Issue with enzyme_runtime_activity flag

[ebchin]

I was trying to use Enzyme to differentiate through a complicated function and noticed the derivative with the debug and release builds differed. I tried the enzyme_runtime_activity flag mentioned here: https://enzyme.mit.edu/julia/stable/faq/#Runtime-Activity and now the code is segfaulting when computing the derivatives.

Here's a reproducer on compiler explorer: https://fwd.gymni.ch/eOdswZ