This is XeTeX, Version 3.141592653-2.6-0.999995 (TeX Live 2023 Gentoo Linux) (INITEX)  29 MAR 2024 12:55
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**xelatex.ini
(/usr/share/texmf-dist/tex/latex/tex-ini-files/xelatex.ini
(/usr/share/texmf-dist/tex/latex-dev/base/latex.ltx
(/usr/share/texmf-dist/tex/latex-dev/base/texsys.cfg)
\openout15 = `texsys.aux'.


./texsys.aux found


\@currdir set to: ./.


Assuming \openin and \input 
have the same search path.


Defining UNIX/DOS style filename parser.

catcodes, registers,
\maxdimen=\dimen10
\hideskip=\skip10
\p@=\dimen11
\z@=\dimen12
\z@skip=\skip11
\voidb@x=\box10
 parameters,
\normalbaselineskip=\skip12
\normallineskip=\skip13
\normallineskiplimit=\dimen13
\interfootnotelinepenalty=\count23
\strutbox=\box11

LaTeX2e <2021-05-01> pre-release-2 (develop 2024-3-29 branch)
(/usr/share/texmf-dist/tex/latex/l3kernel/expl3.ltx
(/usr/share/texmf-dist/tex/latex/l3kernel/expl3-code.tex
Package: expl3 2024-01-22 L3 programming layer (code)
\c_max_int=\count24
\l_tmpa_int=\count25
\l_tmpb_int=\count26
\g_tmpa_int=\count27
\g_tmpb_int=\count28
\l__seq_internal_a_int=\count29
\l__seq_internal_b_int=\count30
\g__kernel_prg_map_int=\count31
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\l__iow_indent_int=\count37
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\l_tmpb_dim=\dimen17
\g_tmpa_dim=\dimen18
\g_tmpb_dim=\dimen19
\c_zero_skip=\skip14
\c_max_skip=\skip15
\l_tmpa_skip=\skip16
\l_tmpb_skip=\skip17
\g_tmpa_skip=\skip18
\g_tmpb_skip=\skip19
\c_zero_muskip=\muskip10
\c_max_muskip=\muskip11
\l_tmpa_muskip=\muskip12
\l_tmpb_muskip=\muskip13
\g_tmpa_muskip=\muskip14
\g_tmpb_muskip=\muskip15
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\c__fp_big_leading_shift_int=\count44
\c__fp_big_middle_shift_int=\count45
\c__fp_big_trailing_shift_int=\count46
\c__fp_Bigg_leading_shift_int=\count47
\c__fp_Bigg_middle_shift_int=\count48
\c__fp_Bigg_trailing_shift_int=\count49
\l__fp_function_arg_int=\count50
\g__fp_array_int=\count51
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\c__regex_cs_mode_int=\count79
\l__regex_catcodes_int=\count80
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\c__regex_catcode_L_int=\count82
\c__regex_catcode_O_int=\count83
\c__regex_catcode_A_int=\count84
\c__regex_all_catcodes_int=\count85
\l__regex_show_lines_int=\count86
\l__regex_min_state_int=\count87
\l__regex_max_state_int=\count88
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\l__regex_max_pos_int=\count95
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\l__regex_success_pos_int=\count98
\l__regex_curr_char_int=\count99
\l__regex_curr_catcode_int=\count100
\l__regex_last_char_int=\count101
\l__regex_last_char_success_int=\count102
\l__regex_case_changed_char_int=\count103
\l__regex_curr_state_int=\count104
\l__regex_step_int=\count105
\l__regex_min_thread_int=\count106
\l__regex_max_thread_int=\count107
\l__regex_replacement_csnames_int=\count108
\l__regex_match_count_int=\count109
\l__regex_min_submatch_int=\count110
\l__regex_submatch_int=\count111
\l__regex_zeroth_submatch_int=\count112
\l__regex_added_begin_int=\count113
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\g__regex_trace_regex_int=\count115
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\l__color_internal_int=\count116
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\l__coffin_internal_box=\box18
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\l__coffin_offset_x_dim=\dimen30
\l__coffin_offset_y_dim=\dimen31
\l__coffin_x_dim=\dimen32
\l__coffin_y_dim=\dimen33
\l__coffin_x_prime_dim=\dimen34
\l__coffin_y_prime_dim=\dimen35
\c_empty_coffin=\box19
\l__coffin_aligned_coffin=\box20
\l__coffin_aligned_internal_coffin=\box21
\l_tmpa_coffin=\box22
\l_tmpb_coffin=\box23
\g_tmpa_coffin=\box24
\g_tmpb_coffin=\box25
\l__coffin_bounding_shift_dim=\dimen36
\l__coffin_left_corner_dim=\dimen37
\l__coffin_right_corner_dim=\dimen38
\l__coffin_bottom_corner_dim=\dimen39
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\l__coffin_scaled_width_dim=\dimen42
\c__coffin_empty_coffin=\box26
\l__coffin_display_coffin=\box27
\l__coffin_display_coord_coffin=\box28
\l__coffin_display_pole_coffin=\box29
\l__coffin_display_offset_dim=\dimen43
\l__coffin_display_x_dim=\dimen44
\l__coffin_display_y_dim=\dimen45
\g__codepoint_data_ior=\read0
)) hacks,
document commands,
\l__cmd_current_arg_int=\count118
\g__cmd_grabber_int=\count119
\l__cmd_m_args_int=\count120
\l__cmd_v_nesting_int=\count121
\l__hook_labels_int=\count122

! Undefined control sequence.
<argument> ... \NewHook }}\__kernel_msg_info:nnxx 
                                                  {ltcmd}{define-command}{\t...
l.4888 ...ok             { m }{ \hook_new:n {#1} }
                                                  
? 
! Emergency stop.
<argument> ... \NewHook }}\__kernel_msg_info:nnxx 
                                                  {ltcmd}{define-command}{\t...
l.4888 ...ok             { m }{ \hook_new:n {#1} }
                                                  
End of file on the terminal!

No pages of output.
# actual command line used during this run
# xetex -ini   -jobname=xelatex-dev -progname=xelatex-dev -etex xelatex.ini </dev/null