Bug path

‘test_13’: events 1-4
134 void *p = malloc (1024); /* { dg-message "allocated here" } */
^~~~~~~~~~~~~
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(1) allocated here
[...]
138 if (!q)
~
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(2) following ‘true’ branch (when ‘q’ is NULL)...
139 {
140 free (q);
~~~~~~~~
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(3) ...to here
141 return; /* { dg-warning "leak of 'p'" } */
~~~~~~
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(4) ‘p’ leaks here; was allocated at (1)