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@dmalcolm:
As for the gdb example, you need to add --eval-command="set _Py_HashSecret_Initialized=1", otherwise _Py_HashSecret will get overwritten immediately after it is set by gdb, either to 0 if run without the -R switch, or to a random value.
With the fresh pair of values Vlado provided, I managed to reproduce the collisions on Python 2.7.3, i686 (output trimmed like you did):
for __PREFIX in 0x0 0x4700 0xdead00 0xcafe00; do gdb --eval-command="break _PyRandom_Init" --eval-command="run" --eval-command="print _Py_HashSecret" --eval-command="set _Py_HashSecret.prefix=${__PREFIX}" --eval-command="set _Py_HashSecret_Initialized=1" --eval-command="print _Py_HashSecret" --eval-command="continue" -eval-command="continue" --args ./python -c "a='\x00\xcf\x0b\x96\x19'; b='\x00\x6d\x29\x45\x18'; print(hash(a)); print(hash(b))"; done
1ドル = {prefix = 0, suffix = 0}
2ドル = {prefix = 0, suffix = 0}
Continuing.
1220138288
1220138288
1ドル = {prefix = 0, suffix = 0}
2ドル = {prefix = 18176, suffix = 0}
Continuing.
-1483212240
-1483212240
1ドル = {prefix = 0, suffix = 0}
2ドル = {prefix = 14593280, suffix = 0}
Continuing.
-972665808
-972665808
1ドル = {prefix = 0, suffix = 0}
2ドル = {prefix = 13303296, suffix = 0}
Continuing.
1003122480
1003122480