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java overload resolution: fix NPE

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found by property testing

GitOrigin-RevId: b45cb07402ad58a37886b7f1b5afb62bca2746fe
This commit is contained in:
Anna.Kozlova
2019-12-04 09:58:00 +01:00
committed by intellij-monorepo-bot
parent 94a4084b0e
commit 4ad4e7d908
2 changed files with 18 additions and 1 deletions
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3
java/java-psi-impl/src/com/intellij/psi/impl/source/resolve/graphInference/InferenceSession.java
View File

@@ -157,6 +157,7 @@ public class InferenceSession {
if (args[i] != null && isPertinentToApplicability(args[i], method)) {
PsiType parameterType = getParameterType(parameters, i, mySiteSubstitutor, varargs);
LOG.assertTrue(parameterType != null);
if (!ignoreLambdaConstraintTree(args[i])) {
addConstraint(new ExpressionCompatibilityConstraint(args[i], substituteWithInferenceVariables(parameterType)));
}
@@ -1660,7 +1661,7 @@ public class InferenceSession {
final int paramsLength = !varargs ? parameters1.length : Math.max(parameters1.length, parameters2.length) - 1;
for (int i = 0; i < paramsLength; i++) {
PsiType sType = getParameterType(parameters1, i, siteSubstitutor1, false);
PsiType sType = getParameterType(parameters1, i, siteSubstitutor1, varargs);
PsiType tType = session.substituteWithInferenceVariables(getParameterType(parameters2, i, siteSubstitutor1, varargs));
if (PsiUtil.isRawSubstitutor(m2, siteSubstitutor1)) {
tType = TypeConversionUtil.erasure(tType);

16
java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/overloadResolution/LongerParamsWhenVarargs.java
View File

@@ -18,4 +18,20 @@ interface Node<<warning descr="Type parameter 'T' is never used">T</warning>> {
Node.of(1, Node.of(2), Node.of(3));
Node.<Integer>of(1, Node.<Integer>of(2), Node.<Integer> of(3));
}
}
class MyTest {
void foo(String... s) {
System.out.println(s);
}
<T> void foo(T t, String t3, T... s) {
System.out.println(t);
System.out.println(t3);
System.out.println(s);
}
{
foo(" ", " ", "");
}
}