Constructing an array object in #lang racket crashes the macro stepper

[Rscho314]

As the title suggests, this crashes the macro stepper:

#lang racket
(require math/array)
(array #[5])

With error:

Internal error:
with-syntax1: failed pattern match against
(?first . ?rest)
in: ()

But using typed/racket works as expected:

#lang typed/racket
(require math/array)
(array #[5])

Error dump:
dump.txt

[samth]

This now works as of 7.6.