6 files changed, 8 insertions, 28 deletions

diff --git a/src/libstore/binary-cache-store.cc b/src/libstore/binary-cache-store.cc
index 9682db730..4bcb2c93b 100644
--- a/src/libstore/binary-cache-store.cc
+++ b/src/libstore/binary-cache-store.cc
@@ -143,7 +143,7 @@ struct FileSource : FdSource
 void BinaryCacheStore::addToStore(const ValidPathInfo & info, Source & narSource,
     RepairFlag repair, CheckSigsFlag checkSigs)
 {
-    assert(info.narHash && info.narSize);
+    assert(info.narSize);
 
     if (!repair && isValidPath(info.path)) {
         // FIXME: copyNAR -> null sink
diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index 3542904bf..fc0630cae 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -920,7 +920,7 @@ void LocalStore::registerValidPaths(const ValidPathInfos & infos)
         StorePathSet paths;
 
         for (auto & i : infos) {
-            assert(i.narHash && i.narHash.type == htSHA256);
+            assert(i.narHash.type == htSHA256);
             if (isValidPath_(*state, i.path))
                 updatePathInfo(*state, i);
             else
@@ -984,9 +984,6 @@ const PublicKeys & LocalStore::getPublicKeys()
 void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
     RepairFlag repair, CheckSigsFlag checkSigs)
 {
-    if (!info.narHash)
-        throw Error("cannot add path '%s' because it lacks a hash", printStorePath(info.path));
-
     if (requireSigs && checkSigs && !info.checkSignatures(*this, getPublicKeys()))
         throw Error("cannot add path '%s' because it lacks a valid signature", printStorePath(info.path));
 
diff --git a/src/libstore/nar-info.cc b/src/libstore/nar-info.cc
index cadaf6267..3a9121679 100644
--- a/src/libstore/nar-info.cc
+++ b/src/libstore/nar-info.cc
@@ -76,7 +76,7 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
 
     if (compression == "") compression = "bzip2";
 
-    if (!havePath || url.empty() || narSize == 0 || !narHash) throw corrupt();
+    if (!havePath || url.empty() || narSize == 0) throw corrupt();
 }
 
 std::string NarInfo::to_string(const Store & store) const
@@ -89,7 +89,7 @@ std::string NarInfo::to_string(const Store & store) const
     assert(fileHash && fileHash->type == htSHA256);
     res += "FileHash: " + fileHash->to_string(Base32, true) + "\n";
     res += "FileSize: " + std::to_string(fileSize) + "\n";
-    assert(narHash && narHash.type == htSHA256);
+    assert(narHash.type == htSHA256);
     res += "NarHash: " + narHash.to_string(Base32, true) + "\n";
     res += "NarSize: " + std::to_string(narSize) + "\n";
 
diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index aead3468a..997af1195 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -725,20 +725,6 @@ void copyStorePath(ref<Store> srcStore, ref<Store> dstStore,
         info = info2;
     }
 
-    if (!info->narHash) {
-        StringSink sink;
-        srcStore->narFromPath({storePath}, sink);
-        auto info2 = make_ref<ValidPathInfo>(*info);
-        info2->narHash = hashString(htSHA256, *sink.s);
-        if (!info->narSize) info2->narSize = sink.s->size();
-        if (info->ultimate) info2->ultimate = false;
-        info = info2;
-
-        StringSource source(*sink.s);
-        dstStore->addToStore(*info, source, repair, checkSigs);
-        return;
-    }
-
     if (info->ultimate) {
         auto info2 = make_ref<ValidPathInfo>(*info);
         info2->ultimate = false;
@@ -910,8 +896,8 @@ string showPaths(const PathSet & paths)
 
 std::string ValidPathInfo::fingerprint(const Store & store) const
 {
-    if (narSize == 0 || !narHash)
-        throw Error("cannot calculate fingerprint of path '%s' because its size/hash is not known",
+    if (narSize == 0)
+        throw Error("cannot calculate fingerprint of path '%s' because its size is not known",
             store.printStorePath(path));
     return
         "1;" + store.printStorePath(path) + ";"
diff --git a/src/libutil/hash.hh b/src/libutil/hash.hh
index 0520c6022..6d6eb70ca 100644
--- a/src/libutil/hash.hh
+++ b/src/libutil/hash.hh
@@ -59,9 +59,6 @@ private:
     Hash(std::string_view s, HashType type, bool isSRI);
 
 public:
-    /* Check whether a hash is set. */
-    operator bool () const { return (bool) type; }
-
     /* Check whether two hash are equal. */
     bool operator == (const Hash & h2) const;
 
diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc
index a901261f4..cc104bf35 100644
--- a/src/nix-store/nix-store.cc
+++ b/src/nix-store/nix-store.cc
@@ -372,7 +372,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
                 for (auto & j : maybeUseOutputs(store->followLinksToStorePath(i), useOutput, forceRealise)) {
                     auto info = store->queryPathInfo(j);
                     if (query == qHash) {
-                        assert(info->narHash && info->narHash.type == htSHA256);
+                        assert(info->narHash.type == htSHA256);
                         cout << fmt("%s\n", info->narHash.to_string(Base32, true));
                     } else if (query == qSize)
                         cout << fmt("%d\n", info->narSize);
@@ -862,7 +862,7 @@ static void opServe(Strings opFlags, Strings opArgs)
                         out << info->narSize // downloadSize
                             << info->narSize;
                         if (GET_PROTOCOL_MINOR(clientVersion) >= 4)
-                            out << (info->narHash ? info->narHash.to_string(Base32, true) : "")
+                            out << info->narHash.to_string(Base32, true)
                                 << renderContentAddress(info->ca)
                                 << info->sigs;
                     } catch (InvalidPath &) {