HaskellExtr: Add type annotations to Prelude.==

Also `Export ExtrHaskellBasic` in `ExtrHaskellString`.

Fixes #12257
Fixes #12258

1 files changed, 9 insertions, 0 deletions

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).