JDK 11.0.2 编译因匿名参数化类类型推断上的 javac NPE 而失败 [英] JDK 11.0.2 compilation fails with javac NPE on anonymous parameterized class type inference

问题描述

代码(spring-web 5.1.2)

Code (spring-web 5.1.2)

public static void main(String[] args) {
    RestTemplate restTemplate = new RestTemplate();

    HttpHeaders headers = new HttpHeaders();
    headers.set(HttpHeaders.AUTHORIZATION, "token");
    HttpEntity<Object> requestEntity = new HttpEntity<>(headers);

    ResponseEntity<Object> test = restTemplate.exchange(
            "https://example.com",
            HttpMethod.GET,
            new HttpEntity<>(headers),
            new ParameterizedTypeReference<>() { // fails here
            });
}

OracleJDK 1.8(预期输出)

无法推断类型参数org.springframework.core.ParameterizedTypeReference

cannot infer type arguments for org.springframework.core.ParameterizedTypeReference

原因:不能对匿名内部类使用<>"

reason: cannot use '<>' with anonymous inner classes

OracleJDK 11.0.2(非预期输出)

编译器消息文件损坏:key=compiler.misc.msg.bug参数=11.0.2、{1}、{2}、{3}、{4}、{5}、{6}、{7}java.lang.NullPointerException 在jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitApply(Flow.java:1235)在jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1634)在jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)在jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:398)在jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitVarDef(Flow.java:989)
...

compiler message file broken: key=compiler.misc.msg.bug arguments=11.0.2, {1}, {2}, {3}, {4}, {5}, {6}, {7} java.lang.NullPointerException at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitApply(Flow.java:1235) at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1634) at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49) at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:398) at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitVarDef(Flow.java:989)
...

如果我将菱形运算符更改为显式类型

If I change diamond operator to explicit type

new ParameterizedTypeReference<>(){} 到 new ParameterizedTypeReference