From 23d0c1a0c0e324420e2b0a82d57740a0be9210ff Mon Sep 17 00:00:00 2001
From: ACA4DFA4 <29880332+ACA4DFA4@users.noreply.github.com>
Date: Wed, 26 Aug 2026 03:54:44 +0800
Subject: [PATCH] thecl: restore pre-th10 jump displacement regression

Pre-th9 ECL jump targets ('o' params) are displacements relative to the
emitting instruction, matching ZUN's originals and thtk's own dumper
(sub_name + instr->offset + value).

f0190b2 originally wrote the correct term, but the serializer rewrite in
5ad773c dropped the '- instr->offset', so every jump/loop compiled for
th06-th08 landed at an absolute sub offset instead; timelines (no 'o'
params) were unaffected. Restore the lost term.

Round-trip audit over all shipped stage scripts: th07 8/8 and th08
24/24 files corrupted before (1462 / 3085 findings); 0 after.
---
 thecl/thecl06.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/thecl/thecl06.c b/thecl/thecl06.c
index 7f6bada..7f71d2c 100644
--- a/thecl/thecl06.c
+++ b/thecl/thecl06.c
@@ -1592,7 +1592,7 @@ th06_serialize_data(
         case 'o':
             if (data_size < sizeof(int32_t))
                 return -1;
-            *(int32_t*)param_data = label_offset(sub, param->value.val.z);
+            *(int32_t*)param_data = label_offset(sub, param->value.val.z) - instr->offset;
             return sizeof(int32_t);
         case 't':
             if (data_size < sizeof(int32_t))