=over =item ${^SAFE_LOCALES} X<${^SAFE_LOCALES}> Reflects if safe locale operations are available to this perl (when the value is 1) or not (the value is 0). This variable is always 1 if the perl has been compiled without threads. It is also 1 if this perl is using thread-safe locale operations. Note that an individual thread may choose to use the global locale (generally unsafe) by calling L. This variable currently is still set to 1 in such threads. This variable is read-only. This variable was added in Perl v5.28.0. =back