From 00ddb296ac164a55cc92f6c2ec0d0f6380981695 Mon Sep 17 00:00:00 2001
From: TermiNexus <wyt18222152539wyt@163.com>
Date: Sun, 11 Oct 2026 11:58:57 +0800
Subject: [PATCH] =?UTF-8?q?fix(narrow):=20=E5=AD=97=E8=8A=82=E7=BC=93?=
 =?UTF-8?q?=E5=86=B2=E5=86=99=20int/=E7=AE=97=E6=9C=AF=E7=BB=93=E6=9E=9C?=
 =?UTF-8?q?=E6=94=B9=E7=94=A8=20char(...)=EF=BC=88sys/=5Ffakeduck=EF=BC=89?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

sys.vp cmd 解析 ch:int 写 buf；_fakeduck ch±32 算术提升为 int。目标均为 bytes（i8），RHS 为 32 位，触发 32->8 隐式窄化。其余 for ch in <str> 形态 ch 是 char，同宽不报错
---
 _fakeduck.vp | 18 +++++++++---------
 sys.vp       |  2 +-
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/_fakeduck.vp b/_fakeduck.vp
index 8b90aed..74414f5 100644
--- a/_fakeduck.vp
+++ b/_fakeduck.vp
@@ -22,7 +22,7 @@ class _str:
         for i, ch in enumerate(src):
             if ch >= 97:
                 if ch <= 122:
-                    buf[i] = ch - 32
+                    buf[i] = char(ch - 32)
                 else:
                     buf[i] = ch
             else:
@@ -38,7 +38,7 @@ class _str:
         for i, ch in enumerate(src):
             if ch >= 65:
                 if ch <= 90:
-                    buf[i] = ch + 32
+                    buf[i] = char(ch + 32)
                 else:
                     buf[i] = ch
             else:
@@ -57,7 +57,7 @@ class _str:
                 first = False
                 if ch >= 97:
                     if ch <= 122:
-                        buf[i] = ch - 32
+                        buf[i] = char(ch - 32)
                     else:
                         buf[i] = ch
                 else:
@@ -65,7 +65,7 @@ class _str:
             else:
                 if ch >= 65:
                     if ch <= 90:
-                        buf[i] = ch + 32
+                        buf[i] = char(ch + 32)
                     else:
                         buf[i] = ch
                 else:
@@ -81,13 +81,13 @@ class _str:
         for i, ch in enumerate(src):
             if ch >= 97:
                 if ch <= 122:
-                    buf[i] = ch - 32
+                    buf[i] = char(ch - 32)
                 else:
                     buf[i] = ch
             else:
                 if ch >= 65:
                     if ch <= 90:
-                        buf[i] = ch + 32
+                        buf[i] = char(ch + 32)
                     else:
                         buf[i] = ch
                 else:
@@ -114,7 +114,7 @@ class _str:
                 if prev_alpha:
                     if ch >= 65:
                         if ch <= 90:
-                            buf[i] = ch + 32
+                            buf[i] = char(ch + 32)
                         else:
                             buf[i] = ch
                     else:
@@ -122,7 +122,7 @@ class _str:
                 else:
                     if ch >= 97:
                         if ch <= 122:
-                            buf[i] = ch - 32
+                            buf[i] = char(ch - 32)
                         else:
                             buf[i] = ch
                     else:
@@ -141,7 +141,7 @@ class _str:
         for i, ch in enumerate(src):
             if ch >= 65:
                 if ch <= 90:
-                    buf[i] = ch + 32
+                    buf[i] = char(ch + 32)
                 else:
                     buf[i] = ch
             else:
diff --git a/sys.vp b/sys.vp
index 4569988..87f420c 100644
--- a/sys.vp
+++ b/sys.vp
@@ -105,7 +105,7 @@ def _init_argv_win32():
                 argv_arr[argc] = str(buf + j)
                 argc += 1
                 in_arg = True
-            buf[j] = ch
+            buf[j] = char(ch)
             j += 1
     if in_arg: buf[j] = 0
     _argc = argc