diff --git a/scripts/nightly.yaml b/scripts/nightly.yaml
index 2cf35b9ec..5ea90e0ef 100644
--- a/scripts/nightly.yaml
+++ b/scripts/nightly.yaml
@@ -264,7 +264,7 @@ stages:
         artifactName: 'Mac'
         targetPath: $(Agent.TempDirectory)
     - script: cd $(Agent.TempDirectory); mkdir osx-bin; cd osx-bin; unzip ../*osx*.zip
-    - script: cd $(Agent.TempDirectory); mkdir linux-bin; cd linux-bin; unzip ../*centos*.zip
+    - script: cd $(Agent.TempDirectory); mkdir linux-bin; cd linux-bin; unzip ../*glibc*.zip
     - script: cd $(Agent.TempDirectory); mkdir win32-bin; cd win32-bin; unzip ../*x86-win*.zip
     - script: cd $(Agent.TempDirectory); mkdir win64-bin; cd win64-bin; unzip ../*x64-win*.zip
     - script: python3 -m pip install --user -U setuptools wheel
diff --git a/src/sat/sat_ddfw.cpp b/src/sat/sat_ddfw.cpp
index f21e54fb7..d69c4516c 100644
--- a/src/sat/sat_ddfw.cpp
+++ b/src/sat/sat_ddfw.cpp
@@ -131,7 +131,7 @@ namespace sat {
         unsigned idx = m_clauses.size();
         m_clauses.push_back(clause_info(cls, m_config.m_init_clause_weight));
         for (literal lit : *cls) {
-            m_use_list.reserve(lit.index()+1);
+            m_use_list.reserve(2*(lit.var()+1));
             m_vars.reserve(lit.var()+1);
             m_use_list[lit.index()].push_back(idx);
         }
@@ -224,6 +224,7 @@ namespace sat {
             m_flat_use_list.append(ul);
         }
         m_use_list_index.push_back(m_flat_use_list.size());
+//        m_use_list_index.push_back(m_flat_use_list.size());
     }
 
 
diff --git a/src/sat/sat_ddfw.h b/src/sat/sat_ddfw.h
index 411c7010c..89d74f8f4 100644
--- a/src/sat/sat_ddfw.h
+++ b/src/sat/sat_ddfw.h
@@ -107,7 +107,12 @@ namespace sat {
             use_list(ddfw& p, literal lit):
                 p(p), i(lit.index()) {}
             unsigned const* begin() { return p.m_flat_use_list.c_ptr() + p.m_use_list_index[i]; }
-            unsigned const* end() { return p.m_flat_use_list.c_ptr() + p.m_use_list_index[i+1]; }
+            unsigned const* end() {
+                if (p.m_use_list_index.size() <= i + 1) { 
+                    std::cout << "out of bounds\n"; 
+                } 
+                VERIFY(p.m_use_list_index.size() > i + 1);  return p.m_flat_use_list.c_ptr() + p.m_use_list_index[i + 1];
+            }
         };
 
         void flatten_use_list();