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Furnishes general guidance for airport employees, airport management, and other personnel responsible for aircraft rescue and firefighting (ARFF) operations at the scene of an aircraft accident on the proper preservation of evidence. It explains the need for preservation of evidence and details operational actions which may be permitted if performed in the interest of preserving life.

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# Breakpoint 1, _siftup (heap=0x4056b344, pos=65534) at /home/p/Python-3.4.1/Modules/_heapqmodule.c:121 # warning: Source file is more recent than executable. # 121 Py_DECREF(PyList_GET_ITEM(heap, pos)); # (gdb) print *heap->ob_item[pos] # $1 = {_ob_next = 0x41812058, _ob_prev = 0x831159c , ob_refcnt = 1, ob_type = 0x4058fd1c} # (gdb) n # 122 PyList_SET_ITEM(heap, pos, newitem); # (gdb) print *heap->ob_item[pos] # Cannot access memory at address 0x3fff8 # (gdb) print *heap # $2 = {ob_base = {ob_base = {_ob_next = 0x4059c0b4, _ob_prev = 0x405903b4, ob_refcnt = 2, ob_type = 0x830e1c0 }, # ob_size = 0}, ob_item = 0x0, allocated = 0} # (gdb) n # # Program received signal SIGSEGV, Segmentation fault. # 0x4002f150 in _siftup (heap=0x4056b344, pos=65534) at /home/p/Python-3.4.1/Modules/_heapqmodule.c:122 # 122 PyList_SET_ITEM(heap, pos, newitem);

New changeset 813854f49f9d by Raymond Hettinger in branch '3.4': Issues bpo-24099, bpo-24100, and bpo-24101: Fix free-after-use bug in heapq. https://hg.python.org/cpython/rev/813854f49f9d

New changeset d356e68de236 by Raymond Hettinger in branch '2.7': Issues bpo-24099, bpo-24100, and bpo-24101: Fix free-after-use bug in heapq. https://hg.python.org/cpython/rev/d356e68de236

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