[tex-live] cygwin64 pdftex and luatex non function after todays update

[David Carlisle]

I did tlmgr --all this morning and since then pdftex and luatex are
non functional

$ pwd
/usr/local/texlive/2018/bin/x86_64-cygwin

$ file ./pdftex.exe
./pdftex.exe: PE32+ executable (console) x86-64 (stripped to external
PDB), for MS Windows

$ ./pdftex.exe

That is, it just terminates: no error message


$ ls -ltr *tex.exe
-rwxr-xr-x 1 davidc Domain Users   168960 Mar  4  2018 synctex.exe
-rwxr-xr-x 1 davidc Domain Users    51712 Mar  4  2018 detex.exe
-rwxr-xr-x 1 davidc Domain Users    61952 Mar  4  2018 chktex.exe
-rwxr-xr-x 1 davidc Domain Users   104960 Mar  4  2018 bibtex.exe
-rwxr-xr-x 1 davidc Domain Users   318976 Mar 19  2018 tex.exe
-rwxr-xr-x 1 davidc Domain Users 23974400 Apr  6 14:25 xetex.exe
-rwxr-xr-x 1 davidc Domain Users   439808 May  9 13:43 uptex.exe
-rwxr-xr-x 1 davidc Domain Users   113664 May  9 13:43 upbibtex.exe
-rwxr-xr-x 1 davidc Domain Users   432128 May  9 13:43 ptex.exe
-rwxr-xr-x 1 davidc Domain Users   108032 May  9 13:43 pbibtex.exe
-rwxr-xr-x 1 davidc Domain Users   513024 May  9 13:43 euptex.exe
-rwxr-xr-x 1 davidc Domain Users   505856 May  9 13:43 eptex.exe
-rwxr-xr-x 1 davidc Domain Users  2050048 Sep 19 22:00 pdftex.exe
-rwxr-xr-x 1 davidc Domain Users  8254464 Sep 19 22:00 luatex.exe
-rwxr-xr-x 1 davidc Domain Users  8183808 Sep 19 22:00 luajittex.exe


I tried rebooting to see if it was some shared dll issue but no difference.

Not sure what to try next (Word perhaps:-)


David