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Diffstat (limited to 'doc/manual/rl-next/forbid-nested-debuggers.md')
| -rw-r--r-- | doc/manual/rl-next/forbid-nested-debuggers.md | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/doc/manual/rl-next/forbid-nested-debuggers.md b/doc/manual/rl-next/forbid-nested-debuggers.md new file mode 100644 index 000000000..a5924b24f --- /dev/null +++ b/doc/manual/rl-next/forbid-nested-debuggers.md @@ -0,0 +1,32 @@ +--- +synopsis: Nested debuggers are no longer supported +prs: 9920 +--- + +Previously, evaluating an expression that throws an error in the debugger would +enter a second, nested debugger: + +``` +nix-repl> builtins.throw "what" +error: what + + +Starting REPL to allow you to inspect the current state of the evaluator. + +Welcome to Nix 2.18.1. Type :? for help. + +nix-repl> +``` + +Now, it just prints the error message like `nix repl`: + +``` +nix-repl> builtins.throw "what" +error: + … while calling the 'throw' builtin + at «string»:1:1: + 1| builtins.throw "what" + | ^ + + error: what +``` |