1 files changed, 3 insertions, 1 deletions

diff --git a/shell/ash.c b/shell/ash.c
index b707d00d0..f3a2c6952 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -13042,6 +13042,7 @@ expandstr(const char *ps, int syntax_type)
 {
         union node n;
         int saveprompt;
+        struct parsefile *file_stop = g_parsefile;
 
         /* XXX Fix (char *) cast. */
         setinputstring((char *)ps);
@@ -13068,7 +13069,8 @@ expandstr(const char *ps, int syntax_type)
 
         doprompt = saveprompt;
 
-        popfile();
+        /* Try: PS1='`xxx(`' */
+        unwindfiles(file_stop);
 
         n.narg.type = NARG;
         n.narg.next = NULL;