RuntimeError: unreachable when creating colliders quickly, starting in 0.18.0, still present in 0.19.3

[cortezpage]

RuntimeError: unreachable
    at 005fccd2:0x150170
    at 005fccd2:0x1693da
    at 005fccd2:0x164b78
    at 005fccd2:0x5a741
    at 005fccd2:0xee8b5
    at 005fccd2:0x25a63
    at 005fccd2:0xc7b2c
    at hA.step (rapier_wasm3d.js:3853:14)
    at hg.step (physics_pipeline.ts:69:22)
    at sg.step (world.ts:269:30)

It works fine in 0.17.3, but I get the error in 0.18.0.

The faster I create colliders (tested with cuboid colliders), the faster the error happens. If I create hundreds per second, then I usually get the error within a second. If I create slower, the error is rarer.

Similar issue: #283