Bug path

‘test_2’: events 1-4
83void test_2 (void *ptr, int a, int b)
^~~~~~
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(1) entry to ‘test_2’
84{
85 switch (a)
~~~~~~
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(2) following ‘case 3:’ branch...
[...]
91 case 3:
~~~~
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(3) ...to here
92 calls_free_2 (ptr);
~~~~~~~~~~~~~~~~~~
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(4) calling ‘calls_free_2’ from ‘test_2’
‘calls_free_2’: events 5-6
78void calls_free_2 (void *ptr)
^~~~~~~~~~~~
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(5) entry to ‘calls_free_2’
79{
80 free (ptr); /* { dg-warning "double-'free' of 'ptr'" } */
~~~~~~~~~~
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(6) first ‘free’ here
‘test_2’: events 7-10
92 calls_free_2 (ptr);
^~~~~~~~~~~~~~~~~~
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(7) returning to ‘test_2’ from ‘calls_free_2’
[...]
96 switch (b)
~~~~~~
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(8) following ‘default:’ branch...
97 {
98 default:
~~~~~~~
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(9) ...to here
99 calls_free_2 (ptr);
~~~~~~~~~~~~~~~~~~
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(10) passing freed pointer ‘ptr’ in call to ‘calls_free_2’ from ‘test_2’
‘calls_free_2’: events 11-12
78void calls_free_2 (void *ptr)
^~~~~~~~~~~~
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(11) entry to ‘calls_free_2’
79{
80 free (ptr); /* { dg-warning "double-'free' of 'ptr'" } */
~~~~~~~~~~
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(12) second ‘free’ here; first ‘free’ was at (6)