regex with ICU crashes with named sub-expressions

[anonymous]

In "icu.hpp" regex match/search wrappers use internal match_results object instead of the one passed in the args. On success the results are copied, but the named sub-expressions pointer (shared with the regex object) is not copied. This pointer is not checked for validity in the methods accessing named sub-expressions.
Client code using named sub-expressions will crash with ICU wrappers (but work fine without them).

[zhivkot@…]

Also to add that my current workaround is to use implementation specific public methods to set the named sub-expressions pointer: myMatchResults.set_named_subs( myU32regex.get_named_subs() );

[John Maddock]

Thanks for this, fixed in ​https://github.com/boostorg/regex/commit/5c543a8e2b88e17607885a6cc23466328c6e0e5f