promopt: let "stderr" pass through to tty in evaluating "PS0"

memo/ChangeLog.md

@@ -27,8 +27,8 @@
 - syntax: support tilde expansions in parameter expansions `#D1513` 0506df2
 - decode: support `ble-bind -m KEYMAP --cursor DECSCUSR` (motivated by jmederosalvarado) `#D1514` `#D1515` `#D1516` 79d671d
 - edit: support `nsearch` options (motivated by Alyetama, rashil2000, carv-silva) `#D1517` 9125795
-- syntax: support the deprecated redirection `>& file` `#D1539` 0000000
-- complete: complete file descriptors and heredoc words after redirections `#D1539` 0000000
+- syntax: support the deprecated redirection `>& file` `#D1539` b9b0de4
+- complete: complete file descriptors and heredoc words after redirections `#D1539` b9b0de4
 
 ## Changes
 
@@ -58,6 +58,7 @@
   - util (`ble/util/type`): fix a bug that aliases are not properly highlighted (reported by 3ximus) `#D1526` 45b30a7
 - syntax (`ble/syntax:bash/simple-word/eval`): optimize large array passing (motivated by timjrd) `#D1522` c89aa23
 - main: accept non-regular files as `blerc` and add option `--norc` `#D1530` 7244e2f
+- promopt: let `stderr` pass through to tty in evaluating `PS0` (reported by tycho-kirchner) `#D1531` 0000000
 
 ## Fixes
 

note.txt

@@ -4405,6 +4405,14 @@ bash_tips
 
 2021-05-10
 
+  * syntax: PS0 から stderr に出力できないという報告を受けた (reported by tycho-kirchner) [#D1541]
+    https://github.com/akinomyoga/ble.sh/issues/107
+
+    一体何をしたいのか謎だがまあ元の bash で動く以上はその動作を利用する設定も
+    あるだろう。元々その様に実装していたのは set -x の出力を防ぐ為だったが、よ
+    く見たら PS0 の出力は restore-bash-options の前だったのでこの段階では 2 を
+    端末に出力しても OK.
+
   * 2021-03-21 gitstatus.plugin.sh の alias builtin で builtin eval 他が破壊されている [#D1540]
     https://github.com/akinomyoga/ble.sh/issues/93
     https://github.com/romkatv/gitstatus/pull/235

src/edit.sh

@@ -4998,7 +4998,7 @@ function ble-edit/exec:gexec/.prologue {
   _ble_edit_exec_INT=0
   ble/util/joblist.clear
   ble-edit/exec:gexec/invoke-hook-with-setexit PREEXEC "$_ble_edit_exec_BASH_COMMAND" &>/dev/tty
-  ble-edit/exec/print-PS0 >&31
+  ble-edit/exec/print-PS0 >&31 2>&32
   ble-edit/exec/restore-BASH_REMATCH
   ble/base/restore-bash-options
   ble/base/restore-POSIXLY_CORRECT