[DO NOT MERGE - Debug] Windows segfault debug

[rok-cesnovar]

PR to debug #1615 using the #1558 branch

[stan-buildbot]

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Name	Old Result	New Result	Ratio	Performance change( 1 - new / old )
gp_pois_regr/gp_pois_regr.stan	4.93	5.07	0.97	-2.74% slower
low_dim_corr_gauss/low_dim_corr_gauss.stan	0.02	0.02	1.01	1.0% faster
eight_schools/eight_schools.stan	0.09	0.09	0.97	-3.53% slower
gp_regr/gp_regr.stan	0.23	0.23	1.0	-0.03% slower
irt_2pl/irt_2pl.stan	6.08	6.11	1.0	-0.46% slower
performance.compilation	87.57	86.72	1.01	0.97% faster
low_dim_gauss_mix_collapse/low_dim_gauss_mix_collapse.stan	7.4	7.36	1.01	0.52% faster
pkpd/one_comp_mm_elim_abs.stan	20.61	20.87	0.99	-1.28% slower
sir/sir.stan	106.43	107.32	0.99	-0.84% slower
gp_regr/gen_gp_data.stan	0.05	0.04	1.02	1.68% faster
low_dim_gauss_mix/low_dim_gauss_mix.stan	2.98	2.98	1.0	-0.16% slower
pkpd/sim_one_comp_mm_elim_abs.stan	0.33	0.31	1.05	4.58% faster
arK/arK.stan	1.73	1.75	0.99	-0.79% slower
arma/arma.stan	0.81	0.81	1.0	0.06% faster
garch/garch.stan	0.59	0.59	1.0	-0.38% slower
Mean result: 0.999407053601

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Jenkins Console Log
Blue Ocean
Commit hash: 95a9372

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Machine information

ProductName: Mac OS X ProductVersion: 10.11.6 BuildVersion: 15G22010

CPU:
Intel(R) Xeon(R) CPU E5-1680 v2 @ 3.00GHz

G++:
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.6.0
Thread model: posix

Clang:
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.6.0
Thread model: posix