#1857 corruption in command delete traces

[Donal K. Fellows]

Yuck. With a recent build of Tcl (not quite the HEAD)
I found this:
% proc bar {ctx from to op} {
puts [incr ::i]:[info level 0]
rename $from {}
}
% proc foo args {}
% trace add command foo delete "bar 1"
% trace add command foo delete "bar 2"
% trace add command foo delete "bar 3"
% rename foo {}
1:bar 3 foo {} delete
2:bar 2 foo {} delete
3:bar 1 elete {} delete
Looks like there's some memory corruption in there!

[miguel sofer]

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Could this be related to Bug #484200?

[Donal K. Fellows]

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Beats me! If I knew exactly what was wrong, I'd fix it
myself... :^)

[miguel sofer]

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The issue seems to be duplicated in Bug #589863, which has
more info.