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diff --git a/bin/sh/main.c b/bin/sh/main.c
--- a/bin/sh/main.c
+++ b/bin/sh/main.c
@@ -100,7 +100,12 @@
int
main(int argc, char *argv[])
{
- struct stackmark smark = {0}, smark2;
+ /*
+ * As smark is accessed after a longjmp, it cannot be a local in main().
+ * The C standard specifies that the values of non-volatile local variables
+ * are unspecified after a jump if modified between the setjmp and longjmp.
+ */
+ static struct stackmark smark, smark2;
volatile int state;
char *shinit;

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