Fix running with empty PATH

3 files changed, 4 insertions, 4 deletions

diff --git a/src/luarocks/cmd.lua b/src/luarocks/cmd.lua
index 9077652a..c8bcb552 100644
--- a/src/luarocks/cmd.lua
+++ b/src/luarocks/cmd.lua
@@ -179,7 +179,7 @@ end
 local function search_lua_in_path(lua_version, verbose)
    local path_sep = (package.config:sub(1, 1) == "\\" and ";" or ":")
    local all_tried = {}
-   for bindir in os.getenv("PATH"):gmatch("[^"..path_sep.."]+") do
+   for bindir in (os.getenv("PATH") or ""):gmatch("[^"..path_sep.."]+") do
       local parentdir = dir.path((bindir:gsub("[\\/][^\\/]+[\\/]?$", "")))
       local detected, tried = util.find_lua(parentdir, lua_version)
       if detected then
diff --git a/src/luarocks/cmd/path.lua b/src/luarocks/cmd/path.lua
index 0038070b..9d6a8217 100644
--- a/src/luarocks/cmd/path.lua
+++ b/src/luarocks/cmd/path.lua
@@ -45,8 +45,8 @@ function path_cmd.command(args)
       return true
    end
 
-   local clean_path = util.cleanup_path(os.getenv("PATH"), path_sep, nil, true)
-   
+   local clean_path = util.cleanup_path(os.getenv("PATH") or "", path_sep, nil, true)
+
    if args.append then
       lr_path = package.path .. ";" .. lr_path
       lr_cpath = package.cpath .. ";" .. lr_cpath
diff --git a/src/luarocks/core/sysdetect.lua b/src/luarocks/core/sysdetect.lua
index 81e62076..534ab89f 100644
--- a/src/luarocks/core/sysdetect.lua
+++ b/src/luarocks/core/sysdetect.lua
@@ -397,7 +397,7 @@ function sysdetect.detect(input_file)
             -- interpreter path is absolute
             table.insert(files, interp)
          else
-            for d in os.getenv("PATH"):gmatch("[^"..PATHsep.."]+") do
+            for d in (os.getenv("PATH") or ""):gmatch("[^"..PATHsep.."]+") do
                table.insert(files, d .. dirsep .. interp)
             end
          end