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<pre><span lang="EN-US" style="color:black">Dear GiNaC Team,<o:p></o:p></span></pre>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">When I tried to use GiNaC to calculate cos(cos(1/2)),I got a Segmentation Fault.<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:12.0pt">My environment is as following:<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">CPU: Intel i7-10750H<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Windows10 21H2<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">gcc version 12.2.0 (MinGW-W64 x86_64-ucrt-posix-seh)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">GiNaC 1.8.5<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">CLN 1.3.6<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">GMP 6.2.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">ArchLinux(in VMwave)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Kernel: 6.1.9-arch1-1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">GiNaC 1.8.4 installed by pacman<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">CLN 1.3.6 installed by pacman<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">gcc version 12.2.1 20230111(GCC)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">Relative code file is attached<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">The program crash at line 8.I tried to compile and run the same program at ArchLinux(GCC 12.2.1
</span><span lang="EN-US" style="font-size:12.0pt">GiNaC 1.8.4 CLN 1.3.6</span><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">),and also got a
</span><span lang="EN-US" style="font-size:12.0pt">segmentation fault.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Besides , I tried to use ginsh to execute ¡°cos(cos(1/2));¡± in
</span><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">ArchLinux ,it gave a error:</span><span lang="EN-US" style="font-size:12.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">Internal error: statement in file float/misc/cl_F_extendsqrt.cc, line 30 has been reached!!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">The same error also occurred at Windows,but it just exit without the information above.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">After that, I built some lower version of GiNaC in Windows10 and re-run my code.I found the bug disappeared at
</span><span lang="EN-US" style="font-size:12.0pt">GiNaC 1.8.3 . After reading the commit history I rollback ginac\inifcns_trans.cpp to version 1.8.3 and rebuilt ,the bug disappeared.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"><o:p> </o:p></span></p>
<pre><span lang="EN-US" style="color:black">All my best,<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black">-Weng Zhanyang.<o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"><o:p> </o:p></span></p>
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