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From:	Jose Isaias Cabrera <jicman AT outlook DOT com>
To:	Agner Fog <agner AT agner DOT org>, "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	Re: Bug report. Clang sqrtl(-1) causes access violation
Date:	Sat, 11 May 2019 03:33:45 +0000
Message-ID:	<DB7PR01MB53866AAD9EEAE0AFA6689DF3DE0D0@DB7PR01MB5386.eurprd01.prod.exchangelabs.com>
References:	<c80240c2-a30e-41b5-7635-cf31f54741d1 AT agner DOT org> <DB7PR01MB53860FB36CC45154C5862E99DE0C0 AT DB7PR01MB5386 DOT eurprd01 DOT prod DOT exchangelabs DOT com> <03f2a425-2f3f-4230-c4c5-3265f511d4f5 AT agner DOT org> <DB7PR01MB538645A4A3A507A493B098D0DE0C0 AT DB7PR01MB5386 DOT eurprd01 DOT prod DOT exchangelabs DOT com>,<06482f2d-df3e-7083-15b0-707db4fce98e AT agner DOT org>
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Agner Fog, on Friday, May 10, 2019 04:55 PM, wrote...

>$ uname -a
>CYGWIN_NT-10.0 DESKTOP-08PNUTF 3.0.6(0.338/5/3) 2019-04-06 16:18 x86_64
>Cygwin
>
>
>$ clang --version
>clang version 5.0.1 (tags/RELEASE_501/final)
>Target: x86_64-unknown-windows-cygnus
>Thread model: posix
>InstalledDir: /usr/bin

You are correct.  There is a problem with the x86_64.  I was trying on a 32bit system which does not fail.  But, on my x86_64, I am witnessing the same behaviour you reported.  So, now, let's see what the developers say.  Thanks.

$ clang sqrt.cpp

jcabrera AT elimelec /cygdrive/c/source/c++/test
$ ls
a.exe  sqrt.cpp

jcabrera AT elimelec /cygdrive/c/source/c++/test
$ ./a.exe
Segmentation fault (core dumped)

jcabrera AT elimelec /cygdrive/c/source/c++/test
$ uname -a
CYGWIN_NT-10.0 elimelec 3.0.7(0.338/5/3) 2019-04-30 18:08 x86_64 Cygwin

jcabrera AT elimelec /cygdrive/c/source/c++/test
$ clang --version
clang version 5.0.1 (tags/RELEASE_501/final)
Target: x86_64-unknown-windows-cygnus
Thread model: posix
InstalledDir: /usr/bin

josé


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