CI failures on Darwin

We see lots of

+
+<no location info>:
+    warning: Couldn't figure out C compiler information!
+             Make sure you're using GNU gcc, or clang

in the x86_64-darwin a lot. Which seems to be due to running out of memory(?) though I don't understand why.

Maybe test with make test vs. hadrian test?

Edited May 31, 2021 by Ben Gamari

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