From da8ea7ea207c587ac407ccd007378a674d744e90 Mon Sep 17 00:00:00 2001
From: conrad <conrad@localhost.localdomain>
Date: Tue, 5 Nov 2024 18:53:25 +1000
Subject: [PATCH] add note

---
 include/armadillo_bits/auxlib_meat.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/armadillo_bits/auxlib_meat.hpp b/include/armadillo_bits/auxlib_meat.hpp
index 8a70da4c..72bd2e75 100644
--- a/include/armadillo_bits/auxlib_meat.hpp
+++ b/include/armadillo_bits/auxlib_meat.hpp
@@ -28,6 +28,10 @@ auxlib::inv(Mat<eT>& A)
   {
   arma_debug_sigprint();
   
+  // NOTE: given a matrix with NaN values, getrf() and getri() do not necessarily fail,
+  // NOTE: and can produce matrices with NaN values.
+  // NOTE: we're not checking for non-finite values to avoid breaking existing user code.
+  
   if(A.is_empty())  { return true; }
   
   #if defined(ARMA_USE_LAPACK)