Add regression test

Closes sympy/sympy#23855
diofant · Jul 31, 2022 · c055d24 · c055d24
1 parent 202500a
commit c055d24
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diff --git a/diofant/tests/solvers/test_solvers.py b/diofant/tests/solvers/test_solvers.py
@@ -1766,3 +1766,7 @@ def test_sympyissue_23637():
            {x: -2.0, y: -1.0}, {x: 1.3235849477227735, y: -0.32419504840343982},
            {x: 3.0040159362898193, y: -1.0015924793400075}, {x: 5.0, y: -4.0}]
     assert solve([rea1, rea2], x, y) == sol
+
+
+def test_sympyissue_23855():
+    assert solve([x - 1], x, x) == [{x: 1}]
diff --git a/docs/release/notes-0.14.rst b/docs/release/notes-0.14.rst
@@ -95,3 +95,4 @@ These Sympy issues also were addressed:
 * :sympyissue:`23677`: minimal_polynomial fails for very complicated algebraic number
 * :sympyissue:`23836`: Incorrect results for limits of Piecewise at discontinuity
 * :sympyissue:`23845`: Gruntz should have been free of _w, value error, recursion error
+* :sympyissue:`23855`: linsolve gives odd result if symbols are duplicated