Add a check for NULL nlr_top in nlr_jump.

If no nlr_buf has been pushed, and an nlr_jump is called, then control
is transferred to nlr_jump_fail (which should bail out with a fatal
error).

1 files changed, 6 insertions, 6 deletions

diff --git a/unix-cpy/main.c b/unix-cpy/main.c
index 944d26e9f3..6cdd72c5da 100644
--- a/unix-cpy/main.c
+++ b/unix-cpy/main.c
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
@@ -74,12 +75,11 @@ int main(int argc, char **argv) {
     return 0;
 }
 
-// for sqrt
-#include <math.h>
-machine_float_t machine_sqrt(machine_float_t x) {
-    return sqrt(x);
-}
-
 mp_import_stat_t mp_import_stat(const char *path) {
     return MP_IMPORT_STAT_NO_EXIST;
 }
+
+void nlr_jump_fail(void *val) {
+    printf("FATAL: uncaught NLR %p\n", val);
+    exit(1);
+}