tests/stress: Adjust bytecode_limit test so it can SKIP if no memory.

Signed-off-by: Damien George <damien@micropython.org>

tests/stress/bytecode_limit.py

@@ -2,6 +2,16 @@
 
 body = " with f()()() as a:\n  try:\n   f()()()\n  except Exception:\n   pass\n"
 
+# Test overflow of jump offset.
+for n in (430, 431, 432, 433):
+    try:
+        exec("cond = 0\nif cond:\n" + body * n + "else:\n print('cond false')\n")
+    except MemoryError:
+        print("SKIP")
+        raise SystemExit
+    except RuntimeError:
+        print("RuntimeError")
+
 # Test changing size of code info (source line/bytecode mapping) due to changing
 # bytecode size in the final passes.  This test is very specific to how the
 # code info is encoded, and how jump offsets shrink in the final passes.  This
@@ -24,10 +34,3 @@ x = [1 if x else 123]
 print(x)
 """
 )
-
-# Test overflow of jump offset.
-for n in (430, 431, 432, 433):
-    try:
-        exec("cond = 0\nif cond:\n" + body * n + "else:\n print('cond false')\n")
-    except RuntimeError:
-        print("RuntimeError")

tests/stress/bytecode_limit.py.exp

-[123]
 cond false
 cond false
 RuntimeError
 RuntimeError
+[123]