fommy_hashlin_done: warning: free called on pointer with nonzero offset

[Jon Ringle]

I am seeing the following compiler warning:

c_src/tommyds/src/tommyhashlin.c: In function ‘tommy_hashlin_done’:
c_src/tommyds/src/tommytypes.h:102:20: warning: ‘free’ called on pointer ‘*(tommy_hashlin_node ***)((char *)hashlin+ ivtmp*8)’ with nonzero offset [512, 17179869184] [-Wfree-nonheap-object]
  102 | #define tommy_free free
c_src/tommyds/src/tommyhashlin.c:82:17: note: in expansion of macro ‘tommy_free’
   82 |                 tommy_free(&segment[((tommy_ptrdiff_t)1) << i]);
      |                 ^~~~~~~~~~

[Andrea Mazzoleni]

Hi Jon,

I checked the code and it's right. It looks like as a false positive warning from the compiler.

What compiler and version is it ?

Ciao,
Andrea

[Jon Ringle]

gcc (Ubuntu 11.4.0-2ubuntu1~20.04) 11.4.0