Description:
------------
the set_error_handler will coredump in NTS DEBUG MODE 


the stack


__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007ffff5d45801 in __GI_abort () at abort.c:79
#2  0x00007ffff5d3539a in __assert_fail_base (fmt=0x7ffff5ebc7d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", 
    assertion=assertion@entry=0x5555563ed9f0 "(zend_gc_refcount(&(ht)->gc) == 1) || ((ht)->u.flags & (1<<6))", file=file@entry=0x5555563ed960 "/root/php-src/Zend/zend_hash.c", 
    line=line@entry=965, function=function@entry=0x5555563edee0 <__PRETTY_FUNCTION__.13579> "_zend_hash_index_add_or_update_i") at assert.c:92
#3  0x00007ffff5d35412 in __GI___assert_fail (assertion=0x5555563ed9f0 "(zend_gc_refcount(&(ht)->gc) == 1) || ((ht)->u.flags & (1<<6))", file=0x5555563ed960 "/root/php-src/Zend/zend_hash.c", 
    line=965, function=0x5555563edee0 <__PRETTY_FUNCTION__.13579> "_zend_hash_index_add_or_update_i") at assert.c:101
#4  0x0000555555ba2bdb in _zend_hash_index_add_or_update_i (ht=0x7fffee6593c0, h=0, pData=0x555556978ac0 <executor_globals>, flag=18) at /root/php-src/Zend/zend_hash.c:965
#5  0x0000555555ba3170 in zend_hash_next_index_insert (ht=0x7fffee6593c0, pData=0x555556978ac0 <executor_globals>) at /root/php-src/Zend/zend_hash.c:1078
#6  0x0000555555c5dcba in ZEND_ASSIGN_DIM_SPEC_CV_UNUSED_OP_DATA_CV_HANDLER () at /root/php-src/Zend/zend_vm_execute.h:46211
#7  0x0000555555c69ebf in execute_ex (ex=0x7fffee614020) at /root/php-src/Zend/zend_vm_execute.h:57578
#8  0x0000555555c6a466 in zend_execute (op_array=0x7fffee682300, return_value=0x0) at /root/php-src/Zend/zend_vm_execute.h:57922
#9  0x0000555555b8d2b4 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /root/php-src/Zend/zend.c:1666
#10 0x0000555555aee5b4 in php_execute_script (primary_file=0x7fffffffd0f0) at /root/php-src/main/main.c:2617
#11 0x0000555555c6d070 in do_cli (argc=2, argv=0x55555697d570) at /root/php-src/sapi/cli/php_cli.c:961
#12 0x0000555555c6e232 in main (argc=2, argv=0x55555697d570) at /root/php-src/sapi/cli/php_cli.c:1356



it may relate the commit of 
https://github.com/php/php-src/commit/a588b825d6f243935911e58591d4072ca5bcbcfb#diff-3054389ad750ce9a9f5895cd6d27800fR2222

and 






Test script:
---------------
<?php
set_error_handler(function(){
        throw new \Exception();
});
function test(){
        $a[] = $b;
}
try{
                test();
}catch(\Exception $e){
                echo "catch";
}

Expected result:
----------------
it will catch and  print "catch"

Actual result:
--------------
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.