Re: Defining and exporting and a variable undefined in a foreach loop cause a Segmentation fault with Make 4.2.1 on Debian bullseye/sid x64

[Xavier Sanchez]

I've built Make 4.3 and the attached Makefile works as intended.

The exact same Makefile produce the segfault on 4.2.1 on my x64 machine with
glibc 2.29-10.

What is your libc version ?

$ /usr/local/bin/make -v
GNU Make 4.3
Built for x86_64-pc-linux-gnu
Copyright (C) 1988-2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

$ /usr/local/bin/make  
build/a
build/b

$ make -v
GNU Make 4.2.1
Built for x86_64-pc-linux-gnu
Copyright (C) 1988-2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

$ make -d

[...]

Updating goal targets....
Considering target file 'all'.
 File 'all' does not exist.
  Considering target file 'build/a'.
   File 'build/a' does not exist.
   Finished prerequisites of target file 'build/a'.
  Must remake target 'build/a'.
Segmentation fault

On 3/8/20 2:51 AM, Dmitry Goncharov wrote:
> On Thu, Mar 5, 2020 at 10:45 AM Xavier Sanchez <address@hidden> wrote:
>> Hi, I've got a segfault in __strlen_avx2 () at
>> ../sysdeps/x86_64/multiarch/strlen-avx2.S:65
>>
>> While defining a variable that has been undefined in a foreach loop using 
>> Make
>> 4.2.1 on my Bullseye/sid workstation.
> Does not reproduce for me with make-4.2.1 or make-4.3.90.
> Can you try make-4.3?
>
> regards, Dmitry

-- 
Xavier