internal error: no box to accumulate definition-context scopes

[AlexKnauth]

When I call syntax-local-make-definition-context within a module's begin-for-syntax, and then I require that module, I get an internal error from the macro expander.

Here's a minimal example of what gets the internal error:

#lang racket

(module A racket
  (begin-for-syntax
    (syntax-local-make-definition-context)))

(require 'A)

. internal error: no box to accumulate definition-context scopes

I'm on Racket version 6.90.0.28.

The error seems to be coming from "expand/definition-context.rkt" line 58, if that helps.

racket/racket/src/expander/expand/definition-context.rkt

Line 58 in 3531cb2

(unless def-ctx-scopes (error "internal error: no box to accumulate definition-context scopes"))

[lexi-lambda]

Wow, I just ran into a very similar issue and was about to report it when I saw you had already opened this issue. In my case, I was trying to use syntax-local-make-definition-context on the RHS of a let-syntaxes binding, which produces the same error:

#lang racket
(let-syntax ([x (syntax-local-make-definition-context)])
  (void))

I’m not sure if this is the same bug or a different one, but it seems plausible it’s related.