segfault on reading vector

[Charles Greathouse <charles.greathouse@case.edu>]

I wrote a quick script to help someone with an "insert operators into
123456789 to make 100" problem.  In essence, it was 9 nested loops
building a string with
if(trap(,0,eval(s9)==100),
	listput(v,s9)
)
inside, where v is a List.  At the end it returns Vec(v). The program
runs without problems, but when I try to access the return value I get
*** type: bug in PARI/GP (Segmentation Fault), please report
on both
          GP/PARI CALCULATOR Version 2.6.0 (development git-d1d257d)
           i686 running mingw (ix86/GMP-5.0.1 kernel) 32-bit version
                compiled: May  9 2012, gcc version 4.6.3 (GCC)
                (readline v6.2 enabled, extended help enabled)
and even on the old
         GP/PARI CALCULATOR Version 2.4.2 (development CHANGES-1.1971)
           i686 running cygwin (ix86/GMP-4.2.1 kernel) 32-bit version
 compiled: Dec 23 2007, gcc-3.4.4 (cygming special, gdc 0.12, using dmd 0.125)
                 (readline v5.2 enabled, extended help enabled)

I don't know why this is -- a general bug, a Windows-specific bug, or
a problem with my code. I tried it with iferr as well (only on 2.6.0)
with the same result.

If I change the program to print the results and return a tally, it
works without difficulty.  The full code is

test()={
	my(s1,s2,s3,s4,s5,s6,s7,s8,s9,op=["","+","-","*","/"],v=List());
	for(n1=1,5,
		s1=Str(1, op[n1]);
		for(n2=1,5,
			s2=Str(s1, 2, op[n2]);
			for(n3=1,5,
				s3=Str(s2, 3, op[n3]);
				for(n4=1,5,
					s4=Str(s3, 4, op[n4]);
					for(n5=1,5,
						s5=Str(s4, 5, op[n5]);
						for(n6=1,5,
							s6=Str(s5, 6, op[n6]);
							for(n7=1,5,
								s7=Str(s6, 7, op[n7]);
								for(n8=1,5,
									s8=Str(s7, 8, op[n8]);
									for(n9=1,5,
										s9=Str(s8, 9, op[n9]);
										if(trap(,0,eval(s9)==100),
											listput(v,s9)
										)
									)
								)
							)
						)
					)
				)
			)
		)
	);
	Vec(v)
};

(inelegant, but runs fast enough)

Charles Greathouse
Analyst/Programmer
Case Western Reserve University