Re: [bash-bug] Can arithmetic evaluation trap more than just division by zero?

[Andreas Schwab]

"Dr. Werner Fink" <werner@suse.de> writes:

> On x86_64 the gdb shows:
>
>  Program received signal SIGFPE, Arithmetic exception.
>  0x0000000000462cd5 in exp2 () at expr.c:761
>  761             val1 /= val2;
>  (gdb) print val1
>  $1 = -9223372036854775808
>  (gdb) print val2
>  $2 = -1
>
> which is strange.

Not at all.  Overflow invokes undefined behaviour.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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