There is a bug in the rendering of Prompt templates in StringTemplate mode

我的pom如下

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>4.1.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>demo</description>
    <properties>
        <java.version>21</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.ai</groupId>
            <artifactId>spring-ai-starter-model-openai</artifactId>
            <version>2.0.0-RC2</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

配置文件如下：

spring:
  application:
    name: demo
  ai:
    openai:
      base-url: http://192.168.10.233:3000/v1
      api-key: sk-NV44FDGiuspxz27Z1eZqaR2l4YIXI1X1pHgGR5w12i2SI3vS

代码如下：

@Test
    void contextLoads() {
        Map<String, Object> map = new HashMap<>();
        map.put("myMap", Map.of("a", 1, "b", 2, "c", 3));
//        map.put("k", null);
        System.out.println(PromptTemplate.builder().template("""
				{myMap:{k | key={k}, value={myMap.(k)}\n}}
				""").build().render(map));
    }

错误信息如下：
java.lang.IllegalStateException: Not all variables were replaced in the template. Missing variable names are: [k].

at org.springframework.ai.template.st.StTemplateRenderer.validate(StTemplateRenderer.java:145)
at org.springframework.ai.template.st.StTemplateRenderer.apply(StTemplateRenderer.java:111)
at org.springframework.ai.chat.prompt.PromptTemplate.render(PromptTemplate.java:143)
at com.example.demo.DemoApplicationTests.contextLoads(DemoApplicationTests.java:20)

只要我取消注释的那行代码就可以正常运行，正常运行结果为
key=c, value=3
key=b, value=2
key=a, value=1
prompt模板中k是模板内变量不应该要求外面传一个k的变量
依赖分析如下