fix(util/stackinfo): make sure check_stack can be invoked before 'main' (i.e., during initialization)
fix(util/stackinfo): make sure check_stack can be invoked before 'main' (i.e., during initialization)

Signed-off-by: Leonardo de Moura <7610bae85f2b530654cc716772f1fe653373e892@microsoft.com>

dselsam/lean,leanprover/lean,leanprover-community/lean,soonhokong/lean,c-cube/lean,sp3ctum/lean,leanprover/lean,soonhokong/lean,sp3ctum/lean,soonhokong/travis_test,eigengrau/lean,johoelzl/lean,sp3ctum/lean,fpvandoorn/lean,avigad/lean,javra/lean,leodemoura/lean,digama0/lean,htzh/lean,soonhokong/lean-windows,rlewis1988/lean,leanprover-community/lean,dselsam/lean,eigengrau/lean,leanprover/lean,leodemoura/lean,digama0/lean,fgdorais/lean,digama0/lean,rlewis1988/lean,javra/lean,leanprover-community/lean,javra/lean,avigad/lean,avigad/lean,htzh/lean,fgdorais/lean,leodemoura/lean,soonhokong/lean-osx,eigengrau/lean,Kha/lean,fpvandoorn/lean,leanprover-community/lean,johoelzl/lean,c-cube/lean,fpvandoorn/lean,levnach/lean,soonhokong/lean-windows,eigengrau/lean,UlrikBuchholtz/lean,Kha/lean,avigad/lean,htzh/lean,fpvandoorn/lean,soonhokong/travis_test,leodemoura/lean,levnach/lean,levnach/lean,fpvandoorn/lean,soonhokong/lean,leanprover/lean,htzh/lean,soonhokong/lean-osx,leanprover-community/lean,soonhokong/lean-osx,soonhokong/travis_test,digama0/lean,johoelzl/lean,dselsam/lean,UlrikBuchholtz/lean,htzh/lean,leanprover/lean,johoelzl/lean,Kha/lean,fgdorais/lean,c-cube/lean,soonhokong/travis_test,soonhokong/lean-windows,dselsam/lean,c-cube/lean,sp3ctum/lean,soonhokong/lean-osx,UlrikBuchholtz/lean,avigad/lean,fpvandoorn/lean,fgdorais/lean,Kha/lean,soonhokong/lean-windows,digama0/lean,c-cube/lean,digama0/lean,leodemoura/lean,fgdorais/lean,javra/lean,avigad/lean,johoelzl/lean,leanprover-community/lean,Kha/lean,fpvandoorn/lean2,rlewis1988/lean,UlrikBuchholtz/lean,fpvandoorn/lean2,fpvandoorn/lean2,fpvandoorn/lean2,soonhokong/lean-osx,dselsam/lean,soonhokong/lean,leodemoura/lean,dselsam/lean,soonhokong/lean-windows,javra/lean,sp3ctum/lean,leanprover/lean,fgdorais/lean,levnach/lean,rlewis1988/lean,Kha/lean,johoelzl/lean,soonhokong/lean,eigengrau/lean,fpvandoorn/lean2,rlewis1988/lean,rlewis1988/lean,levnach/lean,UlrikBuchholtz/lean