Don't derive name on singleton creation
Don't derive name on singleton creation

Summary: instead fetch it only on exception

Reviewed By: andriigrynenko

Differential Revision: D3718303

fbshipit-source-id: a021d150f20ab00fe8146f17b19a69fa0da2b0da

facebook/folly,charsyam/folly,charsyam/folly,floxard/folly,rklabs/folly,floxard/folly,rklabs/folly,Orvid/folly,floxard/folly,Orvid/folly,Orvid/folly,floxard/folly,rklabs/folly,charsyam/folly,floxard/folly,facebook/folly,rklabs/folly,charsyam/folly,Orvid/folly,facebook/folly,facebook/folly,Orvid/folly,facebook/folly,rklabs/folly