Better diagnostic exception message in MissingMainCoroutineDispatcher

Author: qwwdfsad

kotlinx-coroutines-core/common/src/internal/Scopes.kt

@@ -36,5 +36,5 @@ internal open class ScopeCoroutine<in T>(
 internal class ContextScope(context: CoroutineContext) : CoroutineScope {
     override val coroutineContext: CoroutineContext = context
     // CoroutineScope is used intentionally for user-friendly representation
-    override fun toString(): String = "CoroutineScope(coroutineContext = $coroutineContext)"
+    override fun toString(): String = "CoroutineScope(coroutineContext=$coroutineContext)"
 }

kotlinx-coroutines-core/jvm/src/internal/MainDispatchers.kt

@@ -89,7 +89,8 @@ private class MissingMainCoroutineDispatcher(
         if  (cause == null) {
             throw IllegalStateException(
                 "Module with the Main dispatcher is missing. " +
-                    "Add dependency providing the Main dispatcher, e.g. 'kotlinx-coroutines-android'"
+                    "Add dependency providing the Main dispatcher, e.g. 'kotlinx-coroutines-android' " +
+                        "and ensure it has the same version as 'kotlinx-coroutines-core'"
             )
         } else {
             val message = "Module with the Main dispatcher had failed to initialize" + (errorHint?.let { ". $it" } ?: "")