diff --git a/Zend/tests/bug71275.phpt b/Zend/tests/bug71275.phpt
new file mode 100644
index 00000000000..52443734b76
--- /dev/null
+++ b/Zend/tests/bug71275.phpt
@@ -0,0 +1,27 @@
+--TEST--
+Bug #71275 (Bad method called on cloning an object having a trait)
+--FILE--
+<?php
+
+trait MyTrait {
+	public function _() {
+		throw new RuntimeException('Should not be called');
+	}
+}
+
+
+class MyClass {
+	use MyTrait;
+
+	public function __clone() {
+		echo "I'm working hard to clone";
+	}
+}
+
+
+$instance = new MyClass();
+clone $instance;
+
+?>
+--EXPECT--
+I'm working hard to clone
diff --git a/Zend/zend_inheritance.c b/Zend/zend_inheritance.c
index cf7688e8e47..ce7dd990265 100644
--- a/Zend/zend_inheritance.c
+++ b/Zend/zend_inheritance.c
@@ -1028,34 +1028,34 @@ static zend_bool zend_traits_method_compatibility_check(zend_function *fn, zend_
 
 static void zend_add_magic_methods(zend_class_entry* ce, zend_string* mname, zend_function* fe) /* {{{ */
 {
-	if (!strncmp(ZSTR_VAL(mname), ZEND_CLONE_FUNC_NAME, ZSTR_LEN(mname))) {
+	if (zend_string_equals_literal(mname, ZEND_CLONE_FUNC_NAME)) {
 		ce->clone = fe; fe->common.fn_flags |= ZEND_ACC_CLONE;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_CONSTRUCTOR_FUNC_NAME, ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_CONSTRUCTOR_FUNC_NAME)) {
 		if (ce->constructor && (!ce->parent || ce->constructor != ce->parent->constructor)) {
 			zend_error_noreturn(E_COMPILE_ERROR, "%s has colliding constructor definitions coming from traits", ZSTR_VAL(ce->name));
 		}
 		ce->constructor = fe; fe->common.fn_flags |= ZEND_ACC_CTOR;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_DESTRUCTOR_FUNC_NAME,  ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_DESTRUCTOR_FUNC_NAME)) {
 		ce->destructor = fe; fe->common.fn_flags |= ZEND_ACC_DTOR;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_GET_FUNC_NAME, ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_GET_FUNC_NAME)) {
 		ce->__get = fe;
 		ce->ce_flags |= ZEND_ACC_USE_GUARDS;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_SET_FUNC_NAME, ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_SET_FUNC_NAME)) {
 		ce->__set = fe;
 		ce->ce_flags |= ZEND_ACC_USE_GUARDS;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_CALL_FUNC_NAME, ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_CALL_FUNC_NAME)) {
 		ce->__call = fe;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_UNSET_FUNC_NAME, ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_UNSET_FUNC_NAME)) {
 		ce->__unset = fe;
 		ce->ce_flags |= ZEND_ACC_USE_GUARDS;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_ISSET_FUNC_NAME, ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_ISSET_FUNC_NAME)) {
 		ce->__isset = fe;
 		ce->ce_flags |= ZEND_ACC_USE_GUARDS;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_CALLSTATIC_FUNC_NAME, ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_CALLSTATIC_FUNC_NAME)) {
 		ce->__callstatic = fe;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_TOSTRING_FUNC_NAME, ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_TOSTRING_FUNC_NAME)) {
 		ce->__tostring = fe;
-	} else if (!strncmp(ZSTR_VAL(mname), ZEND_DEBUGINFO_FUNC_NAME, ZSTR_LEN(mname))) {
+	} else if (zend_string_equals_literal(mname, ZEND_DEBUGINFO_FUNC_NAME)) {
 		ce->__debugInfo = fe;
 	} else if (ZSTR_LEN(ce->name) == ZSTR_LEN(mname)) {
 		zend_string *lowercase_name = zend_string_tolower(ce->name);
diff --git a/main/main.c b/main/main.c
index dfba949351c..77a2f64b40a 100644
--- a/main/main.c
+++ b/main/main.c
@@ -723,9 +723,20 @@ PHPAPI ZEND_COLD void php_verror(const char *docref, const char *params, int typ
 
 	if (PG(html_errors)) {
 		replace_buffer = php_escape_html_entities((unsigned char*)buffer, buffer_len, 0, ENT_COMPAT, NULL);
+		/* Retry with substituting invalid chars on fail. */
+		if (!replace_buffer || ZSTR_LEN(replace_buffer) < 1) {
+			replace_buffer = php_escape_html_entities((unsigned char*)buffer, buffer_len, 0, ENT_COMPAT | ENT_HTML_SUBSTITUTE_ERRORS, NULL);
+		}
+
 		efree(buffer);
-		buffer = ZSTR_VAL(replace_buffer);
-		buffer_len = (int)ZSTR_LEN(replace_buffer);
+
+		if (replace_buffer) {
+			buffer = ZSTR_VAL(replace_buffer);
+			buffer_len = (int)ZSTR_LEN(replace_buffer);
+		} else {
+			buffer = "";
+			buffer_len = 0;
+		}
 	}
 
 	/* which function caused the problem if any at all */
@@ -878,7 +889,9 @@ PHPAPI ZEND_COLD void php_verror(const char *docref, const char *params, int typ
 	if (replace_buffer) {
 		zend_string_free(replace_buffer);
 	} else {
-		efree(buffer);
+		if (buffer_len > 0) {
+			efree(buffer);
+		}
 	}
 
 	php_error(type, "%s", message);
diff --git a/tests/basic/bug71273.phpt b/tests/basic/bug71273.phpt
new file mode 100644
index 00000000000..d0cd72577ec
--- /dev/null
+++ b/tests/basic/bug71273.phpt
@@ -0,0 +1,21 @@
+--TEST--
+Bug #71273 A wrong ext directory setup in php.ini leads to crash
+--SKIPIF--
+<?php
+	if ("cli" != php_sapi_name()) {
+		die("skip CLI only");
+	}
+?>
+--FILE--
+<?php
+	/* NOTE this file is required to be encoded in iso-8859-1 */
+
+	$cmd = getenv('TEST_PHP_EXECUTABLE') . " -n -d html_errors=on -d extension_dir=a/é/w -d extension=php_kartoffelbrei.dll -v 2>&1";
+	$out = shell_exec($cmd);
+
+	var_dump(preg_match(",.+a[\\/].+[\\/]w.php_kartoffelbrei.dll.+,s", $out));
+?>
+==DONE==
+--EXPECTF--
+int(1)
+==DONE==