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-rw-r--r--Util/VS2010/DafnyExtension/DafnyExtension/IdentifierTagger.cs4
1 files changed, 3 insertions, 1 deletions
diff --git a/Util/VS2010/DafnyExtension/DafnyExtension/IdentifierTagger.cs b/Util/VS2010/DafnyExtension/DafnyExtension/IdentifierTagger.cs
index 4f414b91..7aaf8944 100644
--- a/Util/VS2010/DafnyExtension/DafnyExtension/IdentifierTagger.cs
+++ b/Util/VS2010/DafnyExtension/DafnyExtension/IdentifierTagger.cs
@@ -225,7 +225,9 @@ namespace DafnyLanguage
foreach (var lhs in s.Lhss) {
IdRegion.Add(regions, lhs.Tok, lhs, true, module);
}
- if (s.Update is UpdateStmt) {
+ if (s.Update == null) {
+ // the VarDeclStmt has no associated assignment
+ } else if (s.Update is UpdateStmt) {
var upd = (UpdateStmt)s.Update;
foreach (var rhs in upd.Rhss) {
foreach (var ee in rhs.SubExpressions) {