Clear list of last possibilities when current expression has no possibilities.

16a11f0f · Sander Mathijs van Veen · effcdda4 · 16a11f0f
Commit 16a11f0f authored Feb 27, 2012 by Sander Mathijs van Veen
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src/parser.py src/parser.py +7 -0

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--- a/src/parser.py
+++ b/src/parser.py
@@ -285,6 +285,13 @@ class Parser(BisonParser):
        """
        if option == 1:  # rule: EXP NEWLINE
            self.root_node = values[0]
+
+            # Clear list of last possibilities when current expression has no
+            # possibilities. Otherwise, an invalid expression gets the last
+            # possibilities of a valid expression.
+            if not self.possibilities:
+                self.last_possibilities = []
+
            return values[0]

        if option == 2:  # rule: DEBUG NEWLINE