Internally, during creation of `SamType` the compiler checks if a
parameter is really can be used as a SAM, so this check involves
lookup for abstract members, which can force additional computation of
member scopes. This is totally fine for BE but it can be dangerous
for light classes computation when not all scopes are processed.
Note that this issue appeared quite recently after 16f175612e
#KT-40869 Fixed
Mikhail Zarechenskiy
2eb17df962