Handle parse failure on left-hand side of logical or (#124)

oilshell · May 28, 2018 · 451ca9e2b437e0326fc8155783d970a6f32729d8 · 451ca9e
1 parent 3315b78
commit 451ca9e2b437e0326fc8155783d970a6f32729d8
Unified Split

Showing with 2 additions and 0 deletions.

+2 −0 osh/bool_parse.py
diff --git a/osh/bool_parse.py b/osh/bool_parse.py
@@ -156,6 +156,8 @@ def ParseExpr(self):
    Expr    : Term (OR Expr)?
    """
    left = self.ParseTerm()
+    if not left:
+      return None  # TODO: An exception should handle this case.
    # [[ uses || while [ uses -o
    if self.op_id in (Id.Op_DPipe, Id.BoolUnary_o):
      if not self._Next(): return None