[ruby-core:106022] [Ruby master Feature#18280] Allow rb_utf8_str_new_cstr(NULL)

Issue #18280 has been updated by shyouhei (Shyouhei Urabe).


Fix merged ATM to delete the attribute, for the sake of compatibility.

What to do with those other functions shall be discussed though.

----------------------------------------
Feature #18280: Allow rb_utf8_str_new_cstr(NULL)
https://bugs.ruby-lang.org/issues/18280#change-94608

* Author: ukolovda (Dmitry Ukolov)
* Status: Feedback
* Priority: Normal
----------------------------------------
Ruby process crushed.

`
Addressable::URI when parsed from 'http://example.com/%E8'
/home/ukolovda/RubymineProjects/external/addressable/lib/addressable/idna/native.rb:34: [BUG] Segmentation fault at 0x0000000000000000
ruby 3.1.0dev (2021-10-31T09:27:55Z master 13a9597c7c) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0043 p:---- s:0231 e:000230 CFUNC  :nfkc_normalize
c:0042 p:0019 s:0226 e:000225 METHOD /home/ukolovda/RubymineProjects/external/addressable/lib/addressable/idna/native.rb:34
c:0041 p:0323 s:0221 e:000219 METHOD /home/ukolovda/RubymineProjects/external/addressable/lib/addressable/uri.rb:583
c:0040 p:0038 s:0210 e:000209 BLOCK  /home/ukolovda/RubymineProjects/external/addressable/lib/addressable/uri.rb:1559 [FINISH]
...

-- Machine register context ------------------------------------------------
 RIP: 0x00007feea7aa9f35 RBP: 0x0000000000000000 RSP: 0x00007ffc0e4ffdf8
 RAX: 0x0000000000000000 RBX: 0x0000000055550083 RCX: 0x0000000000000000
 RDX: 0x0000000000000000 RDI: 0x0000000000000000 RSI: 0x0000000004f72d81
  R8: 0x0000000004f72d83  R9: 0x00007fee95642a68 R10: 0x0000000000000001
 R11: 0x0000000000000000 R12: 0x00007fee96663dc0 R13: 0x0000000000000001
 R14: 0x00007fee9a414590 R15: 0x0000000002ce4b20 EFL: 0x0000000000010283

-- C level backtrace information -------------------------------------------
/home/ukolovda/.rvm/rubies/ruby-head/lib/libruby.so.3.1(rb_print_backtrace+0x11) [0x7feea80838d5] vm_dump.c:759
/home/ukolovda/.rvm/rubies/ruby-head/lib/libruby.so.3.1(rb_vm_bugreport) vm_dump.c:1045
/home/ukolovda/.rvm/rubies/ruby-head/lib/libruby.so.3.1(rb_bug_for_fatal_signal+0xf0) [0x7feea7e88cb0] error.c:820
/home/ukolovda/.rvm/rubies/ruby-head/lib/libruby.so.3.1(sigsegv+0x49) [0x7feea7fd99b9] signal.c:964
/lib64/libpthread.so.0(__restore_rt+0x0) [0x7feea7d601b0]
/lib64/libc.so.6(__strlen_avx2+0x15) [0x7feea7aa9f35]
/home/ukolovda/.rvm/rubies/ruby-head/lib/libruby.so.3.1(rb_str_new_cstr+0x9) [0x7feea7ff4999] string.c:958
/home/ukolovda/.rvm/rubies/ruby-head/lib/libruby.so.3.1(rb_utf8_str_new_cstr+0x7) [0x7feea7ff49f7] string.c:972
/home/ukolovda/.rvm/gems/ruby-head/gems/idn-ruby-0.1.2/lib/idn.so(nfkc_normalize+0x4d) [0x7fee96668a5d] stringprep.c:159
/home/ukolovda/.rvm/rubies/ruby-head/lib/libruby.so.3.1(vm_cfp_consistent_p+0x0) [0x7feea80636a4] vm_insnhelper.c:3025
/home/ukolovda/.rvm/rubies/ruby-head/lib/libruby.so.3.1(vm_call_cfunc_with_frame) vm_insnhelper.c:3027
/home/ukolovda/.rvm/rubies/ruby-head/lib/libruby.so.3.1(vm_sendish+0x4e) [0x7feea80688e9] vm_insnhelper.c:4651
...

`

Lalest ruby version (`rvm install ruby-head`)


In previous version it give exception:
`ArgumentError: NULL pointer given`




-- 
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