Change r60575 broke test_compile:
there is no need to emit co_lnotab item when both offsets are zeros.
diff --git a/Python/compile.c b/Python/compile.c
index f9b5ac4..83a8fc0 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -3560,6 +3560,9 @@
 	assert(d_bytecode >= 0);
 	assert(d_lineno >= 0);
 
+	if(d_bytecode == 0 && d_lineno == 0)
+		return 1;
+
 	if (d_bytecode > 255) {
 		int j, nbytes, ncodes = d_bytecode / 255;
 		nbytes = a->a_lnotab_off + 2 * ncodes;