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| author | mig <mig> | 2011-04-13 13:19:36 (GMT) |
|---|---|---|
| committer | mig <mig> | 2011-04-13 13:19:36 (GMT) |
| commit | ff0738ff2d537d9c4d0d95d944bfd0a239baef8e (patch) | |
| tree | 50deca2ecd704224e4a4b8b3630167516f3ef751 /generic/tclVar.c | |
| parent | 37b1332c5e9a5098b66e6775c9073680f9cf94fa (diff) | |
| download | tcl-ff0738ff2d537d9c4d0d95d944bfd0a239baef8e.zip tcl-ff0738ff2d537d9c4d0d95d944bfd0a239baef8e.tar.gz tcl-ff0738ff2d537d9c4d0d95d944bfd0a239baef8e.tar.bz2 | |
fix for [Bug 2662380], crash caused by appending to a variable with a write trace that unsets it
Diffstat (limited to 'generic/tclVar.c')
| -rw-r--r-- | generic/tclVar.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/generic/tclVar.c b/generic/tclVar.c index 9815469..a1885b5 100644 --- a/generic/tclVar.c +++ b/generic/tclVar.c @@ -2554,13 +2554,14 @@ Tcl_AppendObjCmd( /* * Note that we do not need to increase the refCount of the Var * pointers: should a trace delete the variable, the return value - * of TclPtrSetVar will be NULL, and we will not access the - * variable again. + * of TclPtrSetVar will be NULL or emptyObjPtr, and we will not + * access the variable again. */ varValuePtr = TclPtrSetVar(interp, varPtr, arrayPtr, objv[1], NULL, objv[i], TCL_APPEND_VALUE|TCL_LEAVE_ERR_MSG, -1); - if (varValuePtr == NULL) { + if ((varValuePtr == NULL) || + (varValuePtr == ((Interp *) interp)->emptyObjPtr)) { return TCL_ERROR; } } |