fix accidental save (and restore) of sigmask when interpreting try (#59878)

Noticed during bug hunting of

ericphanson/LicenseCheck.jl#11 (comment)
and may cause performance degradation for interpreter-executed try
blocks or scope entry.

Co-authored-by: Dilum Aluthge <[email protected]>
(cherry picked from commit c1353ac)

Author: 2 people

src/interpreter.c

@@ -545,15 +545,15 @@ static jl_value_t *eval_body(jl_array_t *stmts, interpreter_state *s, size_t ip,
                 // replaced later
                 JL_GC_PUSH1(&scope);
                 ct->scope = scope;
-                if (!jl_setjmp(__eh.eh_ctx, 1)) {
+                if (!jl_setjmp(__eh.eh_ctx, 0)) {
                     ct->eh = &__eh;
                     eval_body(stmts, s, next_ip, toplevel);
                     jl_unreachable();
                 }
                 JL_GC_POP();
             }
             else {
-                if (!jl_setjmp(__eh.eh_ctx, 1)) {
+                if (!jl_setjmp(__eh.eh_ctx, 0)) {
                     ct->eh = &__eh;
                     eval_body(stmts, s, next_ip, toplevel);
                     jl_unreachable();