That is a known issue with VS2019, which has been resolved in 5.1b01 and 5.1rc01. v5.1rc01 was tagged only yesterday, it will be some days before all the packages are created. If you need the pre-build packages, use 5.1 beta1. But since you are compiling yourself, I suggest you to use the yesterday’s 5.1 release candidate 1.
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