[API CHANGES]
An attribute in a subclass can now override the value of "is". (doy)
The deprecation warnings for alias and excludes have been turned back off
for this release, to give other module authors a chance to tweak their
code. (Dave Rolsky)
[BUG FIXES]
mro::get_linear_isa was being called as a function rather than a method,
which caused problems with Perl 5.8.x. (t0m)Union types always created a type constraint, even if their constituent
constraints did not have any coercions. This bogus coercion always
returned undef, which meant that a union which included Undef as a member
always coerced bad values to undef. Reported by Eric Brine. RT
#58411. (Dave Rolsky)Union types with coercions would always fall back to coercing the value to
undef (unintentionally). Now if all the coercions for a union type fail,
the value returned by the coercion is the original value that we attempted
to coerce. (Dave Rolsky).