[gcc r14-1967] ada: Fix -fdiagnostics-format=json not printing all messages

[Marc Poulhi?s <dkm@gcc.gnu.org>]

https://gcc.gnu.org/g:3404e481d09d49311ef74a8de15d8a72ed240cce

commit r14-1967-g3404e481d09d49311ef74a8de15d8a72ed240cce
Author: Ghjuvan Lacambre <lacambre@adacore.com>
Date:   Fri May 26 13:26:21 2023 +0200

    ada: Fix -fdiagnostics-format=json not printing all messages
    
    The previous version of this code stopped printing messages as soon as
    it encountered a deleted or continuation message. This was wrong,
    continuation and deleted messages can be followed by live messages that
    do need to be printed.
    
    gcc/ada/
    
            * errout.adb (Output_Messages): Fix loop termination condition.

Diff:
---
 gcc/ada/errout.adb | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/gcc/ada/errout.adb b/gcc/ada/errout.adb
index 1c6222b3a29..6e378a60731 100644
--- a/gcc/ada/errout.adb
+++ b/gcc/ada/errout.adb
@@ -3062,16 +3062,19 @@ package body Errout is
 
             E := Errors.Table (E).Next;
 
-            --  Skip deleted messages.
-            --  Also skip continuation messages, as they have already been
-            --  printed along the message they're attached to.
+            while E /= No_Error_Msg loop
+
+               --  Skip deleted messages.
+               --  Also skip continuation messages, as they have already been
+               --  printed along the message they're attached to.
+
+               if not Errors.Table (E).Deleted
+                 and then not Errors.Table (E).Msg_Cont
+               then
+                  Write_Char (',');
+                  Output_JSON_Message (E);
+               end if;
 
-            while E /= No_Error_Msg
-              and then not Errors.Table (E).Deleted
-              and then not Errors.Table (E).Msg_Cont
-            loop
-               Write_Char (',');
-               Output_JSON_Message (E);
                E := Errors.Table (E).Next;
             end loop;
          end if;