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Merge pull request #9917 from 9999years/enter-debugger-more-reliably

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Enter debugger more reliably in `let` expressions and function calls
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Théophane Hufschmitt 2024-02-08 10:09:54 +01:00 • committed by GitHub
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doc/manual/rl-next/enter-debugger-more-reliably-in-let-and-calls.md Normal file
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---
synopsis: The `--debugger` will start more reliably in `let` expressions and function calls
prs: 9917
issues: 6649
---
Previously, if you attempted to evaluate this file with the debugger:
```nix
let
a = builtins.trace "before inner break" (
builtins.break "hello"
);
b = builtins.trace "before outer break" (
builtins.break a
);
in
b
```
Nix would correctly enter the debugger at `builtins.break a`, but if you asked
it to `:continue`, it would skip over the `builtins.break "hello"` expression
entirely.
Now, Nix will correctly enter the debugger at both breakpoints.