[perl #129366] Assertion `!(o->op_private &~PL_op_private_valid[type])' failed (Perl_op_free op.c:791)

# New Ticket Created by  Brian Carpenter 
# Please include the string:  [perl #129366]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=129366 >


Triggered with Perl v5.25.6 (v5.25.5-15-g2e2af85).

./perl -e 'sub{grep{()}0..0^-1'
Range iterator outside integer range at -e line 1.
perl: op.c:791: void Perl_op_free(OP *): Assertion `!(o->op_private & ~PL_op_private_valid[type])' failed.
Aborted

• [perl #129366] Assertion `!(o->op_private &~PL_op_private_valid[type])' failed (Perl_op_free op.c:791) by Brian Carpenter via RT
• [perl #129366] Assertion `!(o->op_private &~PL_op_private_valid[type])' failed (Perl_op_free op.c:791) by Dan Collins via RT
• [perl #129366] Assertion `!(o->op_private &~PL_op_private_valid[type])' failed (Perl_op_free op.c:791) by Brian Carpenter