fix crash on finalization for logical_type from get_value_type #135
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Fix a crash caused by destroying the
logical_type
returned byget_value_type
in the finalizer for the returned External. Apparently, unlike all otherlogical_type
s returned by the C API, this one must not be explicitly destroyed; it's tied to the lifetime of the value.This was the cause of the frequent but inconsistent failures in the bindings tests for Windows. Probably it was only happening on Windows and not the other platforms due to timing differences. I re-enabled the Windows tests.