[PATCH] D157948: [NFC]Fix possibly deref nullptr

[Wang, Xin via Phabricator via llvm-commits]

XinWang10 added a comment.

In D157948#4587289 <https://reviews.llvm.org/D157948#4587289>, @skan wrote:

> Is this a NFC change or a bug fix? If NFC, shouldn't we use assert?

cast could use assert internally, I think it's same to explicit assert.


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