Bug path

test_3
‘test_3’: events 1-2
7 int *ptr = (int *)malloc (sizeof (int)); /* { dg-line malloc } */
^~~~~~~~~~~~~~~~~~~~~
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(1) this call could return NULL
8 *ptr = 42; /* { dg-line unchecked_deref } */
~~~~~~~~~
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(2) ‘ptr’ could be NULL: unchecked value from (1)