logger middleware throws "TypeError: Cannot read property 'content-length' of undefined"

[eden]

The logger middleware in 1.5.2 throws the above error if it's included before middleware that writes a response.

Example:

$ cat bug.js 
var connect = require('connect');
connect(
  connect.logger(),
  connect.favicon()
).listen(1111)

$ node bug &
[1] 6251

$ curl -s :1111/favicon.ico >/dev/null

/usr/local/lib/node_modules/connect/lib/middleware/logger.js:281
return res._headers[field.toLowerCase()];
                     ^
TypeError: Cannot read property 'content-length' of undefined
    at Function.res (/usr/local/lib/node_modules/connect/lib/middleware/logger.js:281:22)
    at anonymous (eval at compile (/usr/local/lib/node_modules/connect/lib/middleware/logger.js:158:10))
    at ServerResponse.<anonymous> (/usr/local/lib/node_modules/connect/lib/middleware/logger.js:138:20)
    at /usr/local/lib/node_modules/connect/lib/middleware/favicon.js:69:15
    at [object Object].<anonymous> (fs.js:107:5)
    at [object Object].emit (events.js:61:17)
    at afterRead (fs.js:878:12)
    at wrapper (fs.js:245:17)

Swapping the order of logger() and favicon() "fixes" it except nothing is logged for non-404 responses. Downgrading to 1.5.1 fixes everything.

[tj]

probably due to the writeHead() in favicon, node doesnt really normalize any of this stuff internally so its a bit of a mess trying to provide this. and res.getHeader() throws in node after you write the header