chainerror/booksrc/tutorial5.md

The source() of Errors

Sometimes you want to inspect the source() of an Error. chainerror implements std::error::Error::source(), so you can get the cause of an error.

{{#include ../examples/tutorial5.rs}}
# #[allow(dead_code)]
# mod chainerror {
{{#rustdoc_include ../src/lib.rs:-1}}
# }

Note, that because we changed the output of the error in main() from Debug to Display, we don't see the error backtrace with filename and line number.

To use the Display backtrace, you have to use the alternative display format output {:#}.