Defer inside a for loop causes early exit #1849

What happened, and what did you expect to happen?

This is unexpected:

for v [a b c] {
  defer { put defered }
  put $v
}
▶ a
▶ defered

Output of "elvish -version"

0.22.0-dev.0.20241002144851-c20fac4126aa-dirty

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