diff --git a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl.qll b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl.qll
index c66bcde0044..2da1d89e499 100644
--- a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl.qll
+++ b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl2.qll b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl2.qll
index c66bcde0044..2da1d89e499 100644
--- a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl2.qll
+++ b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl2.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl3.qll b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl3.qll
index c66bcde0044..2da1d89e499 100644
--- a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl3.qll
+++ b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl3.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl4.qll b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl4.qll
index c66bcde0044..2da1d89e499 100644
--- a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl4.qll
+++ b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImpl4.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImplLocal.qll b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImplLocal.qll
index c66bcde0044..2da1d89e499 100644
--- a/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImplLocal.qll
+++ b/cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowImplLocal.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl.qll b/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl.qll
index c66bcde0044..2da1d89e499 100644
--- a/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl.qll
+++ b/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl2.qll b/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl2.qll
index c66bcde0044..2da1d89e499 100644
--- a/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl2.qll
+++ b/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl2.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl3.qll b/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl3.qll
index c66bcde0044..2da1d89e499 100644
--- a/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl3.qll
+++ b/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl3.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl4.qll b/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl4.qll
index c66bcde0044..2da1d89e499 100644
--- a/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl4.qll
+++ b/cpp/ql/src/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl4.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl.qll b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl.qll
index c66bcde0044..2da1d89e499 100644
--- a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl.qll
+++ b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl2.qll b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl2.qll
index c66bcde0044..2da1d89e499 100644
--- a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl2.qll
+++ b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl2.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl3.qll b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl3.qll
index c66bcde0044..2da1d89e499 100644
--- a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl3.qll
+++ b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl3.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl4.qll b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl4.qll
index c66bcde0044..2da1d89e499 100644
--- a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl4.qll
+++ b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl4.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl5.qll b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl5.qll
index c66bcde0044..2da1d89e499 100644
--- a/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl5.qll
+++ b/csharp/ql/src/semmle/code/csharp/dataflow/internal/DataFlowImpl5.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl.qll b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl.qll
index c66bcde0044..2da1d89e499 100644
--- a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl.qll
+++ b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl2.qll b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl2.qll
index c66bcde0044..2da1d89e499 100644
--- a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl2.qll
+++ b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl2.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl3.qll b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl3.qll
index c66bcde0044..2da1d89e499 100644
--- a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl3.qll
+++ b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl3.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl4.qll b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl4.qll
index c66bcde0044..2da1d89e499 100644
--- a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl4.qll
+++ b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl4.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {
diff --git a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl5.qll b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl5.qll
index c66bcde0044..2da1d89e499 100644
--- a/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl5.qll
+++ b/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl5.qll
@@ -1260,7 +1260,7 @@ abstract private class AccessPath extends TAccessPath {
 
 private class AccessPathNil extends AccessPath, TNil {
   override string toString() {
-    exists(DataFlowType t | this = TNil(t) | result = concat(ppReprType(t)))
+    exists(DataFlowType t | this = TNil(t) | result = concat(" : " + ppReprType(t)))
   }
 
   override AccessPathFront getFront() {