Hello. I run geany 1.37.1 on Fedora 33 and Geany crashes when I try to put a space between an emoji and Unicode VARIATION SELECTOR-16.
Steps to reproduce:
1. Enable the Spell Check plugin and enable spell checking. I use en_US in case it matters. 2. Insert an emoji with VARIATION SELECTOR-16, e.g. ☃️ (select the entire line form the *source* of this comment or [from here](https://blog.tomayac.com/2019/12/12/same-same-but-different-unicode-variatio...)). 3. Move the cursor between the two characters: ![_](https://user-images.githubusercontent.com/2401856/100599500-673d0180-3300-11...) 4. Type "space" (or any other character it seems). 5. Geany crashes (aborts).
``` /usr/include/c++/10/bits/stl_vector.h:1063: std::vector<_Tp, _Alloc>::const_reference std::vector<_Tp, _Alloc>::operator[](std::vector<_Tp, _Alloc>::size_type) const [with _Tp = unsigned char; _Alloc = std::allocator<unsigned char>; std::vector<_Tp, _Alloc>::const_reference = const unsigned char&; std::vector<_Tp, _Alloc>::size_type = long unsigned int]: Assertion '__builtin_expect(__n < this->size(), true)' failed. ```