Bug path

test_3
‘test_3’: events 1-2
143 free (ptr);
^~~~~~~~~~
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(1) first ‘free’ here
144 called_by_test_3 ();
145 free (ptr); /* { dg-warning "double-'free' of 'ptr'" } */
~~~~~~~~~~
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(2) second ‘free’ here; first ‘free’ was at (1)