exceptions: fix ErrorDuringExecution status.
exceptions: fix ErrorDuringExecution status.

This can sometimes be nil so handle that.

Fixes #10158

vitorgalvao/brew,EricFromCanada/brew,vitorgalvao/brew,MikeMcQuaid/brew,vitorgalvao/brew,JCount/brew,nandub/brew,nandub/brew,nandub/brew,vitorgalvao/brew,Homebrew/brew,MikeMcQuaid/brew,claui/brew,EricFromCanada/brew,sjackman/homebrew,claui/brew,EricFromCanada/brew,sjackman/homebrew,MikeMcQuaid/brew,Homebrew/brew,sjackman/homebrew,JCount/brew,EricFromCanada/brew,nandub/brew,JCount/brew,claui/brew,claui/brew,Homebrew/brew,MikeMcQuaid/brew,Homebrew/brew,JCount/brew,sjackman/homebrew