Description of problem:
Select some text and try to apply it a text style.

Version-Release number of selected component:
lyx-2.1.4-2.fc23

Additional info:
reporter:       libreport-2.6.2
backtrace_rating: 4
cmdline:        /usr/bin/lyx
crash_function: operator delete(void*)
executable:     /usr/bin/lyx
global_pid:     7778
kernel:         4.2.0-1.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (5 frames)
 #6 operator delete(void*) at ../../../../libstdc++-v3/libsupc++/del_op.cc:46
 #7 lyx::(anonymous namespace)::doFontSwitch(std::vector<lyx::html::FontTag, std::allocator<lyx::html::FontTag> > &, std::vector<lyx::html::EndFontTag, std::allocator<lyx::html::EndFontTag> > &, bool &, enum lyx::FontState, enum lyx::html::FontTypes) at /usr/include/c++/5.1.1/ext/new_allocator.h:110
 #15 lyx::Paragraph::simpleLyXHTMLOnePar[abi:cxx11](lyx::Buffer const&, lyx::XHTMLStream&, lyx::OutputParams const&, lyx::Font const&, long) const at Paragraph.cpp:2899
 #16 lyx::(anonymous namespace)::makeParagraphs(lyx::Buffer const&, lyx::XHTMLStream&, lyx::OutputParams const&, lyx::Text const&, lyx::RandomAccessList<lyx::Paragraph>::const_iterator const&, lyx::RandomAccessList<lyx::Paragraph>::const_iterator const&) at output_xhtml.cpp:898
 #17 lyx::xhtmlParagraphs(lyx::Text const&, lyx::Buffer const&, lyx::XHTMLStream&, lyx::OutputParams const&) at output_xhtml.cpp:1197