I happen to randomly notice this sometimes while compiling, and I figure I may as well fix it when I have nothing else to do until the full recompile finishes.
Created attachment 645226 [details] [diff] [review]
Picked a reviewer out of my hat. I'll push it to try along with something else so as not to waste try resources.
Pushed to try with another patch: https://tbpl.mozilla.org/?tree=Try&rev=ddeecf8aff59