[mono][interp] Properly initialize fields of LocalValue (#80795)

We were storing uninitialized values. Bug caught with valgrind, hopefully fixes some real crashes.

diff --git a/src/mono/mono/mini/interp/transform.c b/src/mono/mono/mini/interp/transform.c
index 4cdcd53..3ffe7a9 100644 (file)
--- a/src/mono/mono/mini/interp/transform.c
+++ b/src/mono/mono/mini/interp/transform.c
@@ -8801,6 +8801,8 @@ interp_fold_unop (TransformData *td, LocalValue *local_defs, InterpInst *ins)
        }
 
        local_ref_count [sreg]--;
+       result.ins = ins;
+       result.ref_count = 0;
        local_defs [dreg] = result;
 
        return ins;
@@ -8978,6 +8980,8 @@ interp_fold_binop (TransformData *td, LocalValue *local_defs, InterpInst *ins, g
 
        local_ref_count [sreg1]--;
        local_ref_count [sreg2]--;
+       result.ins = ins;
+       result.ref_count = 0;
        local_defs [dreg] = result;
        return ins;
 }