From 056f37f352a354f66734facbb97797c01c4694e6 Mon Sep 17 00:00:00 2001
From: Gudmundur Adalsteinsson <ofpgummi@yahoo.com>
Date: Tue, 31 Aug 2021 18:20:02 +0000
Subject: [PATCH] Problem: fast vector resize bug

Solution: init correct vector size and copy previous data into it
---
 src/polling_util.hpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/polling_util.hpp b/src/polling_util.hpp
index f0ec420d..3adcdee6 100644
--- a/src/polling_util.hpp
+++ b/src/polling_util.hpp
@@ -76,12 +76,13 @@ template <typename T, size_t S> class resizable_fast_vector_t
 
     void resize (const size_t nitems_)
     {
-        if (_dynamic_buf)
+        if (_dynamic_buf) {
             _dynamic_buf->resize (nitems_);
-        if (nitems_ > S) {
-            _dynamic_buf = new (std::nothrow) std::vector<T>;
+        } else if (nitems_ > S) {
+            _dynamic_buf = new (std::nothrow) std::vector<T> (nitems_);
             //  TODO since this function is called by a client, we could return errno == ENOMEM here
             alloc_assert (_dynamic_buf);
+            memcpy(&(*_dynamic_buf)[0], _static_buf, sizeof _static_buf);
         }
     }