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In #572 we discovered that on glibc 2.17 (notably, CentOS 7) there appears to be some surprising behavior around dropping the
libloading::os::unix::Library
structures, theDrop
implementation callsdlclose
which is... notably a "challenged" call.This these structures are already used for the remaining duration of the
cargo-pgx
binary execution, there is no harm in keeping them around until they can be part of the normal program drops on exit instead. This avoids the issue sufficiently in my testing.