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-rwxr-xr-xMaster/texmf-dist/scripts/texlive/fmtutil.pl7
1 files changed, 6 insertions, 1 deletions
diff --git a/Master/texmf-dist/scripts/texlive/fmtutil.pl b/Master/texmf-dist/scripts/texlive/fmtutil.pl
index 03183d69970..c8288f670cf 100755
--- a/Master/texmf-dist/scripts/texlive/fmtutil.pl
+++ b/Master/texmf-dist/scripts/texlive/fmtutil.pl
@@ -383,6 +383,11 @@ sub log_to_status {
sub callback_build_formats {
my ($what, $whatarg) = @_;
+ # sometimes (missing, all) there is no argument passed.
+ # Avoid warning from undef value being logged.
+ # https://tug.org/pipermail/tex-live/2023-September/049526.html
+ $whatarg = "" if ! defined $whatarg;
+
# set up a tmp dir
# On W32 it seems that File::Temp creates restrictive permissions (ok)
# that are copied over with the files created inside it (not ok).
@@ -1478,7 +1483,7 @@ Options:
--force (does nothing, exists for compatibility)
--test (does nothing, exists for compatibility)
-Commands:
+Commands (exactly one must be specified):
--all recreate all format files
--missing create all missing format files
--byengine ENGINE (re)create formats built with ENGINE