My point was that very few things work and that was an example. Multi digit numbers will fail. Here's a few examples that doesn't segfault:

3+7

a=3+7

a,a,a

b=a,a,a

{b

b+9

p=2,3,5,7

2{p

{p

~8

<~8

#~8

4#3

c=b#2

c,c