···<date: 2014-04-03, Thursday>···<from: Hans Hagen>···
> On 4/3/2014 6:29 PM, Dohyun Kim wrote: > > This is a bug report based on the issue discussed at > > https://github.com/lualatex/luaotfload/issues/212 > > > > \font\tenrm{file:lmroman10-regular.otf:mode=node;script=latn}\tenrm > > \setbox0\vbox{% > > x\penalty-10000 > > $a$x$a$ > > } > > \unvbox0 > > \setbox0\lastbox > > \unhbox0 > > \end > > > > The plain tex code shown above fails with a lua error: > > luatex-fonts-merged.lua:9616: attempt to index local 'current' (a nil value) > > > > My guess is: as math-on (math-off too) is a "discardable" item after a > > linebreak, the first math-on node has gone away. So the > > math-on/math-off pair has become broken, by which the behavior of > > "node.end_of_math" is confused. > > mtxrun --script plain test.tex > > runs ok here so i need an example that fails with context or luatex-plain It fails with the luatex-plain format from the minimals as of yesterday and Luatex 4972: error: .../context/tex/texmf-context/tex/context/base/font-ota.lua:144: attempt to index local 'current' (a nil value) . \bye ^^@-\par \vfill \supereject \end l.17 \bye Though the issue arises only in node mode. > normally the font callback is called on a hlist and there are always > paired math nodes > > (what is line 9616 in the current beta?) Line 9626 with yesterday’s code. Attached are patches for font-ota.lua and luatex-fonts-otn.lua that guard all invocations of end_of_math() with checks for the subtype. Best, Philipp
--- luatex-fonts-otn.lua.orig 2014-04-05 15:02:34.711828352 +0200
+++ luatex-fonts-otn.lua 2014-04-05 15:02:36.955171990 +0200
@@ -2375,7 +2375,7 @@
end
end
start = start.next
- elseif id == math_code then
+ elseif id == math_code and start.subtype == 0 then
start = end_of_math(start).next
else
start = start.next
@@ -2567,7 +2567,7 @@
end
end
start = start.next
- elseif id == math_code then
+ elseif id == math_code and start.subtype == 0 then
start = end_of_math(start).next
else
start = start.next
--- font-ota.lua.orig 2014-04-05 14:55:53.789969704 +0200
+++ font-ota.lua 2014-04-05 14:59:32.487654509 +0200
@@ -137,7 +137,7 @@
last[a_state] = s_fina
end
first, last, n = nil, nil, 0
- if id == math_code then
+ if id == math_code and current.subtype == 0 then
current = end_of_math(current)
end
end
@@ -423,7 +423,7 @@
if first or last then
first, last = finish(first,last)
end
- if id == math_code then
+ if id == math_code and current.subtype == 0 then
current = end_of_math(current)
end
end
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