Segmentation fault (core dumped)

[TheDevick]

Following exactly like documentation, it's giving the error: Segmentation fault (core dumped)

~/Coding/Playground 
❯ sudo apt install tcl tk
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
tcl is already the newest version (8.6.11+1build2).
tk is already the newest version (8.6.11+1build2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

~/Coding/Playground 
❯ php --ri ffi

FFI

FFI support => enabled

Directive => Local Value => Master Value
ffi.enable => preload => preload
ffi.preload => no value => no value

~/Coding/Playground 
❯ git clone https://github.com/skoro/php-tkui.git php-tkui
Cloning into 'php-tkui'...
remote: Enumerating objects: 4826, done.
remote: Counting objects: 100% (1010/1010), done.
remote: Compressing objects: 100% (384/384), done.
remote: Total 4826 (delta 672), reused 920 (delta 624), pack-reused 3816
Receiving objects: 100% (4826/4826), 6.65 MiB | 6.78 MiB/s, done.
Resolving deltas: 100% (3493/3493), done.

~/Coding/Playground took 2s 
❯ cd php-tkui

php-tkui on  master via 🐘 v8.3.8 
❯ composer install
Installing dependencies from lock file (including require-dev)
Verifying lock file contents can be installed on current platform.
Package operations: 44 installs, 0 updates, 0 removals
  - Installing psr/log (1.1.4): Extracting archive
  - Installing monolog/monolog (2.9.2): Extracting archive
  - Installing phpstan/phpdoc-parser (1.26.0): Extracting archive
  - Installing phpdocumentor/reflection-common (2.2.0): Extracting archive
  - Installing doctrine/deprecations (1.1.3): Extracting archive
  - Installing phpdocumentor/type-resolver (1.8.2): Extracting archive
  - Installing sebastian/recursion-context (4.0.5): Extracting archive
  - Installing sebastian/exporter (4.0.6): Extracting archive
  - Installing sebastian/diff (4.0.6): Extracting archive
  - Installing sebastian/comparator (4.0.8): Extracting archive
  - Installing symfony/polyfill-ctype (v1.29.0): Extracting archive
  - Installing webmozart/assert (1.11.0): Extracting archive
  - Installing phpdocumentor/reflection-docblock (5.3.0): Extracting archive
  - Installing doctrine/instantiator (2.0.0): Extracting archive
  - Installing phpspec/prophecy (v1.19.0): Extracting archive
  - Installing phpstan/phpstan (1.10.62): Extracting archive
  - Installing sebastian/version (3.0.2): Extracting archive
  - Installing sebastian/type (3.2.1): Extracting archive
  - Installing sebastian/resource-operations (3.0.4): Extracting archive
  - Installing sebastian/object-reflector (2.0.4): Extracting archive
  - Installing sebastian/object-enumerator (4.0.4): Extracting archive
  - Installing sebastian/global-state (5.0.7): Extracting archive
  - Installing sebastian/environment (5.1.5): Extracting archive
  - Installing sebastian/code-unit (1.0.8): Extracting archive
  - Installing sebastian/cli-parser (1.0.2): Extracting archive
  - Installing phpunit/php-timer (5.0.3): Extracting archive
  - Installing phpunit/php-text-template (2.0.4): Extracting archive
  - Installing phpunit/php-invoker (3.1.1): Extracting archive
  - Installing phpunit/php-file-iterator (3.0.6): Extracting archive
  - Installing theseer/tokenizer (1.2.3): Extracting archive
  - Installing nikic/php-parser (v5.0.2): Extracting archive
  - Installing sebastian/lines-of-code (1.0.4): Extracting archive
  - Installing sebastian/complexity (2.0.3): Extracting archive
  - Installing sebastian/code-unit-reverse-lookup (2.0.3): Extracting archive
  - Installing phpunit/php-code-coverage (9.2.31): Extracting archive
  - Installing phar-io/version (3.2.1): Extracting archive
  - Installing phar-io/manifest (2.0.4): Extracting archive
  - Installing myclabs/deep-copy (1.11.1): Extracting archive
  - Installing symfony/polyfill-mbstring (v1.29.0): Extracting archive
  - Installing phpunit/phpunit (9.6.17): Extracting archive
  - Installing symfony/polyfill-php80 (v1.29.0): Extracting archive
  - Installing phpoption/phpoption (1.9.2): Extracting archive
  - Installing graham-campbell/result-type (v1.1.2): Extracting archive
  - Installing vlucas/phpdotenv (v5.6.0): Extracting archive
Generating autoload files
34 packages you are using are looking for funding.
Use the `composer fund` command to find out more!

php-tkui on  master via 🐘 v8.3.8 
❯ php demos/buttons.php
Segmentation fault (core dumped)

[skoro]

Could you please run with debug output ?

DEBUG=true php demos/buttons.php