Please help with the strangest problem I have come across.

The following document fails (does not complete, hangs) when the following conditions hold:

ConTeXt ver: 2015.09.01 11:10 MKIV beta fmt: 2015.9.3 int: english/english
\mainlanguage[en] or fr
Font EBGaramond otf from EBGaramond-0.016.zip https://bitbucket.org/georgd/eb-garamond/downloads
Font features clig and hlig
Font style \it or \sl
Text string (among others) astro istar istra ister istor istro istur

The problem is the same with \usemodule[newotf] and without.

The problem does not occur with:

ConTeXt ver: 2015.08.30 17:07 MKIV beta fmt: 2015.8.30 int: english/english.
\mainlanguage la or de.
\tf or \sc or \bd (there is no bold in the font).

The issue appears to be related to the st ligature, but only in conjunction with some other letters.

Can somebody else reproduce the problem. For the record, this is running on Windows 10 Pro 64-bit.

The problem document:

\definefontfeature [ff:ebg][default][
                                       clig=yes,hlig=yes, %% 1 %%
                                       ]
\definefontfamily [mainface][serif][ebgaramond]
                                      [features=ff:ebg]
\setupbodyfont     [mainface]
% \mainlanguage[la]                                        %% 2 %%
\mainlanguage[fr]                                        %% 3 %%
\starttext
\it                                                      %% 4 %%
% \tf                                                      %% 5 %%
astro                                                    %% 6 %%
% aStro                                                    %% 7 %%
% asTor                                                    %% 8 %%
\stoptext

--
Rik