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-rw-r--r--tests/basics/int_big_mod.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/tests/basics/int_big_mod.py b/tests/basics/int_big_mod.py
index 77c0ffc468..f383553c18 100644
--- a/tests/basics/int_big_mod.py
+++ b/tests/basics/int_big_mod.py
@@ -8,3 +8,10 @@ for i in range(11):
y = delta * (j)# - 5) # TODO reinstate negative number test when % is working with sign correctly
if y != 0:
print(x % y)
+
+# these check an edge case on 64-bit machines where two mpz limbs
+# are used and the most significant one has the MSB set
+x = 0x8000000000000000
+print((x + 1) % x)
+x = 0x86c60128feff5330
+print((x + 1) % x)