package/busybox/busybox-0002-busybox-1.22.1-ash.patch


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--- busybox-1.22.1/shell/ash.c
+++ busybox-1.22.1-ash/shell/ash.c
@@ -13014,7 +13014,7 @@ init(void)
 		setvar2("PPID", utoa(getppid()));
 #if ENABLE_ASH_BASH_COMPAT
 		p = lookupvar("SHLVL");
-		setvar2("SHLVL", utoa(p ? atoi(p) + 1 : 1));
+		setvar("SHLVL", utoa((p ? atoi(p) : 0) + 1), VEXPORT);
 #endif
 		p = lookupvar("PWD");
 		if (p) {