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From: | Roman Rakus |
Subject: | Re: [bash-bug] Can arithmetic evaluation trap more than just division by zero? |
Date: | Tue, 06 Apr 2010 16:09:39 +0200 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100330 Fedora/3.0.4-1.fc11 Lightning/1.0b2pre Thunderbird/3.0.4 |
On 04/06/2010 03:59 PM, Andreas Schwab wrote:
"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.
But why there is no overflow on 32bit system? RR
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