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--- a/ext/spl/spl_fixedarray.c
+++ b/ext/spl/spl_fixedarray.c
@@ -158,6 +158,9 @@ static HashTable* spl_fixedarray_object_
zend_hash_index_update(intern->std.properties, i, (void *)&intern->array->elements[i], sizeof(zval *), NULL);
Z_ADDREF_P(intern->array->elements[i]);
} else {
+ if (GC_G(gc_active)) {
+ return NULL;
+ }
zend_hash_index_update(intern->std.properties, i, (void *)&EG(uninitialized_zval_ptr), sizeof(zval *), NULL);
Z_ADDREF_P(EG(uninitialized_zval_ptr));
}
--- /dev/null
+++ b/ext/spl/tests/bug52573.phpt
@@ -0,0 +1,12 @@
+--TEST--
+Bug #52573 (SplFileObject::fscanf Segmentation fault)
+--FILE--
+<?php
+
+$result = null;
+$f = new SplFileObject(__FILE__, 'r');
+$f->fscanf('<?php // %s', $result);
+
+?>
+--EXPECTF--
+Warning: Parameter 3 to fscanf() expected to be a reference, value given in %s on line 5
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