fix(compiler): bail strigification on runtime constant expressions

packages/compiler-sfc/src/templateTransformAssetUrl.ts

@@ -126,11 +126,14 @@ function getImportsExpressionExp(
     }
     const name = `_imports_${importsArray.length}`
     const exp = createSimpleExpression(name, false, loc, true)
+    exp.isRuntimeConstant = true
     context.imports.add({ exp, path })
     if (hash && path) {
-      return context.hoist(
+      const ret = context.hoist(
         createSimpleExpression(`${name} + '${hash}'`, false, loc, true)
       )
+      ret.isRuntimeConstant = true
+      return ret
     } else {
       return exp
     }

packages/compiler-sfc/src/templateTransformSrcset.ts

@@ -86,11 +86,14 @@ export const transformSrcset: NodeTransform = (node, context) => {
             }
           })
 
+          const hoisted = context.hoist(compoundExpression)
+          hoisted.isRuntimeConstant = true
+
           node.props[index] = {
             type: NodeTypes.DIRECTIVE,
             name: 'bind',
             arg: createSimpleExpression('srcset', true, attr.loc),
-            exp: context.hoist(compoundExpression),
+            exp: hoisted,
             modifiers: [],
             loc: attr.loc
           }