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Paul Eggert authored
Problem reported by Eli Zaretskii in: https://lists.gnu.org/r/emacs-devel/2018-08/msg00380.html * src/data.c (arithcompare): Work around incompatibility between gcc -fexcess-precision=fast and the C standard on x86, by capturing the results of floating-point comparisons before the excess precision spontaneously decays. Although this fix might not work in general, it does work here and is probably good enough for the platforms we care about. (cherry picked from commit a84cef90)
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