[bug #24048] [mm] infinite loop with certain page lengths

[Bjarni Ingi Gislason]

Follow-up Comment #5, bug #24048 (project groff):

  The mm-macros use the register 'L' (on the command line) or an
argument to the .PGFORM macro for page length.

  They use internally the register '@pl'.

  Using ".pl ..." in the input file just sets register '.p'
which does not affect register '@pl', as the macro file has already
been read.

  Changing "-r PL=" to "-r L=' runs the the example script error-free
until the page becomes shorter than reasonable.

  When using macro-packages, users should not use low level requests or
registers.


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