Check for empty string before trying to evaluate in _element_constructor

sagemath · May 4, 2023 · d32725b · d32725b
1 parent 4140517
commit d32725b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/sage/rings/complex_mpfr.pyx b/src/sage/rings/complex_mpfr.pyx
@@ -517,7 +517,7 @@ class ComplexField_class(sage.rings.abc.ComplexField):
                 x = x.replace('j', 'I')
                 x = x.replace('E', 'e')
                 allowed = '+-.*0123456789Ie'
-                if not all(letter in allowed for letter in x):
+                if len(x) == 0 or not all(letter in allowed for letter in x):
                     raise ValueError(f'given string {x!r} is not a complex number')
                 # This should rather use a proper parser to validate input.
                 # TODO: this is probably not the best and most