diff --git a/lib/valueflow.cpp b/lib/valueflow.cpp
index a1cd35a92..5684aac03 100644
--- a/lib/valueflow.cpp
+++ b/lib/valueflow.cpp
@@ -1413,6 +1413,8 @@ static void valueFlowForLoop(TokenList *tokenlist, ErrorLogger *errorLogger, con
             continue;
 
         Token * const bodyStart = tok->linkAt(1)->next();
+        if (!bodyStart->link() || bodyStart->str() != "{")
+            continue;
 
         unsigned int varid(0);
         MathLib::bigint num1(0), num2(0), numAfter(0);
diff --git a/test/testvalueflow.cpp b/test/testvalueflow.cpp
index 664d7dac4..5dfa71c2c 100644
--- a/test/testvalueflow.cpp
+++ b/test/testvalueflow.cpp
@@ -1263,6 +1263,10 @@ private:
                            "    (foo(s, , 2, , , 5, , 7)) abort()\n"
                            "}\n";
         ASSERT_THROW(valueOfTok(code, "*"), InternalError);
+
+        // #6106
+        code = " f { int i ; b2 , [ ] ( for ( i = 0 ; ; ) ) }";
+        valueOfTok(code, "*");
     }
 };