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Truly bad error message from dumping a derivation directly into builtins.readFile #639

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opened 2025-01-22 19:50:20 +00:00 by jade · 2 comments
jade commented 2025-01-22 19:50:20 +00:00
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 » nix build --expr 'let foo = builtins.derivation { system = "aarch64-darwin"; name = "foo"; builder = "/bin/sh"; args = ["-c" "> $out"]; }; in builtins.readFile foo'
error:
       … while evaluating the attribute ''

       error: string '' has 0 entries in its context. It should only have exactly one entry

What even?! What is this doing? Is it doing some impressive CLI misparse or something?

``` » nix build --expr 'let foo = builtins.derivation { system = "aarch64-darwin"; name = "foo"; builder = "/bin/sh"; args = ["-c" "> $out"]; }; in builtins.readFile foo' error: … while evaluating the attribute '' error: string '' has 0 entries in its context. It should only have exactly one entry ``` What even?! What is this *doing*? Is it doing some impressive CLI misparse or something?
jade added this to the Error reporting project 2025-01-22 19:50:20 +00:00
jade changed title from Truly bad error message from setting post-build-hook to nonsense to Truly bad error message from dumping a derivation directly into builtins.readFile 2025-01-22 19:51:50 +00:00
jade commented 2025-01-22 19:54:05 +00:00
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repros on cppnix 2.24, Lix 2.91. it's an old bug at least.

repros on cppnix 2.24, Lix 2.91. it's an old bug at least.
jade commented 2025-01-23 00:17:56 +00:00
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oh, it's this one #74

oh, it's this one https://git.lix.systems/lix-project/lix/issues/74
jade closed this issue 2025-01-23 00:17:56 +00:00
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