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-rw-r--r--src/script.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/script.cpp b/src/script.cpp
index a40ae5b1db..f65508aacc 100644
--- a/src/script.cpp
+++ b/src/script.cpp
@@ -1658,6 +1658,11 @@ bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const C
if (!scriptSig.IsPushOnly()) // scriptSig must be literals-only
return false; // or validation fails
+ // stackCopy cannot be empty here, because if it was the
+ // P2SH HASH <> EQUAL scriptPubKey would be evaluated with
+ // an empty stack and the EvalScript above would return false.
+ assert(!stackCopy.empty());
+
const valtype& pubKeySerialized = stackCopy.back();
CScript pubKey2(pubKeySerialized.begin(), pubKeySerialized.end());
popstack(stackCopy);