Improve error handling for user sprintf errors
Improve error handling for user sprintf errors

blue42u/swift-t,blue42u/swift-t,blue42u/swift-t,swift-lang/swift-t,swift-lang/swift-t,blue42u/swift-t,swift-lang/swift-t,blue42u/swift-t,swift-lang/swift-t,swift-lang/swift-t,blue42u/swift-t,blue42u/swift-t,swift-lang/swift-t,swift-lang/swift-t