On Nov 7, 2013, at 5:48 PM, Alex Miller wrote:

> When you say "hit an error", I'm assuming you mean "clojure throws an 
> exception" and not "hit a breakpoint in a debugger" or something else. 

Yes -- I mean "clojure throws an exception."

> 
> I don't think there is one place where we could generically attach locals 
> info to a thrown exception. The JVM debugging interface (JVMTI - 
> http://docs.oracle.com/javase/7/docs/technotes/guides/jvmti/index.html) can 
> do an awful lot of things (including arbitrary class bytecode transformation) 
> so I would guess it's possible to build a java agent that could do this (or 
> to modify the Compiler to inject the right code at compile time). Sounds like 
> a fun project, but probably non-trivial. 

Too bad... unless someone wants to have that fun and then share it with the 
rest of us :-). It still strikes me as really odd that such basic and clearly 
desirable functionality, available forever in other environments, should be so 
hard to come by.

 -Lee

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