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c { dg-do compile }
c { dg-options "-std=legacy" }
c
c SEGVs in loop.c with -O2.
character*80 function nxtlin(lun,ierr,itok)
character onechr*1,twochr*2,thrchr*3
itok=0
do while (.true.)
read (lun,'(a)',iostat=ierr) nxtlin
if (nxtlin(1:1).ne.'#') then
ito=0
do 10 it=1,79
if (nxtlin(it:it).ne.' ' .and. nxtlin(it+1:it+1).eq.' ')
$ then
itast=0
itstrt=0
do itt=ito+1,it
if (nxtlin(itt:itt).eq.'*') itast=itt
enddo
itstrt=ito+1
do while (nxtlin(itstrt:itstrt).eq.' ')
itstrt=itstrt+1
enddo
if (itast.gt.0) then
nchrs=itast-itstrt
if (nchrs.eq.1) then
onechr=nxtlin(itstrt:itstrt)
read (onechr,*) itokn
elseif (nchrs.eq.2) then
twochr=nxtlin(itstrt:itstrt+1)
read (twochr,*) itokn
elseif (nchrs.eq.3) then
thrchr=nxtlin(itstrt:itstrt+2)
read (thrchr,*) itokn
elseif (nchrs.eq.4) then
thrchr=nxtlin(itstrt:itstrt+3)
read (thrchr,*) itokn
endif
itok=itok+itokn
else
itok=itok+1
endif
ito=it+1
endif
10 continue
return
endif
enddo
return
end
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