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https://issues.apache.org/jira/browse/GROOVY-8176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15999698#comment-15999698
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ASF GitHub Bot commented on GROOVY-8176:
----------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/groovy/pull/535
> tap - exception in phase 'instruction selection'
> ------------------------------------------------
>
> Key: GROOVY-8176
> URL: https://issues.apache.org/jira/browse/GROOVY-8176
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 2.5.0-alpha-1
> Reporter: Cazacu Mihai
>
> {code}
> import groovy.transform.CompileStatic
> @CompileStatic
> abstract class Person {
> String firstName
> String lastName
> }
> @CompileStatic
> class Student extends Person {
> Set<String> courses
> }
> @CompileStatic
> final class Converter {
> static <P extends Person> P toUser1(P person, Map map) { // ok
> if (!map) {
> return person
> }
> person.firstName = map['firstName']
> person.lastName = map['lastName']
> return person
> }
> static <P extends Person> P toUser2(P person, Map map) { // ok
> if (!map) {
> return person
> }
> person.tap {
> firstName = map['firstName']
> lastName = map['lastName']
> }
> }
> static <P extends Person> P toUser3(P person, Map map) { // ok
> person.tap {
> firstName = map['firstName']
> lastName = map['lastName']
> }
> }
> // Caught: BUG! exception in phase 'instruction selection' in source
> unit '/reproducer.groovy' unexpected NullpointerException
> static <P extends Person> P toUser4(P person, Map map) {
> !map ? person : person.tap {
> firstName = map['firstName']
> lastName = map['lastName']
> }
> }
> // static Student toStudent(Map map) {
> // !map ? null : toUser4(new Student(), map)
> // }
> }
> @CompileStatic
> class Reproducer {
> static void reproduce() {
> Map map = [firstName: 'John', lastName: 'Doe']
> println Converter.toUser1(new Student(), map).dump()
> println Converter.toUser2(new Student(), map).dump()
> println Converter.toUser3(new Student(), map).dump()
> //println Converter.toUser4(new Student(), map).dump()
> //println Converter.toStudent(map).dump()
> }
> }
> Reproducer.reproduce()
> {code}
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