gh-156865: correctly detect overflows for array's "e" type code

Lib/test/test_array.py

@@ -1607,6 +1607,12 @@ class HalfFloatTest(FPTest, unittest.TestCase):
     typecode = 'e'
     minitemsize = 2
 
+    def test_overflows(self):
+        # Overflows half-float type:
+        self.assertRaises(OverflowError, array.array, self.typecode, [123456])
+        # Overflows also float type:
+        self.assertRaises(OverflowError, array.array, self.typecode, [1e300])
+
 class FloatTest(FPTest, unittest.TestCase):
     typecode = 'f'
     minitemsize = 4

Misc/NEWS.d/next/Library/2026-09-03-04-51-46.gh-issue-156864.Pbe7Tl.rst

@@ -0,0 +1,2 @@
+:func:`array.array` setter now correctly detects overflows for the ``'e'``
+type code.  Patch by Sergey B Kirpichev.

Modules/arraymodule.c

@@ -584,8 +584,8 @@ e_getitem(arrayobject *ap, Py_ssize_t i)
 static int
 e_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
 {
-    float x;
-    if (!PyArg_Parse(v, "f;array item must be float", &x)) {
+    double x;
+    if (!PyArg_Parse(v, "d;array item must be float", &x)) {
         return -1;
     }