unison/unison-src/transcripts/fix-1381-excess-propagate.md
2020-03-23 19:09:01 -04:00

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We were seeing an issue where (it seemed) that every namespace that was visited during a propagate would get a new history node, even when it didn't contain any dependents.
Example:
```unison:hide
a = "a term"
X.foo = "a namespace"
```
```ucm
.> add
```
Here is an update which should not affect `X`:
```unison:hide
a = "an update"
```
```ucm
.> update
```
As of the time of this writing, the history for `X` should be a single node, `#4eeuo5bsfr`;
```ucm
.> history X
```
however, as of release/M1i, we saw an extraneous node appear. If your `ucm` is fixed, you won't see it below:
```ucm:error
.> history #7nl6ppokhg
```