JS: Use getUnderlyingValue() a few places in VariableCapture

Author: asgerf

javascript/ql/lib/semmle/javascript/dataflow/internal/VariableCapture.qll

@@ -8,7 +8,7 @@ module VariableCaptureConfig implements InputSig<js::DbLocation> {
   private js::Function getLambdaFromVariable(js::LocalVariable variable) {
     result.getVariable() = variable
     or
-    result = variable.getAnAssignedExpr()
+    result = variable.getAnAssignedExpr().getUnderlyingValue()
     or
     exists(js::ClassDeclStmt cls |
       result = cls.getConstructor().getBody() and
@@ -148,9 +148,11 @@ module VariableCaptureConfig implements InputSig<js::DbLocation> {
     predicate hasAliasedAccess(Expr e) {
       e = this
       or
+      e.(js::Expr).getUnderlyingValue() = this
+      or
       exists(js::LocalVariable variable |
         this = getLambdaFromVariable(variable) and
-        e = variable.getAnAccess()
+        e.(js::Expr).getUnderlyingValue() = variable.getAnAccess()
       )
     }
   }

javascript/ql/test/library-tests/TripleDot/iife.js

@@ -16,8 +16,8 @@ function f2() {
         })(x);
         return y;
     }
-    sink(inner(source("f2.1"))); // $ MISSING: hasValueFlow=f2.1
-    sink(inner(source("f2.2"))); // $ MISSING: hasValueFlow=f2.2
+    sink(inner(source("f2.1"))); // $ hasValueFlow=f2.1
+    sink(inner(source("f2.2"))); // $ hasValueFlow=f2.2
 }
 
 function f3() {
@@ -64,8 +64,8 @@ function f6() {
         (nested)(x); // same as f5, except the callee is parenthesised here
         return y;
     }
-    sink(inner(source("f6.1"))); // $ MISSING: hasValueFlow=f6.1
-    sink(inner(source("f6.2"))); // $ MISSING: hasValueFlow=f6.2
+    sink(inner(source("f6.1"))); // $ hasValueFlow=f6.1
+    sink(inner(source("f6.2"))); // $ hasValueFlow=f6.2
 }
 
 function f7() {
@@ -77,6 +77,6 @@ function f7() {
         nested(x); // same as f5, except the function definition is parenthesised
         return y;
     }
-    sink(inner(source("f7.1"))); // $ MISSING: hasValueFlow=f7.1
-    sink(inner(source("f7.2"))); // $ MISSING: hasValueFlow=f7.2
+    sink(inner(source("f7.1"))); // $ hasValueFlow=f7.1
+    sink(inner(source("f7.2"))); // $ hasValueFlow=f7.2
 }