the empty string is only a valid regex when built with libstdc++ and not with libc++ #7208
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I also encountered this issue (when struggling with https://github.com/nix-community/home-manager/blob/master/modules/services/gpg-agent.nix#L51). Consisteny between platforms should be important for Nix. Since libc++ and libstdc++ are not consistent, maybe we can
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SharzyL
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May 14, 2024
`splitString "" "some string"` would throw exception `error: invalid regular expression` on Darwin (or accurately, on Nix built against libc++). Refer to NixOS/nix#7208 for details. Before Nix handles that issue correctly, we should refrain from using `splitString ""`, and luckliy `lib.stringAsChars` can do the same thing.
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SharzyL
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May 28, 2024
`splitString "" "some string"` would throw exception `error: invalid regular expression` on Darwin (or accurately, on Nix built against libc++). Refer to NixOS/nix#7208 for details. Before Nix handles that issue correctly, we should refrain from using `splitString ""`, and luckliy `lib.stringAsChars` can do the same thing.
rycee
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May 28, 2024
`splitString "" "some string"` would throw exception `error: invalid regular expression` on Darwin (or accurately, on Nix built against libc++). Refer to NixOS/nix#7208 for details. Before Nix handles that issue correctly, we should refrain from using `splitString ""`, and luckliy `lib.stringAsChars` can do the same thing.
pasqui23
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Jun 3, 2024
`splitString "" "some string"` would throw exception `error: invalid regular expression` on Darwin (or accurately, on Nix built against libc++). Refer to NixOS/nix#7208 for details. Before Nix handles that issue correctly, we should refrain from using `splitString ""`, and luckliy `lib.stringAsChars` can do the same thing.
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Describe the bug
builtins.match "" ""evaluates only on linux and on darwin. This seems silly but leads to problems, see NixOS/nixpkgs#177273 (comment)Steps To Reproduce
nix replbuiltins.match "" ""[]on linux anderror: invalid regular expression ''on darwinExpected behavior
Same behavior. An error is probably a better idea but I wonder for backward compatibility. The issue I link suggests such an abuse in nixpkgs would have been noticed, so the worry about backward compat is only for other code bases.
nix-env --versionoutputnix-env (Nix) 2.8.1
Additional context
NixOS/nixpkgs#197374
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