<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-size:large">it's not me that say first ghc can have bug. There is a misunderstanding, i first thought that if there was a problem it was not the core ghc interpreter/compiler (note that i never try to compile with ghc, possible the behavior is different in interpreter than in compile mode) but i had a lot of doubt about the stability of the mysql* packages.<br><br></div><div class="gmail_default" style="font-size:large">BUT i just made more test with the same mysql* package (version is the latest,just installed with cabal) on another system this time 32bits:<br>[mattei@asteroide ~]$ uname -a<br>Linux asteroide 3.10.0-862.3.3.el7.x86_64 #1 SMP Fri Jun 15 04:15:27 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux<br>[mattei@asteroide ~]$ cat /etc/redhat-release <br>CentOS Linux release 7.5.1804 (Core) <br>[mattei@asteroide ~]$ ghci<br>GHCi, version 8.4.3: <a href="http://www.haskell.org/ghc/">http://www.haskell.org/ghc/</a> :? for help<br><br></div><div class="gmail_default" style="font-size:large">ghci version 8.4.3 <br><br></div><div class="gmail_default" style="font-size:large">and the program works fine, this does not means that the ghci v8.2 have bugs nor the mysql* packages , just means that there is some incompatibilies between ghc 8.2 and the latest versions of mysql* packages (mysql-simple-0.4.5)<br><br></div><div class="gmail_default" style="font-size:large">i think there is something that can be enhanced in the cabal or the package installion script of mysql* packages to detect those incompatibilities but i do not know how, perheaps if with cabal and ghc 8.2 i had installed an earlier verison of mysql* it could have worked without problem.<br></div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">Damien<br></div><div class="gmail_default" style="font-size:large"><br></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Feb 22, 2019 at 12:35 PM Sven Panne <<a href="mailto:svenpanne@gmail.com">svenpanne@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr">Am Fr., 22. Feb. 2019 um 11:39 Uhr schrieb Damien Mattei <<a href="mailto:damien.mattei@gmail.com" target="_blank">damien.mattei@gmail.com</a>>:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div style="font-size:large">[...] but i think it's the 8.2 compiler that cause the bug...<br></div></div></blockquote><div><br></div><div>After a quick look at your code, I very much doubt that. You use the mysql-simple package, which in turn uses the mysql package, which in turn uses the native mysqlclient library. My (and probably most people's) reaction here is: It is much, much more probable that either</div><div><br></div><div> a) you use the package/library incorrectly</div><div><br></div><div>or</div><div><br></div><div> b) the package/library has a bug</div><div><br></div><div>than that you have discovered a compiler bug for otherwise farily trivial code. Your best bet is to either rip out the mysql dependencies and still reproduce the bug or issue a bug report at e.g. <a href="https://github.com/paul-rouse/mysql-simple/issues" target="_blank">https://github.com/paul-rouse/mysql-simple/issues</a>.</div><div><br></div><div>Note that I'm not saying that GHC is bug-free, it is just a question where people will probably like to spend their time on. Given the fact that there are tons of buggy packages/libraries with questionable quality out there, it is basically *your* onus to show that your problem is GHC's fault.</div><div><br></div><div>Just my 2c...</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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