[JNI]: Fix Race condition

Author: satoshiotomakan

jni/java/wallet/core/java/GenericPhantomReference.java

@@ -4,12 +4,13 @@
 import java.lang.ref.ReferenceQueue;
 import java.util.Set;
 import java.util.HashSet;
+import java.util.Collections;
 
 public class GenericPhantomReference extends PhantomReference<Object> {
     private final long nativeHandle;
     private final OnDeleteCallback onDeleteCallback;
 
-    private static final Set<GenericPhantomReference> references = new HashSet<>();
+    private static final Set<GenericPhantomReference> references = Collections.synchronizedSet(new HashSet<>());
     private static final ReferenceQueue<Object> queue = new ReferenceQueue<>();
 
     static {

kotlin/wallet-core-kotlin/src/commonAndroidJvmMain/kotlin/com/trustwallet/core/GenericPhantomReference.kt

@@ -2,6 +2,7 @@ package com.trustwallet.core
 
 import java.lang.ref.PhantomReference
 import java.lang.ref.ReferenceQueue
+import java.util.Collections
 
 internal class GenericPhantomReference private constructor(
     referent: Any,
@@ -10,7 +11,7 @@ internal class GenericPhantomReference private constructor(
 ) : PhantomReference<Any>(referent, queue) {
 
     companion object {
-        private val references: MutableSet<GenericPhantomReference> = HashSet()
+        private val references: MutableSet<GenericPhantomReference> = Collections.synchronizedSet(HashSet())
         private val queue: ReferenceQueue<Any> = ReferenceQueue()
 
         init {

tools/install-rust-dependencies

@@ -27,5 +27,5 @@ cargo install cbindgen --locked
 
 if [[ "$1" == "dev" ]]; then
   rustup component add llvm-tools-preview clippy rustfmt
-  cargo install cargo-llvm-cov --locked
+  cargo install --version 0.6.14 cargo-llvm-cov --locked
 fi