fix catch for vad

雾聪

2023-08-09 268adb8c1eafb95498e91b9657ed7f66d4d71c20

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p m    p.m.
pm    p.m.
p.m.
p.m    p.m.
am    a.m.
a.m.
a.m    a.m.
a m    a.m.