while (pos() < lastpos() && mc == nextMath().mathClass());
} else if (openable(nextAtom())) {
InsetMathScript const * n = nextMath().asScriptInset();
- bool to_brace_deco = n
+ bool to_brace_deco = n && !n->nuc().empty()
&& n->nuc().back()->lyxCode() == MATH_DECORATION_CODE
&& n->nuc().back()->mathClass() == MC_OP;
// single step: try to enter the next inset
}
} else if (openable(prevAtom())) {
InsetMathScript const * p = prevMath().asScriptInset();
- bool to_brace_deco = p
+ bool to_brace_deco = p && !p->nuc().empty()
&& p->nuc().back()->lyxCode() == MATH_DECORATION_CODE
&& p->nuc().back()->mathClass() == MC_OP;
// single step: try to enter the preceding inset