dc hitting a compiler bug, or undefined behavior

[Lauri Kasanen]

Hi,

I'm seeing busybox dc acting funny when compiled with some versions of
gcc. This is on busybox git. The x86 binary busybox_unstripped and
config are attached.

gcc 4.2.2 - ok
gcc 4.7.2:
nc 10 1 add p
2.738e+93

So either bb is hitting a compiler bug, or undefined behavior somewhere
with new gcc's more aggressive optimizations.

- Lauri

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