Re: Segmentation Fault on Exported Resursively Expanded Variable

[Paul Smith]

On Mon, 2024-01-15 at 11:21 +0000, MIAOW Miao wrote:
> I found name of exported resursively expanded variable with $(shell
> ...) cannot be too long in gnu make version >= 4.4, otherwise a
> segmentation fault is triggled. I'm not sure if variable-name-too-
> long is a bug. However, make is
> supposed to tell me what's going wrong.
> 
> Here is a Makefile that can reproduce the segmentation fault:
> > THIS_LONG_VARIABLE_NAME_PREDUCE_THE_ERROR= $(shell echo hello)
> > exportTHIS_LONG_VARIABLE_NAME_PREDUCE_THE_ERROR
> > 
> > all: ; echo "abc"

I was not able to reproduce this problem, either with my own build of
GNU Make 4.4.1 or with a binary extracted from the RPM from the link
you provided.  I tried running under valgrind and with a binary
compiled with ASAN, with and withoug debugging enabled, ran the test
1000 times.  I also tried GNU Make 4.4.

If you can generate a coredump please examine it with GDB and send
along at least the backtrace.

-- 
Paul D. Smith <psmith@gnu.org>            Find some GNU make tips at:
https://www.gnu.org                       http://make.mad-scientist.net
"Please remain calm...I may be mad, but I am a professional." --Mad
Scientist