bug#16711: 24.3.50; Error: pre-redisplay-function

[Stefan Monnier]

> I've been bitten by this intermitently for the last few weeks; it
> appears to be happening more often now.
> Observed initially in W3 when rendering heavy-weight web pages; it also
> shows up in eww.

That's a problem that needs fixing.

> You get a variable depth exeeds max eval depth error repeatedly --
> turning on debug doesn't yield any additional info.

That's not very surprising: since pre-redisplay-function is run during
redisplay, running redisplay (e.g. to show a backtrace) from within it
would require extra care to try and avoid inf-looping.

Maybe we should re-introduce stack-trace-on-error, or something
equivalent, for those cases.

In the mean time, can you run Emacs within GDB and set a breakpoint on
maybe_call_debugger?


        Stefan