[PATCH] D118945: [lld-macho] Minor clean up: use .find() to check for key existence rather than [], which would create a new entry.

[Vy Nguyen via Phabricator via llvm-commits]

oontvoo added a comment.

In D118945#3295074 <https://reviews.llvm.org/D118945#3295074>, @keith wrote:

> Thanks I wasn't aware of this, but it looks like this was the only one doing this.

Yeah I hadn't noticed this until I ran this code with a readlock (not a write lock) and got a crash due to concurrent writes.


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https://reviews.llvm.org/D118945