Bug fixes to avoid NULL pointer derefs with malformed programs.

2012-02-06 12:41:55 -08:00
parent 96a429694f
commit a9ed71f553
3 changed files with 63 additions and 14 deletions
--- a/expr.cpp
+++ b/expr.cpp
@@ -2584,6 +2584,11 @@ AssignExpr::TypeCheck() {
    }

    const Type *lhsType = lvalue->GetType();
+    if (lhsType == NULL) {
+        Assert(m->errorCount > 0);
+        return NULL;
+    }
+
    if (lhsType->IsConstType()) {
        Error(lvalue->pos, "Can't assign to type \"%s\" on left-hand side of "
              "expression.", lhsType->GetString().c_str());