From 4a9817b21ee39dac55853654a550c4573727c420 Mon Sep 17 00:00:00 2001
From: Cocoon-Break <54054995+kuishou68@users.noreply.github.com>
Date: Sun, 19 Apr 2026 09:18:37 +0800
Subject: [PATCH] fix: correct wrong variable in error message in
 compose/values_merge.go

When vs[i+1].(streamReader) fails, the error incorrectly reports
reflect.TypeOf(vs[i]) (the previous element) instead of reflect.TypeOf(vs[i+1])
(the element that actually failed the type assertion).

Fixes #974
---
 compose/values_merge.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compose/values_merge.go b/compose/values_merge.go
index c08a12eb2..3fb7ee739 100644
--- a/compose/values_merge.go
+++ b/compose/values_merge.go
@@ -57,7 +57,7 @@ func mergeValues(vs []any, opts *mergeOptions) (any, error) {
 			sri, ok_ := vs[i+1].(streamReader)
 			if !ok_ {
 				return nil, fmt.Errorf("(mergeStream) unexpected type. "+
-					"expect: %v, got: %v", t0, reflect.TypeOf(vs[i]))
+					"expect: %v, got: %v", t0, reflect.TypeOf(vs[i+1]))
 			}
 
 			if st := sri.getChunkType(); st != t {