Fix breakage in last commit.

spec/array.test.sh caught it.
oilshell · Sep 28, 2018 · f3d9c30 · f3d9c30
1 parent f1a54e5
commit f3d9c30
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/core/word_eval.py b/core/word_eval.py
@@ -521,14 +521,20 @@ def _EvalBracedVarSub(self, part, part_vals, quoted):
         elif val.tag == value_e.StrArray:
           index = self.arith_ev.Eval(anode)
           try:
-            val = runtime.Str(val.strs[index])
+            # could be None because representation is sparse
+            s = val.strs[index]
           except IndexError:
+            s = None
+
+          if s is None:
             val = runtime.Undef()
+          else:
+            val = runtime.Str(s)
 
         elif val.tag == value_e.AssocArray:
           key = self.arith_ev.Eval(anode, int_coerce=False)
           try:
-            s = runtime.Str(val.d[key])
+            val = runtime.Str(val.d[key])
           except KeyError:
             val = runtime.Undef()