Merge pull request #684 from AntelopeIO/gh_425

[1.0] Update `payloadless` contract to avoid UB in shift operator.
AntelopeIO · Sep 3, 2024 · 21cec1f · 21cec1f
2 parents 711d7a7 + e54ebd9
commit 21cec1f
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diff --git a/unittests/test-contracts/payloadless/payloadless.cpp b/unittests/test-contracts/payloadless/payloadless.cpp
@@ -29,8 +29,8 @@ bool is_prime(int p) {
 bool is_mersenne_prime(int p) {
    if (p == 2) return true;
 
-   const long long unsigned m_p = (1LLU << p) - 1;
    long long unsigned s = 4;
+   const long long unsigned m_p = (1LLU << (p % (sizeof(s) * 8))) - 1;
    int i;
    for (i = 3; i <= p; i++) {
       s = (s * s - 2) % m_p;

diff --git a/unittests/test-contracts/payloadless/payloadless.wasm b/unittests/test-contracts/payloadless/payloadless.wasm