4 files changed, 10 insertions, 9 deletions
diff --git a/src/buildtool/file_system/git_cas.hpp b/src/buildtool/file_system/git_cas.hpp
index 5c5a3f31..299f7a2f 100644
--- a/src/buildtool/file_system/git_cas.hpp
+++ b/src/buildtool/file_system/git_cas.hpp
@@ -68,7 +68,7 @@ class GitCAS {
     /// \param log_failure Log level at which to log failures accessing the
     /// object.
     [[nodiscard]] auto ReadObject(std::string const& id,
-                                  bool is_hex_id = false,
+                                  bool is_hex_id,
                                   LogLevel log_failure = LogLevel::Warning)
         const noexcept -> std::optional<std::string>;
 
@@ -79,7 +79,7 @@ class GitCAS {
     //    Note that most backends do not support reading only the header of an
     //    object, so the whole object will be read and then the header will be
     //    returned.
-    [[nodiscard]] auto ReadHeader(std::string const& id, bool is_hex_id = false)
+    [[nodiscard]] auto ReadHeader(std::string const& id, bool is_hex_id)
         const noexcept -> std::optional<std::pair<std::size_t, ObjectType>>;
 
   private:
diff --git a/src/buildtool/file_system/git_repo.cpp b/src/buildtool/file_system/git_repo.cpp
index c711510c..d63626a2 100644
--- a/src/buildtool/file_system/git_repo.cpp
+++ b/src/buildtool/file_system/git_repo.cpp
@@ -137,7 +137,7 @@ std::unordered_set<git_filemode_t> const kNonSpecialGitFileModes{
     return std::all_of(entries.begin(), entries.end(), [cas](auto entry) {
         auto const& [id, nodes] = entry;
         // if CAS given, check that the entry is in the object database
-        if (cas != nullptr and not cas->ReadHeader(id)) {
+        if (cas != nullptr and not cas->ReadHeader(id, /*is_hex_id=*/false)) {
             return false;
         }
         // for a given raw id, either all entries are trees or none of them
diff --git a/src/buildtool/file_system/git_tree.cpp b/src/buildtool/file_system/git_tree.cpp
index 3d1418f1..ded027c2 100644
--- a/src/buildtool/file_system/git_tree.cpp
+++ b/src/buildtool/file_system/git_tree.cpp
@@ -124,21 +124,21 @@ auto GitTree::LookupEntryByPath(
 }
 
 auto GitTree::Size() const noexcept -> std::optional<std::size_t> {
-    if (auto header = cas_->ReadHeader(raw_id_)) {
+    if (auto header = cas_->ReadHeader(raw_id_, /*is_hex_id=*/false)) {
         return header->first;
     }
     return std::nullopt;
 }
 
 auto GitTree::RawData() const noexcept -> std::optional<std::string> {
-    return cas_->ReadObject(raw_id_);
+    return cas_->ReadObject(raw_id_, /*is_hex_id=*/false);
 }
 
 auto GitTreeEntry::Blob() const noexcept -> std::optional<std::string> {
     if (not IsBlob()) {
         return std::nullopt;
     }
-    return cas_->ReadObject(raw_id_);
+    return cas_->ReadObject(raw_id_, /*is_hex_id=*/false);
 }
 
 auto GitTreeEntry::Tree(bool ignore_special) const& noexcept
@@ -164,12 +164,12 @@ auto GitTreeEntry::Tree(bool ignore_special) const& noexcept
 }
 
 auto GitTreeEntry::Size() const noexcept -> std::optional<std::size_t> {
-    if (auto header = cas_->ReadHeader(raw_id_)) {
+    if (auto header = cas_->ReadHeader(raw_id_, /*is_hex_id=*/false)) {
         return header->first;
     }
     return std::nullopt;
 }
 
 auto GitTreeEntry::RawData() const noexcept -> std::optional<std::string> {
-    return cas_->ReadObject(raw_id_);
+    return cas_->ReadObject(raw_id_, /*is_hex_id=*/false);
 }
diff --git a/src/buildtool/file_system/symlinks/resolve_symlinks_map.cpp b/src/buildtool/file_system/symlinks/resolve_symlinks_map.cpp
index d55ee19d..ddd266fa 100644
--- a/src/buildtool/file_system/symlinks/resolve_symlinks_map.cpp
+++ b/src/buildtool/file_system/symlinks/resolve_symlinks_map.cpp
@@ -154,7 +154,8 @@ void ResolveKnownEntry(GitObjectToResolve const& obj,
                     obj.pragma_special != PragmaSpecial::Ignore) {
                     // children info is known, so pass this forward
                     if (IsSymlinkObject(e.type)) {
-                        if (auto target = obj.source_cas->ReadObject(raw_id)) {
+                        if (auto target = obj.source_cas->ReadObject(
+                                raw_id, /*is_hex_id=*/false)) {
                             children_info.emplace_back(
                                 obj.root_tree_id,
                                 obj.rel_path / e.name,