This is the correct result. The traceback only includes lines back to
the point where the condition was trapped. Since your internal
routine call inherits the signal on settings from the call, the error
trap is triggered while still in the internal routine, so line 2 does
not get added to the traceback.
Rick
On Mon, May 11, 2009 at 2:37 PM, Rony G. Flatscher
<rony.flatsc...@wu-wien.ac.at> wrote:
> Analyzing the contents of the condition object in order to create the lines
> ooRexx creates, if run on the command line and hitting an error.
> (This is intended to be returned in form of a message string to Java, in
> case a syntax error occurs on the Rexx side.)
>
> It seems that the traceback list does not contain the starting line, and
> that line cannot be retrieved from the information in the condition object.
>
> Maybe an example illustrates what should be achieved:
>
> -- signal on any -- line # 1
> call nested_level -- line # 2
> exit -- line # 3
>
> any: -- line # 5
> o=condition("O")
> call dump2 o, "condition object"
> call dump2 o~traceback, "traceback"
>
> -- contains a routine dump2() for dumping collections
> ::requires rgf_util2 -- line # 11
>
> ::routine nested_level -- line # 13
> say 1/0 -- line # 14
>
>
> Running the above program on the command line yields the following output:
>
> 14 *-* say 1/0 -- line # 14
> 2 *-* call nested_level -- line # 2
> Error 42 running
> E:\rony\dev\bsf\src\source_cc_40\tests\misc\testException.rex line 14:
> Arithmetic overflow/underflow
> Error 42.3: Arithmetic overflow; divisor must not be zero
>
>
> [Minor observation: it seems that the lines in the traceback do not contain
> leading whitespace. Is that intentional?]
>
>
> Running the same program, removing the line comment from the very beginning
> of the first line will cause the code at the "any" label to be executed.
> There the content of the condition object is dumped (public routine
> "dump2()" from rgf_util2, which I will be presenting at this year's Rexx
> symposium) and the traceback list, which is part of the condition object.
> This is the output:
>
> E:\rony\dev\bsf\src\source_cc_40\tests\misc>testException.rex
> condition object: (13 items)
>
> # 1: index=[ADDITIONAL] -> item=[an Array (0 items) id#_266380628]
> # 2: index=[CODE] -> item=[42.3]
> # 3: index=[CONDITION] -> item=[SYNTAX]
> # 4: index=[DESCRIPTION] -> item=[]
> # 5: index=[ERRORTEXT] -> item=[Arithmetic overflow/underflow]
> # 6: index=[INSTRUCTION] -> item=[SIGNAL]
> # 7: index=[MESSAGE] -> item=[Arithmetic overflow; divisor must not
> be zero]
> # 8: index=[PACKAGE] -> item=[a Package id#_266380692]
> # 9: index=[POSITION] -> item=[14]
> # 10: index=[PROGRAM] ->
> item=[E:\rony\dev\bsf\src\source_cc_40\tests\misc\testException.rex]
> # 11: index=[PROPAGATED] -> item=[1]
> # 12: index=[RC] -> item=[42]
> # 13: index=[TRACEBACK] -> item=[a List (1 items) id#_266380646]
> --------------------------------------------------
> traceback: (1 items)
>
> # 1: index=[0] -> item=[ 14 *-* say 1/0 -- line # 14]
> --------------------------------------------------
>
>
> It seems that the traceback list in the condition object is incomplete as
> line # 2 is missing from it.
> Is this intentional or a bug? If intentional, how could one get at that line
> from the condition object?
>
> ---rony
>
>
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