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-rw-r--r--lib/webrick/httpservlet/cgi_runner.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/webrick/httpservlet/cgi_runner.rb b/lib/webrick/httpservlet/cgi_runner.rb
index 006abd458e..dd7325d25c 100644
--- a/lib/webrick/httpservlet/cgi_runner.rb
+++ b/lib/webrick/httpservlet/cgi_runner.rb
@@ -13,7 +13,7 @@ def sysread(io, size)
while size > 0
tmp = io.sysread(size)
buf << tmp
- size -= tmp.size
+ size -= tmp.bytesize
end
return buf
end