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23 lines
639 B
Markdown
23 lines
639 B
Markdown
---
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synopsis: "C API: Errors returned from your primops are not treated as recoverable by default"
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prs: [13930]
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---
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Nix 2.32 by default remembers the error in the thunk that triggered it.
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Previously the following sequence of events worked:
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1. Have a thunk that invokes a primop that's defined through the C API
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2. The primop returns an error
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3. Force the thunk again
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4. The primop returns a value
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5. The thunk evaluated successfully
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**Resolution**
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C API consumers that rely on this must change their recoverable error calls:
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```diff
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-nix_set_err_msg(context, NIX_ERR_*, msg);
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+nix_set_err_msg(context, NIX_ERR_RECOVERABLE, msg);
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```
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