Bug#944780: Info received (Many more cases where this fails - proposed patch included)

[Tim Woodall]

This bug is still present in bookworm. Attached updated patch.

diff -urN bash-5.2.15.orig/execute_cmd.c bash-5.2.15/execute_cmd.c
--- bash-5.2.15.orig/execute_cmd.c	2022-12-13 17:09:02.000000000 +0000
+++ bash-5.2.15/execute_cmd.c	2022-12-13 17:09:02.000000000 +0000
@@ -5633,7 +5633,12 @@
       /* If we're optimizing out the fork (implicit `exec'), decrement the
 	 shell level like `exec' would do. Don't do this if we are already
 	 in a pipeline environment, assuming it's already been done. */
-      if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE && (subshell_environment & SUBSHELL_PIPE) == 0)
+      if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE &&
+	   (subshell_environment & SUBSHELL_ASYNC) == 0 &&
+	   (subshell_environment & SUBSHELL_PAREN) == 0 &&
+	   (subshell_environment & SUBSHELL_COMSUB) == 0 &&
+	   (subshell_environment & SUBSHELL_PIPE) == 0 &&
+	   (subshell_environment & SUBSHELL_COPROC) == 0)
 	adjust_shell_level (-1);
 
       maybe_make_export_env ();