From 2c2da3750ba036b848e5b52f8f5614076b0d36d6 Mon Sep 17 00:00:00 2001
From: Joshua Thomas <joshua.thomas@gmail.com>
Date: Wed, 26 Nov 2025 20:57:30 -0800
Subject: [PATCH] ensuring args and vars maps are created before populating
 them

---
 settings.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/settings.go b/settings.go
index a3e600b..dc3b30c 100644
--- a/settings.go
+++ b/settings.go
@@ -366,12 +366,22 @@ func (s *settings) reflectTagOverrideArgs(out any, opts *ReadOptions, pFldNm ...
 		// read "arg" tag
 		arg := fld.Tag.Get("arg")
 		if arg != "" {
+			// ensure args map ready
+			if opts.ArgsMap == nil {
+				opts.ArgsMap = map[string]string{}
+			}
+
 			opts.ArgsMap[arg] = fldNm
 		}
 
 		// read "env" tag
 		env := fld.Tag.Get("env")
 		if env != "" {
+			// ensure we have a vars map ready
+			if opts.VarsMap == nil {
+				opts.VarsMap = map[string]string{}
+			}
+
 			opts.VarsMap[env] = fldNm
 		}
 	}