FIR: fix contract deserialization for assertIs<T>

compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts/assertIs.fir.txt

@@ -0,0 +1,5 @@
+FILE: assertIs.kt
+    public final fun foo(arg: R|kotlin/Any|): R|kotlin/Unit| {
+        R|kotlin/test/assertIs|<R|kotlin/String|>(R|<local>/arg|, String())
+        R|<local>/arg|.R|kotlin/String.length|
+    }

compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts/assertIs.kt

@@ -0,0 +1,6 @@
+import kotlin.test.*
+
+fun foo(arg: Any) {
+    assertIs<String>(arg, "")
+    arg.length
+}

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticTestGenerated.java

@@ -5445,6 +5445,12 @@ public class FirDiagnosticTestGenerated extends AbstractFirDiagnosticTest {
                 KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts"), Pattern.compile("^([^.]+)\\.kt$"), null, true);
             }
 
+            @Test
+            @TestMetadata("assertIs.kt")
+            public void testAssertIs() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts/assertIs.kt");
+            }
+
             @Test
             @TestMetadata("tryWithLambdaInside.kt")
             public void testTryWithLambdaInside() throws Exception {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticsWithLightTreeTestGenerated.java

@@ -5445,6 +5445,12 @@ public class FirDiagnosticsWithLightTreeTestGenerated extends AbstractFirDiagnos
                 KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts"), Pattern.compile("^([^.]+)\\.kt$"), null, true);
             }
 
+            @Test
+            @TestMetadata("assertIs.kt")
+            public void testAssertIs() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts/assertIs.kt");
+            }
+
             @Test
             @TestMetadata("tryWithLambdaInside.kt")
             public void testTryWithLambdaInside() throws Exception {

compiler/fir/fir-deserialization/src/org/jetbrains/kotlin/fir/deserialization/FirMemberDeserializer.kt

@@ -426,6 +426,7 @@ class FirMemberDeserializer(private val c: FirDeserializationContext) {
             versionRequirementsTable = c.versionRequirementTable
         }
         if (proto.hasContract()) {
+            val contractDeserializer = if (proto.typeParameterList.isEmpty()) this.contractDeserializer else FirContractDeserializer(local)
             val contractDescription = contractDeserializer.loadContract(proto.contract, simpleFunction)
             if (contractDescription != null) {
                 simpleFunction.replaceContractDescription(contractDescription)

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/diagnostic/compiler/based/DiagnosisCompilerFirTestdataTestGenerated.java

@@ -5445,6 +5445,12 @@ public class DiagnosisCompilerFirTestdataTestGenerated extends AbstractDiagnosis
                 KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts"), Pattern.compile("^([^.]+)\\.kt$"), null, true);
             }
 
+            @Test
+            @TestMetadata("assertIs.kt")
+            public void testAssertIs() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts/assertIs.kt");
+            }
+
             @Test
             @TestMetadata("tryWithLambdaInside.kt")
             public void testTryWithLambdaInside() throws Exception {