272db8af1b
This does not add missing release notes, and it doesn't do anything about the profiles feature we would really like to have so we can have consistent credit. Change-Id: I72a6f7acfcff85f380be17dac76501a6f4693776
34 lines
837 B
Markdown
34 lines
837 B
Markdown
---
|
|
synopsis: Better error reporting for `with` expressions
|
|
prs: 9658
|
|
cls: 207
|
|
credits: horrors
|
|
category: Improvements
|
|
---
|
|
|
|
`with` expressions using non-attrset values to resolve variables are now reported with proper positions.
|
|
|
|
Previously an incorrect `with` expression would report no position at all, making it hard to determine where the error originated:
|
|
|
|
```
|
|
nix-repl> with 1; a
|
|
error:
|
|
… <borked>
|
|
|
|
at «none»:0: (source not available)
|
|
|
|
error: value is an integer while a set was expected
|
|
```
|
|
|
|
Now position information is preserved and reported as with most other errors:
|
|
|
|
```
|
|
nix-repl> with 1; a
|
|
error:
|
|
… while evaluating the first subexpression of a with expression
|
|
at «string»:1:1:
|
|
1| with 1; a
|
|
| ^
|
|
|
|
error: expected a set but found an integer: 1
|
|
```
|