Will Robertson

Oh no... this is PROBABLY a bug in breqn revealed by a recent change in babel. I seem to have a fix and will upload shortly.

Can you provide an example please? Hopefully a short document I can compile myself. Sorry, can’t promise a quick fix.

I imagine this code pre-dates LuaTeX but I could be wrong… perhaps just a regular bug :) Thanks for logging this here, hopefully one of us gets a chance to...

Using \tracingall shows an infinite loop: \mg@OML ->1 {the character ;} ;->\tikz@nonactivesemicolon \tikz@nonactivesemicolon ->; {the character ;} ;->\tikz@nonactivesemicolon \tikz@nonactivesemicolon ->; {the character ;} ... I'm not too sure whether this...

Thanks. Is this error particular to this equation? (I.e., do you use layout=L for other equations without trouble?)

BTW when you see > ! Undefined control sequence. > \eq@measure ...al \eq@failout \endgroup \EQ@trial this means that \EQ@trial only is undefined. So you could describe this simply as "Undefined...

I turned on debugging mode and breqn claims it can’t find a satisfactory solution using layout=L. My question here would be: if a specific layout is requested but not possible,...

This is more easily seen with enlarged `framesep` values.

Thanks for the example. Your report hasn’t gone unnoticed, but I’m afraid I have very little time at present to look at the internals of breqn… the reason for the...

@FrankMittelbach — Sorry, I did look at this briefly over summer but didn't have proper time to sort out a fix. With #32 when you say "back up" over a...