk_main_do_event+0xc1a)[0x7f82021f50aa]
/lib64/libgdk-3.so.0(+0x2d807)[0x7f8203327807]
/lib64/libgdk-3.so.0(+0x881de)[0x7f82033821de]
/lib64/libglib-2.0.so.0(+0x5ce8c)[0x7f8212d8ce8c]
/lib64/libglib-2.0.so.0(+0xbec98)[0x7f8212deec98]
/lib64/libglib-2.0.so.0(g_main_context_iteration+0x33)[0x7f8212d8e383]
/usr/lib64/libreoffice/program/libvclplug_gtk3lo.so(+0x91e44)[0x7f82028c2e44]
/usr/lib64/libreoffice/program/libvcllo.so(+0x58037e)[0x7f821658037e]
/usr/lib64/libreoffice/program/libvcllo.so(_ZN11Application7ExecuteEv+0x7d)[0x7f821658055d]
/usr/lib64/libreoffice/program/libsofficeapp.so(+0x40776)[0x7f8219d8e776]
/usr/lib64/libreoffice/program/libvcllo.so(_Z10ImplSVMainv+0x412)[0x7f8216595f62]
/usr/lib64/libreoffice/program/libsofficeapp.so(soffice_main+0x136)[0x7f8219daae16]
/usr/lib64/libreoffice/program/soffice.bin(+0x10c7)[0x561f6f2c60c7]
/lib64/libc.so.6(+0x2a088)[0x7f8219b4d088]
/lib64/libc.so.6(__libc_start_main+0x8b)[0x7f8219b4d14b]
/usr/lib64/libreoffice/program/soffice.bin(+0x1105)[0x561f6f2c6105]

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