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-rw-r--r--src/rt/memory_region.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/rt/memory_region.cpp b/src/rt/memory_region.cpp
index 48220290270..6c50bf42d8c 100644
--- a/src/rt/memory_region.cpp
+++ b/src/rt/memory_region.cpp
@@ -21,6 +21,7 @@ memory_region::memory_region(memory_region *parent) :
 
 void memory_region::free(void *mem) {
     // printf("free: ptr 0x%" PRIxPTR"\n", (uintptr_t) mem);
+    if (!mem) { return; }
     if (_synchronized) { _lock.lock(); }
 #ifdef TRACK_ALLOCATIONS
     if (_allocation_list.replace(mem, NULL) == false) {