Handle parsing failure in _ReadVarOpArg (#100) (#101)

oilshell · May 5, 2018 · 2ec7302e001263412e355be968d0acf18ac70872 · 2ec7302
1 parent d9bebcd
commit 2ec7302e001263412e355be968d0acf18ac70872
Unified Split

Showing with 3 additions and 0 deletions.

+3 −0 osh/word_parse.py
diff --git a/osh/word_parse.py b/osh/word_parse.py
@@ -145,6 +145,9 @@ def _ReadVarOpArg(self, arg_lex_mode, eof_type=Id.Undefined_Tok,

    w = self._ReadCompoundWord(
        lex_mode=arg_lex_mode, eof_type=eof_type, empty_ok=empty_ok)
+    if not w:
+      return None
+
    # This is for "${s:-}", ${s/a//}, etc.  It is analogous to
    # LooksLikeAssignment where we turn x= into x=''.  It has the same
    # potential problem of not having spids.