enumerator.c: Add a debug assertion #13571
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I'm tracking down a generic ivar corruption bug, and one possible explanation is that aseq sometimes becomes too_complex. This assertion is to attempt to confirm it. ``` ruby(sigsegv+0x54) [signal.c:934 ruby(rb_float_noflonum_value+0x0) internal/numeric.h:238 ruby(rb_float_value_inline) internal/numeric.h:241 ruby(flo_to_i) numeric.c:2654 ruby(vm_call0_cfunc_with_frame+0x7c) [0xaaac4f141a74] vm_eval.c:164 ruby(vm_call0_cfunc) vm_eval.c:178 ruby(vm_call0_body) vm_eval.c:229 ruby(vm_call0_cc+0xc8) vm_eval.c:101 ruby(rb_vm_call0+0x3c) vm_eval.c:61 ruby(rb_vm_call_kw) vm_eval.c:326 ruby(rb_check_funcall_default_kw) vm_eval.c:712 ruby(convert_type_with_id+0x8) object.c:3170 ruby(rb_to_integer_with_id_exception) object.c:3285 ruby(rb_to_int) object.c:3315 ruby(rb_num2long+0x68) numeric.c:3218 ruby(rb_num2long_inline+0x8) include/ruby/internal/arithmetic/long.h:272 ruby(rb_arithmetic_sequence_beg_len_step) enumerator.c:3865 ruby(rb_ary_aref1+0x24) array.c:1924 ruby(rb_ary_aref1) array.c:1915 ruby(rb_ary_aref) array.c:1900 ```
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I'm tracking down a generic ivar corruption bug, and one possible explanation is that aseq sometimes becomes too_complex. This assertion is to attempt to confirm it.