Fix numeric_power() when the exponent is INT_MIN. In power_var_int(), the computation of the number of significant digits to use in the computation used log(Abs(exp)), which isn't safe because Abs(exp) returns INT_MIN when exp is INT_MIN. Use fabs() instead of Abs(), so that the exponent is cast to a double before the absolute value is taken.
Back-patch to 9.6, where this was introduced (by 7d9a4737c2). Discussion: https://postgr.es/m/CAEZATCVd6pMkz=BrZEgBKyqqJrt2xghr=fNc8+Z=5xc6cgw...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/bc43b7c2c06c32264efe79d0b86abd41236f1d5b Modified Files -------------- src/backend/utils/adt/numeric.c | 2 +- src/test/regress/expected/numeric.out | 6 ++++++ src/test/regress/sql/numeric.sql | 1 + 3 files changed, 8 insertions(+), 1 deletion(-)
