Handling of try / catch / finally with 'Nothing' in all catch blocks #KT-10735 Fixed

compiler/testData/diagnostics/tests/smartCasts/varnotnull/initInTryReturnInCatch.kt

@@ -0,0 +1,80 @@
+// See also KT-10735
+fun test() {
+    var a: Int?
+    try {
+        a = 3
+    }
+    catch (e: Exception) {
+        return
+    }
+    <!DEBUG_INFO_SMARTCAST!>a<!>.hashCode() // a is never null here
+}
+class A: Exception()
+class B: Exception()
+fun test2() {
+    var a: Int?
+    try {
+        a = 4
+    }
+    catch (e: A) {
+        return
+    }
+    catch (e: B) {
+        return
+    }
+    <!DEBUG_INFO_SMARTCAST!>a<!>.hashCode() // a is never null here
+}
+fun test3() {
+    var a: Int? = null
+    try {
+        a = 5
+    }
+    catch (e: A) {
+        // do nothing
+    }
+    catch (e: B) {
+        return
+    }
+    a<!UNSAFE_CALL!>.<!>hashCode() // a is nullable here
+}
+fun test4() {
+    var a: Int? = null
+    try {
+        // do nothing
+    }
+    catch (e: A) {
+        return
+    }
+    catch (e: B) {
+        return
+    }
+    a<!UNSAFE_CALL!>.<!>hashCode() // a is nullable here
+}
+fun test5() {
+    var a: Int?// = null
+    try {
+        <!UNUSED_VALUE!>a =<!> 3
+    }
+    catch (e: Exception) {
+        return
+    }
+    finally {
+        // Error: KT-9825
+        <!UNUSED_VALUE!>a =<!> 5
+    }
+    <!DEBUG_INFO_SMARTCAST!>a<!>.hashCode() // a is never null here
+}
+fun test6() {
+    var a: Int?// = null
+    try {
+        <!UNUSED_VALUE!>a =<!> 3
+    }
+    catch (e: Exception) {
+        return
+    }
+    finally {
+        // Error: KT-9825
+        <!UNUSED_VALUE!>a =<!> null
+    }
+    <!DEBUG_INFO_CONSTANT!>a<!><!UNSAFE_CALL!>.<!>hashCode() // a is null here
+}

compiler/testData/diagnostics/tests/smartCasts/varnotnull/initInTryReturnInCatch.txt

@@ -0,0 +1,26 @@
+package
+
+public fun test(): kotlin.Unit
+public fun test2(): kotlin.Unit
+public fun test3(): kotlin.Unit
+public fun test4(): kotlin.Unit
+public fun test5(): kotlin.Unit
+public fun test6(): kotlin.Unit
+
+public final class A : java.lang.Exception {
+    public constructor A()
+    public final override /*1*/ /*fake_override*/ val cause: kotlin.Throwable?
+    public final override /*1*/ /*fake_override*/ val message: kotlin.String?
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class B : java.lang.Exception {
+    public constructor B()
+    public final override /*1*/ /*fake_override*/ val cause: kotlin.Throwable?
+    public final override /*1*/ /*fake_override*/ val message: kotlin.String?
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}