Fix #77291: magic methods inherited from a trait may be ignored

When adding methods from a trait, we must not assume that a method name
with the same length as the name of the using class is either a PHP 4
style constructor, or not a magic method at all – it may well be
another magic method.

We mostly preserve the spirit of the optimization which caused this
regression, and avoid string comparisons for all method names which can
never be magic methods.

1 files changed, 12 insertions, 12 deletions

diff --git a/Zend/zend_inheritance.c b/Zend/zend_inheritance.c
index 3a1497da7b..f3b62ef7e5 100644
--- a/Zend/zend_inheritance.c
+++ b/Zend/zend_inheritance.c
@@ -1126,18 +1126,7 @@ 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 (ZSTR_LEN(ce->name) == ZSTR_LEN(mname)) {
-		zend_string *lowercase_name = zend_string_tolower(ce->name);
-		lowercase_name = zend_new_interned_string(lowercase_name);
-		if (!memcmp(ZSTR_VAL(mname), ZSTR_VAL(lowercase_name), ZSTR_LEN(mname))) {
-			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;
-		}
-		zend_string_release_ex(lowercase_name, 0);
-	} else if (ZSTR_VAL(mname)[0] != '_' || ZSTR_VAL(mname)[1] != '_') {
+	if (ZSTR_LEN(ce->name) != ZSTR_LEN(mname) && (ZSTR_VAL(mname)[0] != '_' || ZSTR_VAL(mname)[1] != '_')) {
 		/* pass */
 	} else if (zend_string_equals_literal(mname, ZEND_CLONE_FUNC_NAME)) {
 		ce->clone = fe;
@@ -1168,6 +1157,17 @@ static void zend_add_magic_methods(zend_class_entry* ce, zend_string* mname, zen
 		ce->__tostring = fe;
 	} 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);
+		lowercase_name = zend_new_interned_string(lowercase_name);
+		if (!memcmp(ZSTR_VAL(mname), ZSTR_VAL(lowercase_name), ZSTR_LEN(mname))) {
+			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;
+		}
+		zend_string_release_ex(lowercase_name, 0);
 	}
 }
 /* }}} */