diff --git a/lib/checkstl.cpp b/lib/checkstl.cpp
index 914753f6a..ad1539a50 100644
--- a/lib/checkstl.cpp
+++ b/lib/checkstl.cpp
@@ -796,9 +796,15 @@ void CheckStl::mismatchingContainerIterator()
                 continue;
             if (val.lifetimeKind != ValueFlow::Value::LifetimeKind::Iterator)
                 continue;
-            if (isSameExpression(true, false, tok, val.tokvalue, mSettings->library, false, false))
-                continue;
-            mismatchingContainerIteratorError(tok, iterTok);
+            for (const LifetimeToken& lt:getLifetimeTokens(tok)) {
+                if (lt.inconclusive)
+                    continue;
+                const Token* contTok = lt.token;
+                if (isSameExpression(true, false, contTok, val.tokvalue, mSettings->library, false, false))
+                    continue;
+                mismatchingContainerIteratorError(tok, iterTok);
+            }
+
         }
     }
 }
diff --git a/test/teststl.cpp b/test/teststl.cpp
index 24f59c045..439e1a413 100644
--- a/test/teststl.cpp
+++ b/test/teststl.cpp
@@ -1351,6 +1351,20 @@ private:
               "    return a;\n"
               "}\n");
         ASSERT_EQUALS("[test.cpp:2]: (error) Iterator 'b.begin()' from different container 'a' are used together.\n", errout.str());
+
+        // #9973
+        check("void f() {\n"
+              "    std::list<int> l1;\n"
+              "    std::list<int> l2;\n"
+              "    std::list<int>& l = l2;\n"
+              "    for (auto it = l.begin(); it != l.end(); ++it) {\n"
+              "        if (*it == 1) {\n"
+              "            l.erase(it);\n"
+              "            break;\n"
+              "        }\n"
+              "    }\n"
+              "}\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
     // Dereferencing invalid pointer