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Add traceback to help debug "Arguments are not sufficiently instantiated" error from functor/2 from bad markup #6

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Add traceback to help debug "Arguments are not sufficiently instantiated" error from functor/2 from bad markup #6

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11 changes: 11 additions & 0 deletions latex2html.pl
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,7 @@
op(100, fx, #)
]).
:- use_module(library(debug),[debug/3]).
:- use_module(library(prolog_stack)). % For catch_with_backtrace
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@kamahen kamahen Feb 8, 2024

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The ordering of this use_module seems to be important.

:- autoload(library(apply),[maplist/3]).
:- autoload(library(backcomp),[convert_time/8]).
:- autoload(library(ctypes),
Expand Down Expand Up @@ -3224,6 +3225,16 @@
:- initialization(main, main).

main(Argv) :-
catch_with_backtrace(main0(Argv),
Error,
( set_prolog_flag(backtrace_goal_depth, 20),
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@kamahen kamahen Feb 8, 2024

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These 2 set_prolog_flag calls didn't have the desired effect ... but I couldn't find another flag for setting the option for the write.

This is what I got when running from cmake:

ERROR: [2,630] tex:item_commands([_484|_486],[],[_490|_492]) at /home/peter/src/swipl-devel/build.debug/home/library/ext/ltx2htm/latex2html.pl:983
ERROR: [1,904] tex:items([\(classitem,...),'\n'|...],[[...|...]|_554]) at /home/peter/src/swipl-devel/build.debug/home/library/ext/ltx2htm/latex2html.pl:961
ERROR: [1,890] tex:env(description([],['\n'|...]),[html('<dl class="latex">'),_624|...]) at /home/peter/src/swipl-devel/build.debug/home/library/ext/ltx2htm/latex2html.pl:935

but when I ran it by hand (calling main0/1), and did the debugger u command, I got more useful information:

   Exception: (1,887) tex:translate_env(description([], ['\n', \(classitem, [{'PlTerm'}]), '\n', 'Generic', 'Prolog', term|...]), file, file, _353630) ?

which helped me figure out where the bad markup was.

set_prolog_flag(debugger_write_options, [quoted(true), portray(true), max_depth(20), attributes(portray)]),
set_prolog_flag(answer_write_options, [quoted(true), portray(true), max_depth(200), attributes(portray)]),
print_message(error, Error),
halt(1)
)).

main0(Argv) :-
argv_options(Argv, Files, Options),
set_debugging(Options),
set_quiet(Options),
Expand Down