* generic/tclExecute.c: [Bug 3057639]. Applied patch by Jeff to

	* generic/tclVar.c: make the behaviour of lappend in bytecompiled
	* tests/append.test: mode consistent with direct-eval and 'append'
	* tests/appendComp.test: generally. Added tests (append*-9.*)
	showing the difference.

1 files changed, 52 insertions, 1 deletions

diff --git a/tests/append.test b/tests/append.test
index 312bc09..1d82a99 100644
--- a/tests/append.test
+++ b/tests/append.test
@@ -11,7 +11,7 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
-# RCS: @(#) $Id: append.test,v 1.7.12.1 2006/10/05 11:44:04 msofer Exp $
+# RCS: @(#) $Id: append.test,v 1.7.12.2 2010/09/01 20:36:20 andreas_kupries Exp $
 
 if {[lsearch [namespace children] ::tcltest] == -1} {
     package require tcltest
@@ -232,6 +232,57 @@ test append-7.5 {append var does not trigger read trace} {
 } {0}
 
 
+
+# New tests for bug 3057639 to show off the more consistent behaviour
+# of lappend in both direct-eval and bytecompiled code paths (see
+# appendComp.test for the compiled variants). lappend now behaves like
+# append. 9.0/1 lappend - 9.2/3 append
+
+test append-9.0 {bug 3057639, lappend direct eval, read trace on non-existing array variable element} {
+    catch {unset myvar}
+    array set myvar {}
+    proc nonull {var key val} {
+	upvar 1 $var lvar
+	if {![info exists lvar($key)]} {
+	    return -code error "no such variable"
+	}
+    }
+    trace add variable myvar read nonull
+    list [catch {
+	lappend myvar(key) "new value"
+    } msg] $msg
+} {0 {{new value}}}
+
+test append-9.1 {bug 3057639, lappend direct eval, read trace on non-existing env element} {
+    catch {unset ::env(__DUMMY__)}
+    list [catch {
+	lappend ::env(__DUMMY__) "new value"
+    } msg] $msg
+} {0 {{new value}}}
+
+test append-9.2 {bug 3057639, append direct eval, read trace on non-existing array variable element} {
+    catch {unset myvar}
+    array set myvar {}
+    proc nonull {var key val} {
+	upvar 1 $var lvar
+	if {![info exists lvar($key)]} {
+	    return -code error "no such variable"
+	}
+    }
+    trace add variable myvar read nonull
+    list [catch {
+	append myvar(key) "new value"
+    } msg] $msg
+} {0 {new value}}
+
+test append-9.3 {bug 3057639, append direct eval, read trace on non-existing env element} {
+    catch {unset ::env(__DUMMY__)}
+    list [catch {
+	append ::env(__DUMMY__) "new value"
+    } msg] $msg
+} {0 {new value}}
+
+
 catch {unset i x result y}
 catch {rename foo ""}
 catch {rename check ""}