2024-03-05 05:58:29 +00:00
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---
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synopsis: Nested debuggers are no longer supported
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prs: 9920
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2024-05-15 02:14:58 +00:00
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credits: 9999years
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category: Improvements
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2024-03-05 05:58:29 +00:00
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---
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Previously, evaluating an expression that throws an error in the debugger would
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enter a second, nested debugger:
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```
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nix-repl> builtins.throw "what"
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error: what
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Starting REPL to allow you to inspect the current state of the evaluator.
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Welcome to Nix 2.18.1. Type :? for help.
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nix-repl>
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```
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Now, it just prints the error message like `nix repl`:
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```
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nix-repl> builtins.throw "what"
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error:
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… while calling the 'throw' builtin
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at «string»:1:1:
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1| builtins.throw "what"
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| ^
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error: what
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```
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