Add regression test

Closes sympy/sympy#21167
skirpichev · Mar 28, 2021 · fe548b4 · fe548b4
1 parent 80c5b28
commit fe548b4
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diff --git a/diofant/tests/solvers/test_solvers.py b/diofant/tests/solvers/test_solvers.py
@@ -1677,3 +1677,7 @@ def test_unrad2():
 
 def test_sympyissue_20610():
     assert solve([x + y, sqrt(2)], [x, y]) == []
+
+
+def test_sympyissue_21167():
+    assert solve(cbrt(x - 1) + cbrt(x) + cbrt(x + 1)) == []
diff --git a/docs/release/notes-0.13.rst b/docs/release/notes-0.13.rst
@@ -61,3 +61,4 @@ These Sympy issues also were addressed:
 * :sympyissue:`21107`: S.Infinity.is_nonzero returns False
 * :sympyissue:`21132`: Integral with parametres: wrong and too long result
 * :sympyissue:`21180`: Bug: sympy.factor doesn't work for Poly !!!
+* :sympyissue:`21167`: Empty list of solutions returned for equation with cubic roots