fix(compiler): add condition to see whether the element may be an component

fixes vuejs#10152

Author: zrh122

src/compiler/parser/index.js

@@ -86,8 +86,12 @@ export function parse (
   platformMustUseProp = options.mustUseProp || no
   platformGetTagNamespace = options.getTagNamespace || no
   const isReservedTag = options.isReservedTag || no
-  maybeComponent = (el: ASTElement) => !!el.component || !isReservedTag(el.tag)
-
+  maybeComponent = (el: ASTElement) => !!(
+    el.component ||
+    el.attrsMap[':is'] ||
+    el.attrsMap['v-bind:is'] ||
+    !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+  )
   transforms = pluckModuleFunction(options.modules, 'transformNode')
   preTransforms = pluckModuleFunction(options.modules, 'preTransformNode')
   postTransforms = pluckModuleFunction(options.modules, 'postTransformNode')

test/unit/modules/compiler/parser.spec.js

@@ -881,4 +881,20 @@ describe('parser', () => {
     expect(ast.children[2].type).toBe(3)
     expect(ast.children[2].text).toBe('\ndef')
   })
+
+  // #10152
+  it('not warn when scoped slot used inside of dynamic component on regular element', () => {
+    parse(`
+      <div>
+        <div is="customComp" v-slot="slotProps"></div>
+        <div :is="'customComp'" v-slot="slotProps"></div>
+        <div v-bind:is="'customComp'" v-slot="slotProps"></div>
+      </div>
+    `, baseOptions)
+    expect('v-slot can only be used on components or <template>').not.toHaveBeenWarned()
+
+    parse(`<div is="customComp"><template v-slot="slotProps"></template></div>`, baseOptions)
+    expect(`<template v-slot> can only appear at the root level inside the receiving the component`)
+      .not.toHaveBeenWarned()
+  })
 })