diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 61b18c4b..acb92a28 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -6,8 +6,10 @@
 trigger:
   branches:
     include:
-    - main
-    - dev*
+    - master
+    - dev
+    - dev2
+    - dev3
   tags:
     include:
     - v*
diff --git a/src/arena.c b/src/arena.c
index d0e60db7..0d86669b 100644
--- a/src/arena.c
+++ b/src/arena.c
@@ -216,21 +216,20 @@ static mi_decl_noinline void* mi_arena_try_alloc_at(
       // now actually commit
       bool commit_zero = false;
       if (!_mi_os_commit_ex(p, mi_size_of_slices(slice_count), &commit_zero, mi_size_of_slices(slice_count - already_committed_count))) {
-        // if the commit fails, roll back and return NULL
-        _mi_arenas_free(p, mi_size_of_slices(slice_count), *memid); // this will decommit as well (if partially committed)
-        return NULL;
+        memid->initially_committed = false;
       }
-      
-      // committed
-      if (commit_zero) { memid->initially_zero = true; }
-      #if MI_DEBUG > 1
-      if (memid->initially_zero) {
-        if (!mi_mem_is_zero(p, mi_size_of_slices(slice_count))) {
-          _mi_error_message(EFAULT, "interal error: arena allocation was not zero-initialized!\n");
-          memid->initially_zero = false;
+      else {
+        // committed
+        if (commit_zero) { memid->initially_zero = true; }
+        #if MI_DEBUG > 1
+        if (memid->initially_zero) {
+          if (!mi_mem_is_zero(p, mi_size_of_slices(slice_count))) {
+            _mi_error_message(EFAULT, "interal error: arena allocation was not zero-initialized!\n");
+            memid->initially_zero = false;
+          }
         }
+        #endif
       }
-      #endif    
     }
     else {
       // already fully commited.