[Tcl-bugs] [ tcl-Bugs-1103371 ] TclLookupSimpleVar Interp->globalNsPtr

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Bugs item #1103371, was opened at 2005-01-16 08:01
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110894&aid=1103371&group_id=10894

Category: 48. Embedding Support
Group: current: 8.4.9
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Don Porter (dgp)
Summary: TclLookupSimpleVar Interp->globalNsPtr

Initial Comment:
In tclvar.c::TclLookupSimpleVar(), I am getting a crash:

   Unhandled exception at 0x100a8526 (tcl84g.dll) in 
PBX.exe: 0xC0000005: 
Access violation reading location 0xfeeeffd6.

It looks like the cxtNsPtr has a value of 0xfeeefeee that 
it gets from 
<globalNsPtr>. Why would this variable have this 
question? I am not using 
namespaces, at least I am not knowingly doing anything 
with them or messing 
with them. I am using 8.4.9, Windows XP SP-2, MS 
VisualC++.net (2003)

    if ((cxtNsPtr->varResProc != NULL || iPtr-
>resolverPtr != NULL) && 
!(flags & LOOKUP_FOR_UPVAR))

    cxtNsPtr = 0xfeeefeee, cxtNsPtr->varResProc = ???? 
Flags = 0x00000001 
iPtr->resolverPtr is not null)

Here is the stack:

> tcl84g.dll!TclLookupSimpleVar(Tcl_Interp * 
interp=0x00e80b90, const char * 
> varName=0x00e80f00, int flags=0x00000001, const int 
create=0x00000001, 
> const char * * errMsgPtr=0x0012f3c8, int * 
indexPtr=0x0012f3c4) Line 710 + 
> 0x3 C

  tcl84g.dll!TclLookupVar(Tcl_Interp * 
interp=0x00e80b90, const char * 
part1=0x00e80f00, const char * part2=0x00000000, int 
flags=0x00000001, const 
char * msg=0x100e6874, int createPart1=0x00000001, 
int 
createPart2=0x00000001, Var * * 
arrayPtrPtr=0x0012f3fc) Line 270 + 0x1d C

  tcl84g.dll!Tcl_SetVar2Ex(Tcl_Interp * 
interp=0x00e80b90, const char * 
part1=0x00e80f00, const char * part2=0x00000000, 
Tcl_Obj * 
newValuePtr=0x00e96838, int flags=0x00000001) Line 
1462 + 0x22 C

  tcl84g.dll!Tcl_SetVar2(Tcl_Interp * 
interp=0x00e80b90, const char * 
part1=0x00e80f00, const char * part2=0x00000000, 
const char * 
newValue=0x0012f57c, int flags=0x00000001) Line 1398 
+ 0x19 C

  tcl84g.dll!Tcl_SetVar(Tcl_Interp * interp=0x00e80b90, 
const char * 
varName=0x00e80f00, const char * 
newValue=0x0012f57c, int flags=0x00000001) 
Line 1342 + 0x17 C

  PBX.exe!tclBase::setVar
(std::basic_string<char,std::char_traits<char>,std::alloc
ator<char> 
 > varName={...}, 
std::basic_string<char,std::char_traits<char>,std::alloca
tor<char> > 
value={...}) Line 90 + 0x2c C++

The last call of mine was to Tcl_SetVar( theTcl, 
varName.c_str(), 
value.c_str(), TCL_GLOBAL_ONLY ); both varName and 
value are both populated 
so it is getting <const char *> with actual values (not 
null) and theTcl is 
a result of Tcl_CreateInterp() followed by Tcl_Init().

For reference, I am calling Tcl_FindExecutable(), 
Tcl_CreateInterp(), and Tcl_Init(), in that order.

Any ideas?

Thanks

---Brian



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