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Avoid undefined behavior #1875

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Avoid undefined behavior #1875

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3 changes: 2 additions & 1 deletion libraries/chain/include/eosio/chain/wasm_eosio_injection.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -151,7 +151,8 @@ namespace eosio { namespace chain { namespace wasm_injections {
static constexpr bool post = false;
static void init() {}
static void accept( wasm_ops::instr* inst, wasm_ops::visitor_arg& arg ) {
wasm_ops::op_types<>::call_t* call_inst = reinterpret_cast<wasm_ops::op_types<>::call_t*>(inst);
// Cast to the exact dynamic type to avoid undefined behavior
auto* call_inst = static_cast<wasm_ops::call<fix_call_index>*>(inst);
auto mapped_index = injector_utils::injected_index_mapping.find(call_inst->field);

if ( mapped_index != injector_utils::injected_index_mapping.end() ) {
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