fix #1190

mgravell · mgravell · commit 68eea4ff2629 · 2019-02-09T12:22:11.000Z
diff --git a/Dapper/SqlMapper.cs b/Dapper/SqlMapper.cs
@@ -2416,7 +2416,7 @@ internal static Action<IDbCommand, object> CreateParamInfoGenerator(Identity ide
             il.Emit(OpCodes.Ldarg_1); // stack is now [untyped-param]
             if (isStruct)
             {
-                il.DeclareLocal(type.MakePointerType());
+                il.DeclareLocal(type.MakeByRefType()); // note: ref-local
                 il.Emit(OpCodes.Unbox, type); // stack is now [typed-param]
             }
             else

Original file line number	Diff line number	Diff line change
`@@ -2416,7 +2416,7 @@ internal static Action<IDbCommand, object> CreateParamInfoGenerator(Identity ide`
`2416`	`2416`	`il.Emit(OpCodes.Ldarg_1); // stack is now [untyped-param]`
`2417`	`2417`	`if (isStruct)`
`2418`	`2418`	`{`
`2419`		`- il.DeclareLocal(type.MakePointerType());`
	`2419`	`+ il.DeclareLocal(type.MakeByRefType()); // note: ref-local`
`2420`	`2420`	`il.Emit(OpCodes.Unbox, type); // stack is now [typed-param]`
`2421`	`2421`	`}`
`2422`	`2422`	`else`