filter() does not work after 1.9.0 if noFill() is called

Topic

filter() was introduced in webgl mode in 1.8.0. At this time, it seems that filter() was still working even with noFill().

// version: 1.8.0
function setup() {
   createCanvas(200,200,WEBGL);
 }
  
 function draw() {
   background(0);
   noFill();
   stroke(255);
   line(-100,-100,300,300);
   filter(INVERT);
 }

However, since 1.9.0, filter() does not work if noFill() is called. Of course it doesn't work with 1.11.2 either.

It will be drawn when you execute fill().

function setup() {
    createCanvas(200,200,WEBGL);
}

function draw() {
    background(0);
    noFill();
    stroke(255);
    line(-100,-100,300,300);
    
    fill(255);
    
    filter(INVERT);
}

It seems nonsensical to have to call pointless fill() to filter a sketch that just draws lines.
But I don't know if this is a bug or not.

That's all for raising the issue.

Reproduce the supplied WEBGL sketch with filter(), noFill(), and a line in p5.js 1.8.0 and 1.9.0 to confirm the regression. Trace the WebGL paths for filter() and noFill(); done means the filter is applied to a no-fill sketch without requiring a pointless fill() call, with coverage for the reported behavior.