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-rw-r--r--miasm2/analysis/modularintervals.py6
1 files changed, 4 insertions, 2 deletions
diff --git a/miasm2/analysis/modularintervals.py b/miasm2/analysis/modularintervals.py
index 0752f57b..14092931 100644
--- a/miasm2/analysis/modularintervals.py
+++ b/miasm2/analysis/modularintervals.py
@@ -22,8 +22,10 @@ class ModularIntervals(object):
 
         # Sanity check
         start, end = intervals.hull()
-        assert end <= self.mask
-        assert start >= 0
+        if start is not None:
+            assert start >= 0
+        if end is not None:
+            assert end <= self.mask
 
     # Helpers