Fix: segmentation fault during GC marking

ashinn / chibi-scheme

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Fix: segmentation fault during GC marking #954

Closed petteripiiroinen closed 2 months ago

petteripiiroinen commented 2 months ago

The stack top needs to be initialised before a potential garbage collection after SEXP_OP_APPLY1 and SEXP_OP_TAIL_CALL, since stack top can otherwise be pointing to a stale pointer.

This fixes the #953