Closed
Description
- IE11 Fragment false positive warning fix (Warning in IE 11 when using React.Fragment #12500, fixed in Validate React.Fragment props without Map. #12504)
- Big DEV mode performance regression (Possible regression in dev mode in v16.3 #12502, fixed in Fix DEV performance regression by avoiding Object.assign on Fibers #12510)
- Error handling bugs related to replaying (Cannot read property 'return' of null #12449, fixed in Fix context stack misalignment caused by error replay #12508)