Convert incompatible encoding symbol names

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/irb/completion.rb b/lib/irb/completion.rb
index 723674738d..10533c5433 100644
--- a/lib/irb/completion.rb
+++ b/lib/irb/completion.rb
@@ -99,7 +99,9 @@ module IRB
         return nil if doc_namespace
         if Symbol.respond_to?(:all_symbols)
           sym = $1
-          candidates = Symbol.all_symbols.collect{|s| ":" + s.id2name}
+          candidates = Symbol.all_symbols.collect do |s|
+            ":" + s.id2name.encode(Encoding.default_external)
+          end
           candidates.grep(/^#{Regexp.quote(sym)}/)
         else
           []