Handle resource keys in constexpr arrays

Zend/tests/const_array_with_resource_key.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Constexpr arrays should be able to handle resource keys
+--FILE--
+<?php
+
+const FOO = [STDIN => 42];
+var_dump(FOO);
+
+?>
+--EXPECTF--
+Strict Standards: Resource ID#%d used as offset, casting to integer (%d) in %s on line %d
+array(1) {
+  [%d]=>
+  int(42)
+}

Zend/zend_compile.c

@@ -5940,6 +5940,9 @@ void zend_do_add_static_array_element(zval *result, zval *offset, zval *expr) /*
 			case IS_NULL:
 				zend_symtable_update(Z_ARRVAL_P(result), "", 1, &expr, sizeof(zval *), NULL);
 				break;
+			case IS_RESOURCE:
+				zend_error(E_STRICT, "Resource ID#%ld used as offset, casting to integer (%ld)", Z_LVAL_P(offset), Z_LVAL_P(offset));
+				/* break missing intentionally */
 			case IS_LONG:
 			case IS_BOOL:
 				zend_hash_index_update(Z_ARRVAL_P(result), Z_LVAL_P(offset), &expr, sizeof(zval *), NULL);