1 files changed, 9 insertions, 1 deletions
diff --git a/Library/Homebrew/utils/popen.rb b/Library/Homebrew/utils/popen.rb
index 2fa3ade46..21dceec06 100644
--- a/Library/Homebrew/utils/popen.rb
+++ b/Library/Homebrew/utils/popen.rb
@@ -14,7 +14,15 @@ module Utils
         yield pipe
       else
         options[:err] ||= :close unless ENV["HOMEBREW_STDERR"]
-        exec(*args, options)
+        begin
+          exec(*args, options)
+        rescue Errno::ENOENT
+          $stderr.puts "brew: command not found: #{args[0]}" unless options[:err] == :close
+          exit! 127
+        rescue SystemCallError
+          $stderr.puts "brew: exec failed: #{args[0]}" unless options[:err] == :close
+          exit! 1
+        end
       end
     end
   end