> Not sure what you are trying to achieve, but "changed from" is a
> supported operator for the custom search, so might be worth a look if
> you didn't already. Additionally, you have AND and OR available.
I've already tried custom search and known that "changed from" op exists.
My questions is why "change history" doesn't support the search for empty string or regexp.
For examples, let's say we want to find bugs whose Group is like "blah-core-security".
I thought "Group | contains the string | core-security" is enough for it, but I got no result.
Btw, "Group | changed from | core-security" gives me some results.
SInce I don't have entire list of "blah-core-security", I wanted to search with like "Group | changed from the string which contains the string | core-sec".