Add Exception.stack to allow logging the stack of a caught exception

[DartBot]

This issue was originally filed by jack.palevich@gmail.com

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I'm writing a program that tries to recover from unexpected exceptions by catching them and continuing.

However, I would still like to log the caught exception, so that I can analyze it later.

I can't do that currently because there is no way of getting the stack trace of the "throw" site out of an exception object.

An example of what I want is:

try {
 ...
} catch (Exception e) {
  log("Caught exception $e: Stack trace: ${e.stack}");
}

For what it is worth, this is for a program that is playing a game in a competition. For this kind of program it is better to keep playing, even with possibly buggy behavior, than to crash.

[DartBot]

This comment was originally written by drfibonacci@google.com

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Removed Type-Defect label.
Added Type-Enhancement, Area-Language, Triaged labels.

[gbracha]

I'm not sure what you're asking for. If you want resumable exceptions, we're sorry, we can't implement that on top of Javascript. If all you want is a stack trace, that is already possible:

try {
 ...
} catch (Exception e, t) {
  log("Caught exception $e: Stack trace: $t");
}

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Set owner to @gbracha.
Added WontFix label.

[DartBot]

This comment was originally written by jackpa...@google.com

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I didn't know about the optional second argument to the catch clause.

That second argument, that provides the stack trace, is sufficient for what I want to do.

Thanks!