Re: [Dev-luatex] segfault on example in manual

On 2019-04-02 at 08:50:23 +0200, luigi scarso wrote:

On Tue, Apr 2, 2019 at 7:18 AM luigi scarso wrote:

On Tue, Apr 2, 2019 at 12:23 AM Reinhard Kotucha < reinhard.kotucha@web.de> wrote:

Hi, when I run the example on page 261/262 of the LuaTeX Manual and the input file ("foo.pdf" in the example) doesn't exist, I get

  Segmentation fault (core dumped)

on x86_64-linux.

  This is ok $ luatex --fmt=luatex-plain  "test-plain.tex"

Hi Luigi, this works here too. I get: This is LuaTeX, Version 1.10.0 (TeX Live 2019) restricted system commands enabled. (./testpdfscanner.tex warning (pdfe lib): no valid pdf file 'foo.pdf' ) (see the transcript file for additional information) warning (pdf backend): no pages of output. Transcript written on testpdfscanner.log. I suppose that texlua crashes when trying to print the warning, see gdb output below. What I don't understand is is why luatex and texlua behave differently here. Regards, Reinhard Core was generated by `./texlua ./testpdfscanner.lua'. Program terminated with signal 11, Segmentation fault. #0 0x00000000004c31e8 in tprint (sss=sss@entry=0x722ca6 "warning ") at ../../../texk/web2c/luatexdir/tex/printing.c:419 419 int newlinechar = new_line_char_par; (gdb) bt #0 0x00000000004c31e8 in tprint (sss=sss@entry=0x722ca6 "warning ") at ../../../texk/web2c/luatexdir/tex/printing.c:419 #1 0x0000000000490d37 in normal_warning (t=t@entry=0x7361e6 "pdfe lib", p=p@entry=0xc3b5c0 "no valid pdf file 'foo.pdf'") at ../../../texk/web2c/luatexdir/tex/errors.c:992 #2 0x0000000000490f15 in formatted_warning (t=t@entry=0x7361e6 "pdfe lib", fmt=fmt@entry=0x7361ef "no valid pdf file '%s'") at ../../../texk/web2c/luatexdir/tex/errors.c:1031 #3 0x0000000000525904 in pdfelib_open (L=0x1d97048) at ../../../texk/web2c/luatexdir/lua/lpdfelib.c:836 #4 0x0000000000642911 in luaD_precall (L=L@entry=0x1d97048, func=func@entry=0x1e61b10, nresults=nresults@entry=1) at ../../../libs/lua53/lua53-src/src/ldo.c:434 #5 0x000000000065586d in luaV_execute (L=L@entry=0x1d97048) at ../../../libs/lua53/lua53-src/src/lvm.c:1134 #6 0x0000000000642bdf in luaD_call (L=L@entry=0x1d97048, func=<optimized out>, nResults=<optimized out>) at ../../../libs/lua53/lua53-src/src/ldo.c:499 #7 0x0000000000642c31 in luaD_callnoyield (L=0x1d97048, func=<optimized out>, nResults=<optimized out>) at ../../../libs/lua53/lua53-src/src/ldo.c:509 #8 0x000000000064207c in luaD_rawrunprotected (L=L@entry=0x1d97048, f=f@entry=0x63a690 , ud=ud@entry=0x7ffcb9c7fbc0) at ../../../libs/lua53/lua53-src/src/ldo.c:142 #9 0x0000000000642efd in luaD_pcall (L=L@entry=0x1d97048, func=func@entry=0x63a690 , u=u@entry=0x7ffcb9c7fbc0, old_top=720, ef=<optimized out>) at ../../../libs/lua53/lua53-src/src/ldo.c:729 #10 0x000000000063bb2c in lua_pcallk (L=0x1d97048, nargs=nargs@entry=0, nresults=nresults@entry=0, errfunc=errfunc@entry=0, ctx=ctx@entry=0, k=k@entry=0x0) at ../../../libs/lua53/lua53-src/src/lapi.c:969 #11 0x000000000047bb29 in lua_initialize (ac=<optimized out>, av=<optimized out>) at ../../../texk/web2c/luatexdir/lua/luainit.c:1046 #12 0x0000000000445a09 in main (ac=<optimized out>, av=<optimized out>) at ../../../texk/web2c/luatexdir/luatex.c:588 (gdb) quit -- ------------------------------------------------------------------ Reinhard Kotucha Phone: +49-511-3373112 Marschnerstr. 25 D-30167 Hannover mailto:reinhard.kotucha@web.de ------------------------------------------------------------------