From 85c5d6447aaee7516b7972f4587420aa7198ea57 Mon Sep 17 00:00:00 2001
From: Avik Pal <avikpal@mit.edu>
Date: Wed, 1 Nov 2023 21:45:21 -0400
Subject: [PATCH] try fixing LM for banded jacobian

---
 src/levenberg.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/levenberg.jl b/src/levenberg.jl
index f181fcfcc..39cd7ca7e 100644
--- a/src/levenberg.jl
+++ b/src/levenberg.jl
@@ -356,7 +356,7 @@ function perform_step!(cache::LevenbergMarquardtCache{false, fastls}) where {fas
 
     # Usual Levenberg-Marquardt step ("velocity").
     if fastls
-        cache.mat_tmp = vcat(J, λ .* cache.DᵀD)
+        cache.mat_tmp = _vcat(J, λ .* cache.DᵀD)
         cache.rhs_tmp[1:length(fu1)] .= -_vec(fu1)
         linres = dolinsolve(alg.precs, linsolve; A = cache.mat_tmp,
             b = cache.rhs_tmp, linu = _vec(cache.v), p = p, reltol = cache.abstol)