Getting action on your favorite D issues (2021)

[ag0aep6g]

About half a year ago, Walter made a thread about "Getting action on 
your favorite D issues"[1]. There, he suggested to "keep a list of 
bugzilla issue links" and "bring them up now and then". I replied with 
my top five at the time.

Let's see what progress was made on my favorite bugs:


> 1) The DIP 1000 implementation has a glaring accepts-invalid bug with `pure` functions.
> https://issues.dlang.org/show_bug.cgi?id=20150

I've made a DMD pull request that competes with Walter's, but neither of 
them is going anywhere, because fixing Phobos is a chore.


> 2) "bool can be both true and false"
> https://issues.dlang.org/show_bug.cgi?id=20148

There was some discussion, but nothing of substance came from it.


> 3) DMD's codegen for the BT (bit test) instruction is all kinds of wrong.
> https://issues.dlang.org/show_bug.cgi?id=18750

Most of the sub-issues have been fixed. Walter's pull requests came 
shortly after the forum thread. Bringing the issue up seems to have 
worked. One sub-issue is still open, though. So this is not fully fixed yet.


> 4) "import doesn't verify module declaration"
> https://issues.dlang.org/show_bug.cgi?id=15086

No progress at all.


> 5) std.stdio tries converting between different UTF variants, but fails horribly.
> https://issues.dlang.org/show_bug.cgi?id=18789 and
> https://issues.dlang.org/show_bug.cgi?id=18801

Fixed by myself.


Since one issue has been fixed, I'm adding a new #5 to round out my 
favorites:

5) `immutable delegate()` and `immutable delegate() immutable` are 
considered equal but treated differently

https://issues.dlang.org/show_bug.cgi?id=16058

In a nutshell:

     void main()
     {
         int x = 1;
         immutable void delegate() dg1 = { ++x; };
         immutable void delegate() immutable dg2 = { ++x; };
             /* How does this line compile? */
     }


[1] https://forum.dlang.org/post/rbeab9$20l1$1@digitalmars.com