onUpdate 引用丢失，

[pangyuanling2019]

mf-dep____vendor.5e02c6fc.js:762951 Uncaught TypeError: Cannot read properties of null (reading 'set')
at onUpdate (mf-dep____vendor.5e02c6fc.js:762951:30)
at new ProviderBridge (mf-dep____vendor.5e02c6fc.js:762878:21)
at constructClassInstance (mf-dep____vendor.5e02c6fc.js:782572:18)
at updateClassComponent (mf-dep____vendor.5e02c6fc.js:784087:5)
at beginWork (mf-dep____vendor.5e02c6fc.js:786020:16)
at beginWork$1 (mf-dep____vendor.5e02c6fc.js:791835:14)
at performUnitOfWork (mf-dep____vendor.5e02c6fc.js:790966:12)
at workLoopSync (mf-dep____vendor.5e02c6fc.js:790875:5)
at renderRootSync (mf-dep____vendor.5e02c6fc.js:790843:7)
at recoverFromConcurrentError (mf-dep____vendor.5e02c6fc.js:790259:20)
at performConcurrentWorkOnRoot (mf-dep____vendor.5e02c6fc.js:790159:22)
at workLoop (mf-dep____vendor.5e02c6fc.js:836741:34)
at flushWork (mf-dep____vendor.5e02c6fc.js:836714:14)
at MessagePort.performWorkUntilDeadline (mf-dep____vendor.5e02c6fc.js:837008:21)
onUpdate @ mf-dep____vendor.5e02c6fc.js:762951
ProviderBridge @ mf-dep____vendor.5e02c6fc.js:762878
constructClassInstance @ mf-dep____vendor.5e02c6fc.js:782572
updateClassComponent @ mf-dep____vendor.5e02c6fc.js:784087
beginWork @ mf-dep____vendor.5e02c6fc.js:786020
beginWork$1 @ mf-dep____vendor.5e02c6fc.js:791835
performUnitOfWork @ mf-dep____vendor.5e02c6fc.js:790966
workLoopSync @ mf-dep____vendor.5e02c6fc.js:790875
renderRootSync @ mf-dep____vendor.5e02c6fc.js:790843
recoverFromConcurrentError @ mf-dep____vendor.5e02c6fc.js:790259
performConcurrentWorkOnRoot @ mf-dep____vendor.5e02c6fc.js:790159
workLoop @ mf-dep____vendor.5e02c6fc.js:836741
flushWork @ mf-dep____vendor.5e02c6fc.js:836714
performWorkUntilDeadline @ mf-dep____vendor.5e02c6fc.js:837008