Disallow transient/master cycles. Fix bgerror for Aqua to avoid hangs when an error occurs in an idle task run by [NSView drawRect].

1 files changed, 12 insertions, 2 deletions

diff --git a/tests/wm.test b/tests/wm.test
index af37c80..df8d325 100644
--- a/tests/wm.test
+++ b/tests/wm.test
@@ -1640,14 +1640,24 @@ test wm-transient-1.7 {usage} -returnCodes error -body {
     wm transient .master .master
 } -cleanup {
     deleteWindows
-} -result {can't make ".master" its own master}
+} -result {setting ".master" as master creates a transient/master cycle}
 test wm-transient-1.8 {usage} -returnCodes error -body {
+    toplevel .t1
+    toplevel .t2
+    toplevel .t3
+    wm transient .t2 .t1
+    wm transient .t3 .t2
+    wm transient .t1 .t3
+} -cleanup {
+    deleteWindows
+} -result {setting ".t3" as master creates a transient/master cycle}
+test wm-transient-1.9 {usage} -returnCodes error -body {
     toplevel .master
     frame .master.f
     wm transient .master .master.f
 } -cleanup {
     deleteWindows
-} -result {can't make ".master" its own master}
+} -result {setting ".master" as master creates a transient/master cycle}
 
 test wm-transient-2.1 {basic get/set of master} -setup {
     set results [list]