This is METAFONT, Version 0.0 (INIMF)
** &trap  trap 
(trap.mf
\*//*\trap\pass2!
! Missing symbolic token inserted.
<inserted text> 
                 INACCESSIBLE
<to be read again> 
                   7
l.21 ...t next=\; delimiters ↑~7
                                 fi
! Extra tokens will be flushed.
<to be read again> 
                   7
l.21 ...t next=\; delimiters ↑~7
                                 fi
! Forbidden token found while scanning to the end of the statement.
<inserted text> 
                ;
<to be read again> 
                   \
l.22 next\
          ; % the second pass will now compute silently; the ...

hello again, but
! Variable p3~ should have been defined.
<for...> ...o again, but";save.p
                                ;def.f.expr.x=let)=];let[=(;s...
<inserted text> endfor
                      
<to be read again> 
                   endtext
l.157 bye endtext
                 
>> _1
! OK.
<for...> ...ow._.enddef;f.xx[1);
                                begingroup.showstats;showall....
<inserted text> endfor
                      
<to be read again> 
                   endtext
l.157 bye endtext
                 
Memory usage 1407&364 (max 2059&435)
String usage 27&107 (max 54&3698)
! OK.
<for...> ...egingroup.showstats;
                                showall.nullpen;tracingonline...
<inserted text> endfor
                      
<to be read again> 
                   endtext
l.157 bye endtext
                 
>> pen (see the transcript file)
! OK.
<for...> ...ats;showall.nullpen;
                                tracingonline:=1;showalldepen...
<inserted text> endfor
                      
<to be read again> 
                   endtext
l.157 bye endtext
                 
{showalldependencies}
! OK.
<for...> ...showalldependencies;
                                bye ENDFOR
<inserted text> endfor
                      
<to be read again> 
                   endtext
l.157 bye endtext
                 
{[repeat the loop]}
! A group begun on line 157 never ended.
<to be read again> 
                   endtext
l.157 bye endtext
                 
{endgroup}
(end occurred when else on line 93 was incomplete)
(end occurred when if on line 36 was incomplete)
(end occurred when elseif on line 21 was incomplete)
(see the transcript file for additional information)
(illegal design size has been changed to 128pt)
(some chardp values had to be adjusted by as much as 0.5pt)
(4 font metric dimensions had to be decreased)
Font metrics written on trap.tfm
Output written on trap.gf (5 characters, 900 bytes).
Transcript written on trap.log.