On 6/30/2022 11:16 AM, Max Chernoff via ntg-context wrote:

Sometimes using \setextrafontkerns can cause an infinite loop.

Example 1:

    \setextrafontkerns[max]

    \starttext         l\it l     \stoptext

Example 2:

    \setupbodyfont[libertinus]

    \setextrafontkerns[max]

    \starttext         x\ss x     \stoptext

Both of these examples cause ConTeXt to get stuck until it runs out of memory. This happens in both MkIV and MkXL.

This patch seems to fix the issue (although it may break other things...):

--- texmf-context/tex/context/base/mkiv/typo-fkr.old    2022-06-30 03:05:17.702804200 -0600 +++ texmf-context/tex/context/base/mkiv/typo-fkr.lua    2022-06-30 03:05:22.286858200 -0600 @@ -57,6 +57,7 @@                          end                          if kern ~= 0 then                              head, current = insertbefore(head,current,new_kern(kern)) +                            current = getnext(current)                          end                          lastdata = data                      else @@ -69,6 +70,7 @@                      local kern = getkernpair(lastdata,lastchar,char)                      if kern ~= 0 then                          head, current = insertbefore(head,current,new_kern(kern)) +                        current = getnext(current)                      end                  end                  lastchar = char just

head = insertbefore(head,current,new_kern(kern)) will do ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------