DMD backend quality (Was: Re: DIP 1031--Deprecate Brace-Style Struct Initializers--Community Review Round 1 Discussion)

[Mathias Lang]

On Monday, 17 February 2020 at 02:54:09 UTC, Walter Bright wrote:
> On 2/16/2020 6:07 PM, Mathias Lang wrote:
>> (DWARF debug infos are completely broken on OSX),
> I hear this now and then about the DWARF output, but there are 
> ZERO bug reports on it.
>
> I use gdb myself on OSX and Linux, and while I don't much care 
> for gdb, it works.

Really ?

- I mentioned last time in the Skype meeting;
- we put a bounty on it (blog post: 
https://dlang.org/blog/2019/08/17/bug-bounties-have-arrived/ and 
bounty itself: 
https://www.flipcause.com/secure/cause_pdetails/NjI2NjQ=)
- there is a bugzilla issue: 
https://issues.dlang.org/show_bug.cgi?id=20460
- I opened a PR detailing the issue in great details: 
https://github.com/dlang/dmd/pull/10722

And people are not going to mention "DWARF" in bugzilla, they're 
going to say "stack traces are broken but I can't reproduce with 
a small example" (in this case it depends on the order the root 
modules are passed to the compiler). I was lucky to be familiar 
enough with the compiler to notice the pattern, but it did take 
me a while.

Also which OS version / gdb version are you using ? On a 
relatively recent Mac, GDB barely works and LLDB is a much better 
place to get started.