Whitespace between math operators

[codyebberson]

Try this in the online demo:

const f = (t) => 1 - --t;

console.log(f(1));

That generates:

eval(Function("[M='EGLYWeQK{NHDV^vz}BAr`{yaBxjDGZic_CHz]FFSD{|c'"
,...']charCodeAtUinyxp',"for(;e<38;c[e++]=x-128)for(x=1;x<128;n=p.map((i,y)=>(t=r[i]*2+1,t=Math.log(t/(h-t)),A-=a[y]*t,t/500)),A=~-h/(1+Math.exp(A))|1,U=o%h<A,o=o%h+(U?A:h-A)*(o>>17)-!U*A,p.map((i,y)=>(t=r[i]+=(U*h/2-r[i]<<13)/((C[i]+=C[i]<5)+1/20)>>13,a[y]+=n[y]*(U-A/h))),x=x*2+U)for(p='010202103203210431053105410642065206541'.split(A=0).map((i,y)=>(t=0,[...i].map((i,y)=>(t=t*997+(c[e-i]|0)|0)),h*32-1&t*997+x)*12+y);o<h*32;o=o*64|M.charCodeAt(d++)&63);return String.fromCharCode(...c)")([],[],1<<17,[0,0,0,0,0,0,0,0,0,0,0,0],new Uint16Array(51e6).fill(1<<15),new Uint8Array(51e6),0,0,0))

If you replace eval with console.log, the result is:

const f=(t)=>1---t;
console.log(f(1));

Which is invalid. Invalid left-hand side expression in postfix operation The white space between the minus - and the decrement -- is significant.