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Clarify the limitation of ? in main and tests #219

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Oct 23, 2020
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Clarify the limitation of ? in main and tests #219

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Update question-mark-in-main-and-tests.md
davidOSUL Aug 29, 2020
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Update question-mark-in-main-and-tests.md
davidOSUL Aug 29, 2020
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4 changes: 3 additions & 1 deletion src/rust-2018/error-handling-and-panics/question-mark-in-main-and-tests.md
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Expand Up @@ -75,7 +75,9 @@ fn main() -> Result<(), std::io::Error> {

In this case, if say the file doesn't exist and there is an `Err(err)` somewhere,
then `main` will exit with an error code (not `0`) and print out a `Debug`
representation of `err`.
representation of `err`. Note that this will always print out the `Debug` representation.
If you would like to, for example, print out the `Display` representation of `err`,
you will still have to do what you would in Rust 2015.

## More details

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