pacman exit code 1

[silverqx]

When the msys/msys2-runtime and msys/pacman-mirrors are updated, then at the end pacman offers to close the terminal to complete the update, when I press yes, then it returns exit 1.
But exit 1 means error, shouldn't return 0?

The whole output looks like this:

user@example MSYS ~
$ pacman -Syuu
:: Synchronizing package databases...
 mingw32                                     1419.8 KiB   911 KiB/s 00:02 [#########################################] 100%
 mingw64                                     1427.0 KiB  1083 KiB/s 00:01 [#########################################] 100%
 ucrt64                                      1564.5 KiB  1044 KiB/s 00:01 [#########################################] 100%
 clang64                                     1470.5 KiB  1038 KiB/s 00:01 [#########################################] 100%
 msys                                         373.5 KiB   316 KiB/s 00:01 [#########################################] 100%
:: Starting core system upgrade...
warning: terminate other MSYS2 programs before proceeding
resolving dependencies...
looking for conflicting packages...

Package (2)          Old Version  New Version  Net Change  Download Size

msys/msys2-runtime   3.3.3-3      3.3.3-4        0.00 MiB       3.21 MiB
msys/pacman-mirrors  20211213-1   20211230-1     0.00 MiB       0.00 MiB

Total Download Size:    3.21 MiB
Total Installed Size:  11.51 MiB
Net Upgrade Size:       0.01 MiB

:: Proceed with installation? [Y/n] y
:: Retrieving packages...
 pacman-mirrors-20211230-1-any                  3.9 KiB  7.60 KiB/s 00:01 [#########################################] 100%
 msys2-runtime-3.3.3-4-x86_64                   3.2 MiB   562 KiB/s 00:06 [#########################################] 100%
 Total (2/2)                                    3.2 MiB   526 KiB/s 00:06 [#########################################] 100%
(2/2) checking keys in keyring                                            [#########################################] 100%
(2/2) checking package integrity                                          [#########################################] 100%
(2/2) loading package files                                               [#########################################] 100%
(2/2) checking for file conflicts                                         [#########################################] 100%
(2/2) checking available disk space                                       [#########################################] 100%
:: Processing package changes...
(1/2) upgrading msys2-runtime                                             [#########################################] 100%
(2/2) upgrading pacman-mirrors                                            [#########################################] 100%
:: To complete this update all MSYS2 processes including this terminal will be closed. Confirm to proceed [Y/n] y
SUCCESS: The process with PID 19392 has been terminated.

[process exited with code 1 (0x00000001)]