Re: [NoW] Luac crashes when trying to display undefined instruction

[Egor Skriptunoff <egor.skriptunoff@...>]

On Fri, Jan 25, 2019 at 1:42 AM Luiz Henrique de Figueiredo wrote:

> The crash could be reproduced on any Luac version.
> For example, to create such bytecode for little-endian Luac 5.3, it is enough to replace the "return" instruction with reserved opcode=63

Ok, the problem is the following line in PrintCode, which only works
if o < NUM_OPCODES :

printf("%-9s\t",luaP_opnames[o]);

Yes, that's array index out of bounds error.

Could you please fix it in Luac?

(for example, to display opcode when opname doesn't exist)