From f90702f93072076f02abec99ace8f3d09fdd0d9a Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Wed, 15 Apr 2026 18:55:51 +0000
Subject: [PATCH] =?UTF-8?q?fix:=20infra:=20`=5Fregen=5Ffile`=20does=20not?=
 =?UTF-8?q?=20restore=20stash=20if=20generator=20fails=20=E2=80=94=20compo?=
 =?UTF-8?q?se=20file=20lost=20at=20temp=20path=20(#784)?=
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 bin/disinto | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/bin/disinto b/bin/disinto
index 43fa35d..b16a7ed 100755
--- a/bin/disinto
+++ b/bin/disinto
@@ -1545,8 +1545,14 @@ _regen_file() {
     mv "$target" "$stashed"
   fi
 
-  # Run the generator — it writes $target from scratch
-  "$generator" "$@"
+  # Run the generator — it writes $target from scratch.
+  # If the generator fails, restore the stashed original so it is not stranded.
+  if ! "$generator" "$@"; then
+    if [ -n "$stashed" ]; then
+      mv "$stashed" "$target"
+    fi
+    return 1
+  fi
 
   if [ -z "$stashed" ]; then
     # No previous file — first generation