diff --git a/lib/checkmemoryleak.cpp b/lib/checkmemoryleak.cpp
index 158bcac04..2cf931103 100644
--- a/lib/checkmemoryleak.cpp
+++ b/lib/checkmemoryleak.cpp
@@ -181,7 +181,10 @@ CheckMemoryLeak::AllocType CheckMemoryLeak::getReallocationType(const Token *tok
     const Library::AllocFunc *f = mSettings_->library.getReallocFuncInfo(tok2);
     if (!(f && f->reallocArg > 0 && f->reallocArg <= numberOfArguments(tok2)))
         return No;
-    const Token* arg = getArguments(tok2).at(f->reallocArg - 1);
+    const auto args = getArguments(tok2);
+    if (args.size() < (f->reallocArg))
+        return No;
+    const Token* arg = args.at(f->reallocArg - 1);
     while (arg && arg->isCast())
         arg = arg->astOperand1();
     while (arg && arg->isUnaryOp("*"))
diff --git a/test/testmemleak.cpp b/test/testmemleak.cpp
index 4d0463979..e4ea82944 100644
--- a/test/testmemleak.cpp
+++ b/test/testmemleak.cpp
@@ -2177,6 +2177,8 @@ private:
 
         // Test getAllocationType for subfunction
         TEST_CASE(getAllocationType);
+
+        TEST_CASE(crash1); // #10729
     }
 
     void functionParameter() {
@@ -2565,6 +2567,18 @@ private:
               "}\n");
         ASSERT_EQUALS("", errout.str());
     }
+
+    void crash1() { // #10729
+        check("void foo() {\n"
+              "    extern void *realloc (void *ptr, size_t size);\n"
+              "}");
+        ASSERT_EQUALS("", errout.str());
+
+        check("void foo() {\n"
+              "    extern void *malloc (size_t size);\n"
+              "}");
+        ASSERT_EQUALS("", errout.str());
+    }
 };
 REGISTER_TEST(TestMemleakNoVar)