bug in loop protection macro expansion

p5.js version

1.11.11

What is your operating system?

Windows

Web browser and version

chrome 149.0.7827.104

Actual Behavior

"ReferenceError: _LP0 is not defined"

Expected Behavior

expected to run fine without errors.

Steps to reproduce

When run this code:
--- code begins --
//#つぶやきProcessing #p5js
t=0,h=.03
draw=_=>{
t||createCanvas(W=(w=200)2,W)+noStroke()+colorMode(HSB)
background(1,.1)
for(u=-4;u<4;u+=h)
for(i=0,x=u,y=u;i<t;i++)
[x,y]=[(x-y-x(S=xx+yy))h+x,(x-y+yS)h+y],
rect(X=xw+w,Y=yw+w,(fill(wcos(X-Y+t/17),w,w,.3),8))
t=++t%W}
--- code ends ---
Got this:
ReferenceError: LP0 is not defined
at /sketch.js:12:30
Instead, when run this code (with braces '{}')
--- code begins ---
//#つぶやきProcessing #p5js
t=0,h=.03
draw==>{
t||createCanvas(W=(w=200)2,W)+noStroke()+colorMode(HSB)
background(1,.1)
for(u=-4;u<4;u+=h)
{ // added
for(i=0,x=u,y=u;i<t;i++)
[x,y]=[(x-y-x(S=xx+yy))h+x,(x-y+yS)h+y],
rect(X=xw+w,Y=yw+w,(fill(wcos(X-Y+t/17),w,w,.3),8))
} // added
t=++t%W}
--- code ends ---
Runs fine.

Reproduce the report with the provided p5.js sketch in the p5.js Editor, then inspect the loop-protection macro expansion that generates the _LP0 reference. Compare the failing loop without braces to the working braced version; done means the original sketch runs without a ReferenceError and does not require added braces.