The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
2022年佩德罗·卡斯蒂略弹劾事件成为这场制度危机的高潮。面对第三次弹劾威胁，佩德罗·卡斯蒂略试图先发制人，宣布解散国会、实施紧急状态并重组司法系统。这次自我政变迅速失败，当天国会以101票通过弹劾，将其罢免并逮捕，全国爆发抗议，政府进入紧急状态。那一刻，制度裂缝彻底暴露。，这一点在WPS下载最新地址中也有详细论述
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