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https://issues.apache.org/jira/browse/GROOVY-12313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18130080#comment-18130080
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ASF GitHub Bot commented on GROOVY-12313:
-----------------------------------------
testlens-app[bot] commented on PR #3002:
URL: https://github.com/apache/groovy/pull/3002#issuecomment-6330437736
## ✅ All tests passed ✅
🏷️ Commit: d9bd0c1752079a87bd0ba7c3222c09d44d11fb48
▶️ Tests: 122373 executed
⚪️ Checks: 32/32 completed
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> STC: instanceof-inferred type leaks to else-branch when the same
> VariableExpression node is reused
> --------------------------------------------------------------------------------------------------
>
> Key: GROOVY-12313
> URL: https://issues.apache.org/jira/browse/GROOVY-12313
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 5.0.3, 4.0.31
> Reporter: Björn Kautler
> Priority: Major
>
> With this in groovyconsole.dev
> {code:java}
> @groovy.transform.CompileStatic
> class Foo extends Specification {
> def foo() {
> expect:
> true
> where:
> [a, b] << [['a', 'b']]
> }
> }
> {code}
> you get
> {code:java}
> Cannot cast object '[a, b]' with class 'java.util.ArrayList' to class
> 'java.util.Map' due to: groovy.lang.GroovyRuntimeException: Could not find
> matching constructor for: java.util.Map(String, String){code}
> The AST transformed code after class generation phase for this is
> {code:java}
> @org.spockframework.runtime.model.DataProcessorMetadata(dataVariables =
> ['a', 'b'])
> public java.lang.Object $spock_feature_0_0proc(java.lang.Object
> $spock_p0) {
> java.lang.Object a = ((java.lang.Object) $spock_p0 instanceof
> java.util.Map ? $spock_p0.getAt('a') : $spock_p0.getAt(0))
> java.lang.Object b = ((java.lang.Object) $spock_p0 instanceof
> java.util.Map ? $spock_p0.getAt('b') : $spock_p0.getAt(1))
> return new java.lang.Object[]{ a , b }
> } {code}
> where {{$spock_p0}} is given as {{{}['a', 'b']{}}}.
> Without static compilation this works fine and runs the expected iterations.
> With static compilation and indy switched off, the generated and then
> decompiled bytecode is this:
> {code:java}
> @DataProcessorMetadata(
> dataVariables = {"a", "b"}
> )
> public Object $spock_feature_0_0proc(Object $spock_p0) {
> Object a = $spock_p0 instanceof Map ?
> DefaultGroovyMethods.getAt((Map)ScriptBytecodeAdapter.castToType($spock_p0,
> Map.class), "a") :
> DefaultGroovyMethods.getAt((Map)ScriptBytecodeAdapter.castToType($spock_p0,
> Map.class), 0);
> Object b = $spock_p0 instanceof Map ?
> DefaultGroovyMethods.getAt((Map)ScriptBytecodeAdapter.castToType($spock_p0,
> Map.class), "b") :
> DefaultGroovyMethods.getAt((Map)ScriptBytecodeAdapter.castToType($spock_p0,
> Map.class), 1);
> return new Object[]{a, b};
> } {code}
> So with static compilation the inferred {{Map}} type somehow leaks into the
> else-branch of the ternary expression and causes this class-cast exception.
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