You know how I was saying in my DConf talk...

[Kagamin]

On Tuesday, 23 July 2019 at 18:36:19 UTC, Ethan wrote:
> They've most definitely improved since DDMD happened, but they 
> still seem predicated on the idea that people aren't going to 
> be doing a lot of metaprogramming and provide almost no context 
> when you're deep down the meta hole.

The compiler on run.dlang.org provides plenty of context:

/dlang/dmd/linux/bin64/../../src/phobos/std/traits.d(482): Error: 
local scope __anonymous is not a variable
/dlang/dmd/linux/bin64/../../src/phobos/std/traits.d(580): Error: 
template instance `std.traits.parentOf!(StructOne)` error 
instantiating
onlineapp.d(16):        instantiated from here: 
moduleName!(StructOne)
onlineapp.d(16):        while evaluating pragma(msg, 
moduleName!(StructOne))

It provides instantiation stack and all line numbers where error 
occurs.