continue not worked when loop over sparse field

[g1n0st]

Describe the bug

continue statement seems not to work when looping over the sparse field. The continue will jump out of the current loop and skip the whole activated block.

To Reproduce

import taichi as ti

ti.init(arch=ti.cuda, kernel_profiler = False)

n = 128
x = ti.field(ti.f32)
block = ti.root.pointer(ti.i, n // 16)
block.dense(ti.i, 16).place(x)

@ti.kernel 
def test():
    x[0] = 1
    x[1] = 2
    cnt = 0
    for i in x:
        if x[i] == 1: continue
        if x[i] == 2: cnt += 1
    print(cnt) # output 0

test()