eldritch horrors
6b279cd10e
reduce the size of Env by one pointer
(cherry picked from commit 83f5622545a2fc31eb7e7d5105f64ed6dd3058b3)
Change-Id: I5636290526d0165cfc61aee1e7a5b94db4a26cef
32 lines
796 B
Markdown
32 lines
796 B
Markdown
---
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synopsis: Better error reporting for `with` expressions
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prs: 9658
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---
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`with` expressions using non-attrset values to resolve variables are now reported with proper positions.
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Previously an incorrect `with` expression would report no position at all, making it hard to determine where the error originated:
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```
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nix-repl> with 1; a
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error:
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… <borked>
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at «none»:0: (source not available)
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error: value is an integer while a set was expected
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```
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Now position information is preserved and reported as with most other errors:
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```
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nix-repl> with 1; a
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error:
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… while evaluating the first subexpression of a with expression
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at «string»:1:1:
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1| with 1; a
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| ^
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error: value is an integer while a set was expected
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```
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