From ffe7c11df6b6aac676498b09c63fc03db650ea8b Mon Sep 17 00:00:00 2001
From: Jason Gross
Date: Wed, 6 May 2020 11:54:55 -0400
Subject: HaskellExtr: Add type annotations to Prelude.==

Also `Export ExtrHaskellBasic` in `ExtrHaskellString`.

Fixes #12257
Fixes #12258
---
 .../10-standard-library/12263-fix-haskell-extraction.rst         | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 doc/changelog/10-standard-library/12263-fix-haskell-extraction.rst

(limited to 'doc')

diff --git a/doc/changelog/10-standard-library/12263-fix-haskell-extraction.rst b/doc/changelog/10-standard-library/12263-fix-haskell-extraction.rst
new file mode 100644
index 0000000000..c80a070181
--- /dev/null
+++ b/doc/changelog/10-standard-library/12263-fix-haskell-extraction.rst
@@ -0,0 +1,9 @@
+- **Fixed:**
+  In Haskell extraction with ``ExtrHaskellString``, equality comparisons on
+  strings and characters are now guaranteed to be uniquely well-typed, even in
+  very polymorphic contexts under ``unsafeCoerce``; this is achieved by adding
+  type annotations to the extracted code, and by making ``ExtrHaskellString``
+  export ``ExtrHaskellBasic`` (`#12263
+  <https://github.com/coq/coq/pull/12263>`_, fixes `#12257
+  <https://github.com/coq/coq/issues/12257>`_ and `#12258
+  <https://github.com/coq/coq/issues/12258>`_, by Jason Gross).
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