<!DOCTYPE html>
<script>
function run() {
    const contexts = [];
    for (let i = 0; i < 50; i++) {
        const c = document.createElement("canvas");
        const ctx = c.getContext("webgl");
        ctx.clearColor(0, 1, 0, 1);
        ctx.clear(ctx.COLOR_BUFFER_BIT);
        contexts.push(ctx);
    }
    contexts.forEach(ctx => {
        ctx.getError();
        ctx.getError();
        ctx.getError();
        ctx.getError();
    });
}

window.addEventListener("load", run, false);
</script>
<h1>Should not crash</h1>