parse.y: Ripper.sexp returns error

* ext/ripper/lib/ripper/sexp.rb (Ripper.sexp, Ripper.sexp_raw):
  return nil on error.  [ruby-dev:48678] [Bug #10405]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48144 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 2 deletions

diff --git a/ext/ripper/lib/ripper/sexp.rb b/ext/ripper/lib/ripper/sexp.rb
index 66bd69134d..150c6f0cf8 100644
--- a/ext/ripper/lib/ripper/sexp.rb
+++ b/ext/ripper/lib/ripper/sexp.rb
@@ -28,7 +28,9 @@ class Ripper
   #           [:bodystmt, [[:var_ref, [:@kw, "nil", [1, 9]]]], nil, nil, nil]]]]
   #
   def Ripper.sexp(src, filename = '-', lineno = 1)
-    SexpBuilderPP.new(src, filename, lineno).parse
+    builder = SexpBuilderPP.new(src, filename, lineno)
+    sexp = builder.parse
+    sexp unless builder.error?
   end
 
   # [EXPERIMENTAL]
@@ -52,7 +54,9 @@ class Ripper
   #             nil]]]]
   #
   def Ripper.sexp_raw(src, filename = '-', lineno = 1)
-    SexpBuilder.new(src, filename, lineno).parse
+    builder = SexpBuilder.new(src, filename, lineno)
+    sexp = builder.parse
+    sexp unless builder.error?
   end
 
   class SexpBuilderPP < ::Ripper   #:nodoc: