Bug path

‘test_28’: events 1-3
314 struct coord *p = NULL;
^
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(1) ‘p’ is NULL
315 p->x = 0.f; /* { dg-warning "dereference of NULL 'p'" } */
~~~~~~~~~~
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(3) dereference of NULL ‘p’
[...]
320 return p;
~
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(2) ‘p’ is NULL