Error handling is about error in the inputs, not bug. - C++ and Beyond 2012

• hardware work
• program is correct
• opposed to general reliability, but consider
  • network error
  • device error
  • data error

Hypothesis

• bad error handling engenders errors
• insufficient testing make improbable error scenario
• legit error lead to corrupt programs

Expected

• either T
• or the reason T was not created

Dislocation + Nestng = Fail

• scope_guard
  • encapsulate control flow
  • scope_guard composition
  • put action at top level