- to fail within sight of success (idiom); last-minute failure
- to fall at the last hurdle
- snatching defeat from the jaws of victory
“fail when success is already in sight; fail in a great undertaking on the verge of success”
垂：接近，快要。事情在将要成功的时候遭到了失败。
Origin 《晋书·谢玄传论》：“庙算有余，良图不果；降龄何促，功败垂成。”
Example 况且十二道金牌，他未必不知道是假的，何必就班师回去，以致～。（清·吴趼人《二十年目睹之怪现状》第六十一回）