This error occurred in our test suite which uses JET. @Drvi notes:
The crux of the issue is that LoweredCodeUtils changed a method signature of add_control_flow! in this PR (the last arg of add_control_flow! used to be a BitSet which is what JET does). It seems that add_control_flow! is an unexported function, so JET is basically touching internals of this package so semver didn’t guard us here.
This error occurred in our test suite which uses JET. @Drvi notes: