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37 lines
741 B
Markdown
37 lines
741 B
Markdown
# Regression test for updates which conflict with an existing data constructor
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https://github.com/unisonweb/unison/issues/2786
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```ucm:hide
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scratch/main> builtins.merge lib.builtins
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```
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First we add a sum-type to the codebase.
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```unison
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structural type X = x
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```
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```ucm
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scratch/main> add
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```
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Now we update the type, changing the name of the constructors, _but_, we simultaneously
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add a new top-level term with the same name as the old constructor.
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```unison
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structural type X = y | z
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X.x : Text
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X.x = "some text that's not in the codebase"
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dependsOnX = Text.size X.x
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```
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This update should succeed since the conflicted constructor
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is removed in the same update that the new term is being added.
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```ucm
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scratch/main> update.old
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```
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