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Fix empty outputsToInstall for InstallableAttrPath

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Fixes assertion failure if outputsToInstall is empty by defaulting to the "out"
output. That is, behavior between the following commands should be consistent:

	$ nix build --no-link --json .#nothing-to-install-no-out
	error: derivation '/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-nothing-to-install-no-out.drv' does not have wanted outputs 'out'

	$ nix build --no-link --file default.nix --json nothing-to-install-no-out
	error: derivation '/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-nothing-to-install-no-out.drv' does not have wanted outputs 'out'

Real-world example of this issue:

	$ nix build --json .#.legacyPackages.aarch64-linux.texlive.pkgs.iwona
	error: derivation '/nix/store/dj0h6b0pnlnan5nidnhqa0bmzq4rv6sx-iwona-0.995b.drv' does not have wanted outputs 'out'

	$ git rev-parse HEAD
	eee33247cf6941daea8398c976bd2dda7962b125
	$ nix build --json --file . texlive.pkgs.iwona
	nix: src/libstore/outputs-spec.hh:46: nix::OutputsSpec::Names::Names(std::set<std::__cxx11::basic_string<char> >&&): Assertion `!empty()' failed.
	Aborted (core dumped)
This commit is contained in:
Ivan Trubach 2024-06-02 14:26:18 +03:00
parent 802b4e403b
commit 68090d7ff1
3 changed files with 16 additions and 0 deletions
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6
tests/functional/multiple-outputs.nix
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@ -96,6 +96,12 @@ rec {
buildCommand = "mkdir $a_a $b $c";
};
nothing-to-install = mkDerivation {
name = "nothing-to-install";
meta.outputsToInstall = [ ];
buildCommand = "mkdir $out";
};
independent = mkDerivation {
name = "multiple-outputs-independent";
outputs = [ "first" "second" ];