Import unsafePerformIO from System.IO.Unsafe
Import unsafePerformIO from System.IO.Unsafe

Silences deprecation warnings of the form,

    In the use of `unsafePerformIO' (imported from Foreign):
    Deprecated: "Use System.IO.Unsafe.unsafePerformIO instead; This function will be removed in the next release"

bgamari/regex-pcre-builtin,bgamari/regex-pcre-builtin