[Newbies] Debug within an error catching block

Bert Freudenberg bert at freudenbergs.de
Sat Dec 11 01:55:15 UTC 2010

On 10.12.2010, at 16:37, Clinton Blackmore wrote:

> Greetings.
> In one area of code, I need to set a break point and do some debugging.  This code is called deeply within a block that is wrapped up so that the end user does not see errors that occur.
> In very simplified form, it is like this:
> [ self error: 'Throwing an error' ] ifError: [:err :rcvr | Transcript show: 'Trapped error']
> When I 'do it', this example will always trap the error instead of breaking into the debugger (which, quit clearly, it is designed to do.)
> While I shudder to think of how easily it could be abused, there is no way to break into a debugger anyway, is there (without finding and disabling the outer block that is sent ifError)?  Perhaps a hypothetical self untrappableError or self bringUpTheDebuggerPlease?

To set a breakpoint do "self halt":

[ self halt. self error: 'Throwing an error' ] ifError: [:err :rcvr | Transcript show: 'Trapped error']

- Bert -

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