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[Bertrand BRATSCHI <address@hidden>]

Something strange happend on my computer ( TeXmacs-1.99.11 on Mac OS 10.14.6 ) :

When I try to type something like  «  x^(1/2)  »    in maths mode, using the exponent and the standard fraction, the TeXmacs session get stuck. ( and I have to interrupt it because that seems impossible to write anything more )

The picture below shows ( the source of ) the result at this moment.

Notice : It does not happen if I introduce the fraction first, and then put it in exponent.

Any explanation ?

Bertrand