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-rw-r--r--lib/irb/workspace.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/irb/workspace.rb b/lib/irb/workspace.rb
index 991df2e652..edc0d3b147 100644
--- a/lib/irb/workspace.rb
+++ b/lib/irb/workspace.rb
@@ -97,7 +97,7 @@ EOF
when 3
return nil if bt =~ /irb\/.*\.rb/
return nil if bt =~ /irb\.rb/
- bt.sub!(/:\s*in `irb_binding'/, '')
+ bt = bt.sub(/:\s*in `irb_binding'/, '')
end
bt
end