3 files changed, 10 insertions, 8 deletions

diff --git a/src/luarocks/list.lua b/src/luarocks/list.lua
index fddded03..99868028 100644
--- a/src/luarocks/list.lua
+++ b/src/luarocks/list.lua
@@ -93,8 +93,8 @@ function list.run(...)
    
    local results = {}
    for _, tree in ipairs(trees) do
-      local ok, err = search.manifest_search(results, path.rocks_dir(tree), query)
-      if not ok then
+      local ok, err, errcode = search.manifest_search(results, path.rocks_dir(tree), query)
+      if not ok and errcode ~= "open" then
          util.warning(err)
       end
    end
diff --git a/src/luarocks/manif_core.lua b/src/luarocks/manif_core.lua
index d719caa2..87fc16cf 100644
--- a/src/luarocks/manif_core.lua
+++ b/src/luarocks/manif_core.lua
@@ -18,16 +18,18 @@ manif_core.manifest_cache = {}
 -- @param file string: The local filename of the manifest file.
 -- @param repo_url string: The repository identifier.
 -- @param quick boolean: If given, skips type checking.
+-- @return table or (nil, string, string): the manifest or nil,
+-- error message and error code ("open", "load", "run" or "type").
 function manif_core.manifest_loader(file, repo_url, quick)
-   local manifest, err = persist.load_into_table(file)
+   local manifest, err, errcode = persist.load_into_table(file)
    if not manifest then
-      return nil, "Failed loading manifest for "..repo_url..": "..err
+      return nil, "Failed loading manifest for "..repo_url..": "..err, errcode
    end
    local globals = err
    if not quick then
       local ok, err = type_check.type_check_manifest(manifest, globals)
       if not ok then
-         return nil, "Error checking manifest: "..err
+         return nil, "Error checking manifest: "..err, "type"
       end
    end
 
@@ -39,8 +41,8 @@ end
 -- All functions that use manifest tables assume they were obtained
 -- through either this function or load_manifest.
 -- @param repo_url string: URL or pathname for the repository.
--- @return table or (nil, string): A table representing the manifest,
--- or nil followed by an error message.
+-- @return table or (nil, string, string): A table representing the manifest,
+-- or nil followed by an error message and an error code, see manifest_loader.
 function manif_core.load_local_manifest(repo_url)
    assert(type(repo_url) == "string")
 
diff --git a/src/luarocks/search.lua b/src/luarocks/search.lua
index 5e6cf50e..a06fdd45 100644
--- a/src/luarocks/search.lua
+++ b/src/luarocks/search.lua
@@ -170,7 +170,7 @@ end
 -- If the arch field is omitted, the local architecture (cfg.arch)
 -- is used. The special value "any" is also recognized, returning all
 -- matches regardless of architecture.
--- @return true or, in case of errors, nil and an error message.
+-- @return true or, in case of errors, nil, an error message and an optional error code.
 function search.manifest_search(results, repo, query)
    assert(type(results) == "table")
    assert(type(repo) == "string")