DocBlockTypeResolver throws InvalidArgumentException with mixed and union type annotation

[gam6itko]

Q	A
Bug report?	yes
Feature request?	no
BC Break report?	no
RFC?	no

As I said in #1295, I have json type field $value. It marked as mixed type in annotation.

class MegaClass 
{
    /**
     * @var mixed
     */
    private $value;
}

With 3.12.1 executing of cache:warmup throws Can't use incorrect type mixed for collection in MegaClass:value

If I change the annotation to union type it will throws another exception Can't use union type array|int|bool|null for collection in MegaClass:value

class MegaClass 
{
    /**
     * @var array|int|bool|null
     */
    private $value;
}

I believe @dgafka can fix it

[goetas]

done in #1330

[fvozar]

Hi @goetas, is there any date planned for the bug fix release?