Blame SOURCES/bash-4.4-assignment-error.patch

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diff --git a/execute_cmd.h b/execute_cmd.h
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--- a/execute_cmd.h
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+++ b/execute_cmd.h
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@@ -37,6 +37,9 @@ struct func_array_state
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   };
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 #endif
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+/* Variables delared in execute_cmd.c, used by many other files */
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+extern int executing_command_builtin;
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+
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 extern struct fd_bitmap *new_fd_bitmap __P((int));
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 extern void dispose_fd_bitmap __P((struct fd_bitmap *));
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 extern void close_fd_bitmap __P((struct fd_bitmap *));
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diff --git a/subst.c b/subst.c
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--- a/subst.c
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+++ b/subst.c
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@@ -10676,11 +10676,12 @@ expand_word_list_internal (list, eflags)
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 		  tint = do_word_assignment (temp_list->word, 0);
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 		  this_command_name = savecmd;
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 		  /* Variable assignment errors in non-interactive shells
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-		     running in Posix.2 mode cause the shell to exit. */
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+		     running in Posix.2 mode cause the shell to exit, unless 
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+		     they are being run by the `command' builtin. */
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 		  if (tint == 0)
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 		    {
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 		      last_command_exit_value = EXECUTION_FAILURE;
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-		      if (interactive_shell == 0 && posixly_correct)
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+		      if (interactive_shell == 0 && posixly_correct && executing_command_builtin == 0)
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 			exp_jump_to_top_level (FORCE_EOF);
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 		      else
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 			exp_jump_to_top_level (DISCARD);