1 files changed, 2 insertions, 0 deletions

diff --git a/bitbake/lib/ply/yacc.py b/bitbake/lib/ply/yacc.py
index 6168fd9a03..d50886ed2f 100644
--- a/bitbake/lib/ply/yacc.py
+++ b/bitbake/lib/ply/yacc.py
@@ -195,6 +195,8 @@ class YaccProduction:
         self.lexer = None
         self.parser= None
     def __getitem__(self,n):
+        if isinstance(n,slice):
+            return [self[i] for i in range(*(n.indices(len(self.slice))))]
         if n >= 0: return self.slice[n].value
         else: return self.stack[n].value