git-gui: Fix bind errors when switching repository chooser panels

We need to remove any variable traces we may have installed
when the panel is destroyed as the trace may attempt to use
a widget that no longer exists on this panel.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

diff --git a/lib/choose_repository.tcl b/lib/choose_repository.tcl
index 46d5b77c006b896472bda2d87f6cbc47f1084824..ab8e620c70bbaecd0397dd497c218f282da5ed92 100644 (file)
--- a/lib/choose_repository.tcl
+++ b/lib/choose_repository.tcl
@@ -352,6 +352,7 @@ method _do_new {} {
        pack $w_body.where -fill x
 
        trace add variable @local_path write [cb _write_local_path]
+       bind $w_body.h <Destroy> [list trace remove variable @local_path write [cb _write_local_path]]
        update
        focus $w_body.where.t
 }
@@ -477,6 +478,10 @@ method _do_clone {} {
 
        trace add variable @local_path write [cb _update_clone]
        trace add variable @origin_url write [cb _update_clone]
+       bind $w_body.h <Destroy> "
+               [list trace remove variable @local_path write [cb _update_clone]]
+               [list trace remove variable @origin_url write [cb _update_clone]]
+       "
        update
        focus $args.origin_t
 }
@@ -948,6 +953,7 @@ method _do_open {} {
        pack $w_body.where -fill x
 
        trace add variable @local_path write [cb _write_local_path]
+       bind $w_body.h <Destroy> [list trace remove variable @local_path write [cb _write_local_path]]
        update
        focus $w_body.where.t
 }