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crash when invoking a method on a struct returned from a function

From: Bruno Haible
Subject: crash when invoking a method on a struct returned from a function
Date: Mon, 08 Jun 2020 01:16:36 +0200
User-agent: KMail/5.1.3 (Linux/4.4.0-179-generic; KDE/5.18.0; x86_64; ; )


With the attached gmo.pk, I can run

(poke) (gmo @ 0#B).get_translation_slow("foo")

To make things more handy, I defined a function

defun the_gmo = gmo :
  return gmo @ 0#B;

and expected the above expression to be equivalent to

But this does not work. How to reproduce:

$ poke
.load gmo.pk
.file de.mo
(gmo @ 0#B).get_translation_slow("foo")

The latter evalution crashes. Here's the stack trace:

#0  0x00007ffff6ecb428 in __GI_raise (sig=sig@entry=6) at 
#1  0x00007ffff6ecd02a in __GI_abort () at abort.c:89
#2  0x00007ffff6ec3bd7 in __assert_fail_base (fmt=<optimized out>, 
    assertion=assertion@entry=0x4c4bf0 "PVM_IS_SCT (sct) && PVM_IS_STR (name)", 
file=file@entry=0x4c4be0 "pvm-val.c", 
    line=line@entry=169, function=function@entry=0x4c4f20 
<__PRETTY_FUNCTION__.7355> "pvm_ref_struct") at assert.c:92
#3  0x00007ffff6ec3c82 in __GI___assert_fail (assertion=0x4c4bf0 "PVM_IS_SCT 
(sct) && PVM_IS_STR (name)", file=0x4c4be0 "pvm-val.c", 
    line=169, function=0x4c4f20 <__PRETTY_FUNCTION__.7355> "pvm_ref_struct") at 
#4  0x000000000046f218 in pvm_ref_struct (sct=16531366, name=13372006) at 
#5  0x000000000049e946 in pvm_execute_or_initialize (jitter_initialize=false, 
    jitter_original_state=0x6f9310) at ./pvm.jitter:3739
#6  0x0000000000482e09 in pvm_execute_executable_routine (er=0xa22d40, 
s=0x6f9310) at ./pvm.jitter:527
#7  0x000000000047c156 in pvm_execute_routine (r=0xa465e0, s=0x6f9310) at 
#8  0x000000000046e947 in pvm_run (apvm=0x6f9310, program=0xfc1e10, 
res=0x7fffffffd5a0) at pvm.c:125
#9  0x0000000000416b03 in pkl_execute_statement (compiler=0x701110, 
buffer=0xadd490 "the_gmo.get_translation_slow(\"foo\");", 
    end=0x7fffffffd5e0, val=0x7fffffffd5a0) at pkl.c:363
#10 0x00000000004147b9 in pk_compile_statement (pkc=0x6fcdc0, buffer=0xadd490 
    end=0x7fffffffd5e0, valp=0x7fffffffd5e8) at libpoke.c:102
#11 0x0000000000406c67 in pk_cmd_exec (str=0xa22d80 
"the_gmo.get_translation_slow(\"foo\")") at pk-cmd.c:618
#12 0x000000000040591d in pk_repl () at pk-repl.c:339
#13 0x0000000000404d07 in main (argc=1, argv=0x7fffffffd7f8) at poke.c:681

Attachment: gmo.pk
Description: application/tex-pk

Attachment: de.mo
Description: application/gettext-translation

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