Add `stderr` output to exception.
Add `stderr` output to exception.

ilovezfs/brew,Homebrew/brew,ilovezfs/brew,JCount/brew,sjackman/homebrew,EricFromCanada/brew,Linuxbrew/brew,reitermarkus/brew,mgrimes/brew,nandub/brew,EricFromCanada/brew,reitermarkus/brew,konqui/brew,MikeMcQuaid/brew,nandub/brew,MikeMcQuaid/brew,nandub/brew,mahori/brew,Linuxbrew/brew,claui/brew,konqui/brew,MikeMcQuaid/brew,maxim-belkin/brew,vitorgalvao/brew,Homebrew/brew,ilovezfs/brew,mgrimes/brew,JCount/brew,mahori/brew,konqui/brew,claui/brew,JCount/brew,vitorgalvao/brew,EricFromCanada/brew,sjackman/homebrew,reitermarkus/brew,mahori/brew,sjackman/homebrew,mahori/brew,EricFromCanada/brew,Linuxbrew/brew,DomT4/brew,reitermarkus/brew,vitorgalvao/brew,MikeMcQuaid/brew,mgrimes/brew,Linuxbrew/brew,vitorgalvao/brew,claui/brew,DomT4/brew,maxim-belkin/brew,sjackman/homebrew,Homebrew/brew,konqui/brew,claui/brew,nandub/brew,DomT4/brew,Homebrew/brew,JCount/brew,maxim-belkin/brew,DomT4/brew