Failing regression test from diffblue#933

regression/cbmc/cpp2/main.cpp

@@ -0,0 +1,47 @@
+#include <cassert>
+#include <stdint.h>
+#include <stdbool.h>
+
+#undef HOTFIX
+
+typedef struct {
+  uint32_t value_31_0 : 32;
+} signal32_t;
+
+typedef struct {
+  uint8_t value_0_0 : 1;
+} signal1_t;
+
+static inline bool yosys_simplec_get_bit_25_of_32(const signal32_t *sig)
+{
+  return (sig->value_31_0 >> 25) & 1;
+}
+
+struct rvfi_insn_srai_state_t
+{
+  signal32_t rvfi_insn;
+  signal32_t rvfi_rs1_rdata;
+  signal1_t _abc_1398_n364;
+  signal1_t _abc_1398_n363;
+};
+
+void test(rvfi_insn_srai_state_t state, bool valid)
+{
+#ifndef HOTFIX
+  state._abc_1398_n364.value_0_0 = yosys_simplec_get_bit_25_of_32(&state.rvfi_insn) ?
+      yosys_simplec_get_bit_25_of_32(&state.rvfi_rs1_rdata) : state._abc_1398_n363.value_0_0;
+#else
+  state._abc_1398_n364.value_0_0 = yosys_simplec_get_bit_25_of_32(&state.rvfi_insn) ?
+      yosys_simplec_get_bit_25_of_32(&state.rvfi_rs1_rdata) : (bool)state._abc_1398_n363.value_0_0;
+#endif
+
+  assert(valid);
+}
+
+int main(int argc, char* argv[])
+{
+	rvfi_insn_srai_state_t state;
+  bool valid;
+  test(state, valid);
+  return 0;
+}

regression/cbmc/cpp2/test.desc

@@ -0,0 +1,11 @@
+KNOWNBUG
+main.cpp
+
+^EXIT=0$
+^SIGNAL=0$
+^VERIFICATION SUCCESSFUL$
+--
+^warning: ignoring
+^equality without matching types
+--
+This has been reported as #933.