Exception mechanism needs to be used by builtin functions

[GoogleCodeExporter]

As of v338, the exception mechanism only kicks in if a coder uses the
try/raise/retry/finally expressions. Builtin functions currently don't
raise exceptions when unhandled conditions occur. They use some
idiosyncratic way of dealing with such conditions instead. 

All builtin functions should uniformly use the exception mechanism to deal
with .. well exceptional conditions.

Original issue reported on code.google.com by srikuma...@gmail.com on 4 Nov 2007 at 2:24

[GoogleCodeExporter]

Original comment by srikuma...@gmail.com on 4 Nov 2007 at 2:25

• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

Original comment by srikuma...@gmail.com on 13 May 2009 at 1:12

• Added labels: Priority-High
• Removed labels: Priority-Medium

[GoogleCodeExporter]

There is more use of exceptions in builtin functions such as open-file in r535.

Original comment by srikuma...@gmail.com on 8 Jul 2009 at 2:39