Use IP based CallStack in error and undefined

This patch modifies `error`, `undefined`, and `assertError` to use
implicit call-stacks to provide better error messages to users.

There are a few knock-on effects:

- `GHC.Classes.IP` is now wired-in so it can be used in the wired-in
  types for `error` and `undefined`.

- `TysPrim.tyVarList` has been replaced with a new function
  `TysPrim.mkTemplateTyVars`. `tyVarList` made it easy to introduce
  subtle bugs when you need tyvars of different kinds. The naive

  ```
  tv1 = head $ tyVarList kind1
  tv2 = head $ tyVarList kind2
  ```

  would result in `tv1` and `tv2` sharing a `Unique`, thus substitutions
  would be applied incorrectly, treating `tv1` and `tv2` as the same
  tyvar. `mkTemplateTyVars` avoids this pitfall by taking a list of kinds
  and producing a single tyvar of each kind.

- The types `GHC.SrcLoc.SrcLoc` and `GHC.Stack.CallStack` now live in
  ghc-prim.

- The type `GHC.Exception.ErrorCall` has a new constructor
  `ErrorCallWithLocation` that takes two `String`s instead of one, the
  2nd one being arbitrary metadata about the error (but usually the
  call-stack). A bi-directional pattern synonym `ErrorCall` continues to
  provide the old API.

Updates Cabal, array, and haddock submodules.

Reviewers: nh2, goldfire, simonpj, hvr, rwbarton, austin, bgamari

Reviewed By: simonpj

Subscribers: rwbarton, rodlogic, goldfire, maoe, simonmar, carter,
liyang, bgamari, thomie

Differential Revision: https://phabricator.haskell.org/D861

GHC Trac Issues: #5273

1 files changed, 0 insertions, 0 deletions

diff --git a/libraries/array b/libraries/array
-Subproject 68323b26865ec86a53237ca8974e82bf406a971
+Subproject 2f5b772f4475d70a68c6f9d10390ac9812afdb7