Need to prevent zpty feature detection from HUPing existing zptys

spec/integrations/client_zpty_spec.rb

@@ -1,11 +1,10 @@
 describe 'a running zpty command' do
+  let(:before_sourcing) { -> { session.run_command('zmodload zsh/zpty && zpty -b kitty cat') } }
+
   it 'is not affected by running zsh-autosuggestions' do
-    session.run_command('zmodload zsh/zpty')
-    session.run_command('zpty -b kitty cat')
-    session.run_command('zpty -w kitty cat')
-    sleep 1
-    session.run_command('zpty -r kitty')
+    sleep 1 # Give a little time for precmd hooks to run
+    session.run_command('zpty -t kitty; echo $?')
 
-    wait_for(session.content).to end_with("\ncat")
+    wait_for(session.content).to end_with("\n0")
   end
 end

src/features.zsh

@@ -7,7 +7,7 @@ _zsh_autosuggest_feature_detect() {
 	typeset -g _ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD
 	typeset -h REPLY
 
-	zpty $ZSH_AUTOSUGGEST_ASYNC_PTY_NAME :
+	zpty $ZSH_AUTOSUGGEST_ASYNC_PTY_NAME '{ zshexit() { kill -KILL $$; sleep 1 } }'
 
 	if (( REPLY )); then
 		_ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD=1

zsh-autosuggestions.zsh

@@ -122,7 +122,7 @@ _zsh_autosuggest_feature_detect() {
 	typeset -g _ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD
 	typeset -h REPLY
 
-	zpty $ZSH_AUTOSUGGEST_ASYNC_PTY_NAME :
+	zpty $ZSH_AUTOSUGGEST_ASYNC_PTY_NAME '{ zshexit() { kill -KILL $$; sleep 1 } }'
 
 	if (( REPLY )); then
 		_ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD=1