Added rb_syserr_new_path

Similar to rb_syserr_fail_path, but just returns the created
exception instance instead of raising it.

error.c

@@ -2829,6 +2829,12 @@ rb_sys_fail_path_in(const char *func_name, VALUE path)
 
 void
 rb_syserr_fail_path_in(const char *func_name, int n, VALUE path)
+{
+    rb_exc_raise(rb_syserr_new_path_in(func_name, n, path));
+}
+
+VALUE
+rb_syserr_new_path_in(const char *func_name, int n, VALUE path)
 {
     VALUE args[2];
 
@@ -2841,7 +2847,7 @@ rb_syserr_fail_path_in(const char *func_name, int n, VALUE path)
     }
     args[0] = path;
     args[1] = rb_str_new_cstr(func_name);
-    rb_exc_raise(rb_class_new_instance(2, args, get_syserr(n)));
+    return rb_class_new_instance(2, args, get_syserr(n));
 }
 #endif
 

internal/error.h

@@ -32,9 +32,11 @@
 #ifdef RUBY_FUNCTION_NAME_STRING
 # define rb_sys_fail_path(path) rb_sys_fail_path_in(RUBY_FUNCTION_NAME_STRING, path)
 # define rb_syserr_fail_path(err, path) rb_syserr_fail_path_in(RUBY_FUNCTION_NAME_STRING, (err), (path))
+# define rb_syserr_new_path(err, path) rb_syserr_new_path_in(RUBY_FUNCTION_NAME_STRING, (err), (path))
 #else
 # define rb_sys_fail_path(path) rb_sys_fail_str(path)
 # define rb_syserr_fail_path(err, path) rb_syserr_fail_str((err), (path))
+# define rb_syserr_new_path(err, path) rb_syserr_new_str((err), (path))
 #endif
 
 /* error.c */
@@ -79,6 +81,7 @@ int rb_bug_reporter_add(void (*func)(FILE *, void *), void *data);
 #ifdef RUBY_FUNCTION_NAME_STRING
 NORETURN(void rb_sys_fail_path_in(const char *func_name, VALUE path));
 NORETURN(void rb_syserr_fail_path_in(const char *func_name, int err, VALUE path));
+VALUE rb_syserr_new_path_in(const char *func_name, int n, VALUE path);
 #endif
 RUBY_SYMBOL_EXPORT_END