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[Octave-bug-tracker] [bug #45507] acos returns different results on big

From: Lachlan Andrew
Subject: [Octave-bug-tracker] [bug #45507] acos returns different results on big input values on gcc 4.8
Date: Sun, 3 Jul 2016 22:35:30 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0 
Follow-up Comment #47, bug #45507 (project octave):


cc     c99-acos-test.c   -o c99-acos-test -lm
z = 1.5708 + -infi
error: fails assertion real(z) == 0



g++ -std=gnu++11    cxx11-acos-test.cc   -o cxx11-acos-test
./cxx11-acos-test 
z = 1.5708 + -infi
error: fails assertion real(z) == 0


OS: Linux Mint Debian Edition
gcc version 4.8.2 (Debian 4.8.2-1) 
GNU libc version: 2.17
x86_64

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