*** Error in `./bonzomatic': free(): invalid next size (fast): 0x000056048520f980 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x70bfb)[0x7fa3c7f6ebfb]
/lib/x86_64-linux-gnu/libc.so.6(+0x76fc6)[0x7fa3c7f74fc6]
/lib/x86_64-linux-gnu/libc.so.6(+0x7780e)[0x7fa3c7f7580e]
./bonzomatic(_ZN9Scintilla10LineLayout4FreeEv+0x7b)[0x56048373ba39]
./bonzomatic(_ZN9Scintilla10LineLayoutD2Ev+0x26)[0x56048373b8ea]
./bonzomatic(_ZN9Scintilla10LineLayoutD0Ev+0x18)[0x56048373b906]
./bonzomatic(_ZN9Scintilla15LineLayoutCache8RetrieveEiiiiii+0x21c)[0x56048373c920]
./bonzomatic(_ZN9Scintilla8EditView18RetrieveLineLayoutEiRKNS_9EditModelE+0x143)[0x56048372377f]
./bonzomatic(_ZN9Scintilla6Editor11WrapOneLineEPNS_7SurfaceEi+0x30)[0x560483702c9c]
./bonzomatic(_ZN9Scintilla6Editor9WrapLinesENS0_9wrapScopeE+0x487)[0x56048370323f]
./bonzomatic(_ZN9Scintilla6Editor5PaintEPNS_7SurfaceENS_10PRectangleE+0x10e)[0x560483703e88]
./bonzomatic(_ZN12ShaderEditor5PaintEv+0xa5)[0x56048363edc5]
./bonzomatic(main+0x463e)[0x56048364641e]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0x7fa3c7f1e2e1]
./bonzomatic(_start+0x2a)[0x56048362adaa]
======= Memory map: ========

typedef float XYPOSITION;

class LineLayout {
  ...
  XYPOSITION *positions;
  ...
}

void LineLayout::Free() {
    delete []chars;
    chars = 0;
    delete []styles;
    styles = 0;
    delete []positions; // <-- Тут сегфолт
    positions = 0;
    delete []lineStarts;
    lineStarts = 0;
}

// Extra position allocated as sometimes the Windows
// GetTextExtentExPoint API writes an extra element.
positions = new XYPOSITION[maxLineLength_ + 1 + 1];

...

positions = new XYPOSITION[len + (len / 4) + 1];