Provide more detailed exceptions on source map opening

[GoogleCodeExporter]

What steps will reproduce the problem?
Generate source map with either:,
1. invalid format
2. different source file

What is the expected output? What do you see instead?
Detailed exception and possible solutions/instructions/
Actual Result:
Message box: "Could not open source map"

What version of the product are you using? On what operating system?
Closure Inspector 0.9
Firebug 1.4.5
Windows Vista x64

Original issue reported on code.google.com by Sakharov on 27 Nov 2009 at 9:48

[GoogleCodeExporter]

My environment is same as Sakharov.
It seems my Closure-Inspector totaly does not work, as I never fail to get the 
error
message "Could not open source map" either by enter the script url or open 
local file.

Original comment by [email protected] on 27 Dec 2009 at 2:16

[GoogleCodeExporter]

I'm seeing the same thing in Firefox 3.5 with Firebug 1.4.5 on XP.  CI 0.9 and 
latest
closure compiler being used.

I tried using a url as well as local file.  Both produced the same error.

Original comment by raccettu on 30 Jan 2010 at 9:28

[GoogleCodeExporter]

I'm having the same issue today:
* Firefox 3.6.13
* Firebug 1.5.4
* Closure Inspector 0.9.5

I'm happy to provide the source_map file in question and/or try out other 
browser/extension combinations.

-Nick Baum (ex-Googler)

Original comment by [email protected] on 3 May 2011 at 2:03