Use a much smaller PARI stack size for starting up
Actually 1MB is sufficient, so there is plenty of margin
with the 16MB in this patch
See https://trac.sagemath.org/ticket/24516
diff -ru lcalc-1.23/src/Lcommandline.cc lcalc-1.23-patched//src/Lcommandline.cc
--- lcalc-1.23/src/Lcommandline.cc 2012-08-08 23:21:56.000000000 +0200
+++ lcalc-1.23-patched//src/Lcommandline.cc 2018-01-30 11:23:06.975418539 +0100
@@ -412,12 +412,7 @@
t2=.5; //t2=.5 because of the GAMMA(s+1/2)
- pari_init(1000000000,2);
- //pari_init_opts(400000000,2,INIT_DFTm); // the last option is to prevent
- //pari from giving its interrupt signal when its elliptic curve a_p
- //algorithm is called and interrupted with ctrl-c. Requires a more current
- //version of pari, so use pari_init above until I have a configure set up
- //that detects which pari, if any, is installed.
+ pari_init_opts(16000000, 2, INIT_DFTm);
coeff = new Double[3];
//compute the conductor which is copied to coeff[1]