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-rw-r--r--lib/rake/backtrace.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rake/backtrace.rb b/lib/rake/backtrace.rb
index 038ca57906..e67132f67a 100644
--- a/lib/rake/backtrace.rb
+++ b/lib/rake/backtrace.rb
@@ -2,7 +2,7 @@ module Rake
module Backtrace
SUPPRESSED_PATHS =
RbConfig::CONFIG.values_at(*RbConfig::CONFIG.
- keys.grep(/(prefix|libdir)/)) + [
+ keys.grep(/(prefix|libdir)/)).uniq + [
File.join(File.dirname(__FILE__), ".."),
].map { |f| Regexp.quote(File.expand_path(f)) }
SUPPRESSED_PATHS.reject! { |s| s.nil? || s =~ /^ *$/ }