Hi all, I'm working on a little TC plugin that solves the following class:
```haskell
class KnownAnnotations where
rawAnnotationsVal :: [Annotation]
```
Like `HasCallStack`, the result of `KnownAnnotations` is unique to each
callsite. Thus, I am trying to prevent my TC plugin from adding the
solved constraint to the inert set.
As an example, the following program:
```
t2 :: ([Annotation], Int)
t2 = (rawAnnotationsVal, test2)
t3 :: ([Annotation], Int)
t3 = (rawAnnotationsVal, test3)
```
dumps this output with `-ddump-cs-trace`:
```
Step 1[l:0,d:0] Kept as inert:
[WD] $dKnownAnnotations_a18UB {0}:: KnownAnnotations
Step 2[l:0,d:0] Dict equal (keep inert):
[WD] $dKnownAnnotations_a18UD {0}:: KnownAnnotations
```
Is there some trick to prevent the inert caching for these solved
wanteds?
Cheers,
Sandy
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