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Paul Eggert authored
Similarly for (expt 0 bignum) and (expt -1 bignum). The result is always a -1, 0 or 1, so do not signal overflow. * src/data.c (expt_integer): Do not signal an overflow if -1 <= X <= 1. Be clearer about when overflow is signaled. * test/src/floatfns-tests.el (bignum-expt): Test this.
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