nix-copy-closure: Fix assertion failure

  $ ./inst/bin/nix-copy-closure --to bla $(type -p firefox)
  nix-copy-closure: src/libstore/store-api.cc:80: std::__cxx11::string nix::storePathToHash(const Path&): Assertion `base.size() >= storePathHashLen' failed.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/nix-copy-closure/nix-copy-closure.cc b/src/nix-copy-closure/nix-copy-closure.cc
index 4340443b5cc2..05a4deea3d55 100755
--- a/src/nix-copy-closure/nix-copy-closure.cc
+++ b/src/nix-copy-closure/nix-copy-closure.cc
@@ -51,8 +51,12 @@ int main(int argc, char ** argv)
         auto to = toMode ? openStore(remoteUri) : openStore();
         auto from = toMode ? openStore() : openStore(remoteUri);
 
+        PathSet storePaths2;
+        for (auto & path : storePaths)
+            storePaths2.insert(from->followLinksToStorePath(path));
+
         PathSet closure;
-        from->computeFSClosure(storePaths, closure, false, includeOutputs);
+        from->computeFSClosure(storePaths2, closure, false, includeOutputs);
 
         copyPaths(from, to, Paths(closure.begin(), closure.end()), useSubstitutes);
     });