[Tcl-bugs] [ tcl-Bugs-2141271 ] Tcl_ParseCommand doesn't set errorInfo for a wrong command

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Bugs item #2141271, was opened at 2008-10-01 15:43
Message generated for change (Comment added) made by yurivict
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Category: 45. Parsing and Eval
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Yuri (yurivict)
Assigned to: Don Porter (dgp)
Summary: Tcl_ParseCommand doesn't set errorInfo for a wrong command

Initial Comment:
Please compile and run an attached .c file.

When run it prints an empty errorInfo obtained after a particular wrong command.

errorInfo should *always* be set if Tcl_ParseCommand returns and error.


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>Comment By: Yuri (yurivict)
Date: 2008-10-02 09:47

Message:
This is quite confusing that there are so many error message variables.


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Comment By: Yuri (yurivict)
Date: 2008-10-02 09:35

Message:
I see this problem in both tcl-8.4.19 and tcl-8.5.4 with a minor
difference.
In tcl-8.4.19 errorInfo is returned as an empty string and in tcl-8.5.4 --
as a null string.


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Comment By: Don Porter (dgp)
Date: 2008-10-02 09:31

Message:

Use 

const char *msg = Tcl_GetStringResult(interp);

to fix your code.

If you also want ::errorInfo set, you can
achieve that by adding

Tcl_AddErrorInfo(interp,"")

in the branch that handles the TCL_ERROR
return values.


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Comment By: Don Porter (dgp)
Date: 2008-10-02 09:29

Message:

See the docs for Tcl_ParseCommand:

"If an error  occurred  in  parsing the
command then TCL_ERROR is returned, an
error message is left in interps result,
and no information is left at *parsePtr."

You will find the error message in the
interp result, not in the ::errorInfo
variable.


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Comment By: Don Porter (dgp)
Date: 2008-10-02 08:57

Message:

Please report the version of Tcl
in which you see the problem.


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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110894&aid=2141271&group_id=10894