diff --git a/backend/mirai-console/src/internal/MiraiConsoleImplementationBridge.kt b/backend/mirai-console/src/internal/MiraiConsoleImplementationBridge.kt
index 67b45b9b7..be92004bc 100644
--- a/backend/mirai-console/src/internal/MiraiConsoleImplementationBridge.kt
+++ b/backend/mirai-console/src/internal/MiraiConsoleImplementationBridge.kt
@@ -72,7 +72,7 @@ internal object MiraiConsoleImplementationBridge : CoroutineScope, MiraiConsoleI
     MiraiConsole {
     override val pluginCenter: PluginCenter get() = throw UnsupportedOperationException("PluginCenter is not supported yet")
 
-    private val instance: MiraiConsoleImplementation by MiraiConsoleImplementation.Companion::instance
+    internal val instance: MiraiConsoleImplementation by MiraiConsoleImplementation.Companion::instance
     override val buildDate: Instant by MiraiConsoleBuildConstants::buildDate
     override val version: SemVersion by MiraiConsoleBuildConstants::version
     override val rootPath: Path by instance::rootPath
diff --git a/backend/mirai-console/src/internal/data/MultiFilePluginDataStorageImpl.kt b/backend/mirai-console/src/internal/data/MultiFilePluginDataStorageImpl.kt
index a9e9a1f2c..a099e3515 100644
--- a/backend/mirai-console/src/internal/data/MultiFilePluginDataStorageImpl.kt
+++ b/backend/mirai-console/src/internal/data/MultiFilePluginDataStorageImpl.kt
@@ -12,6 +12,7 @@ package net.mamoe.mirai.console.internal.data
 import kotlinx.serialization.json.Json
 import net.mamoe.mirai.console.MiraiConsole
 import net.mamoe.mirai.console.data.*
+import net.mamoe.mirai.console.internal.util.report.ReportGenerator
 import net.mamoe.mirai.console.util.ConsoleExperimentalApi
 import net.mamoe.mirai.utils.MiraiLogger
 import net.mamoe.mirai.utils.SilentLogger
@@ -71,17 +72,40 @@ internal open class MultiFilePluginDataStorageImpl(
 
     @ConsoleExperimentalApi
     public override fun store(holder: PluginDataHolder, instance: PluginData) {
+        var yamlRendered: String? = null
         getPluginDataFile(holder, instance).writeText(
             kotlin.runCatching {
                 yaml.encodeToString(instance.updaterSerializer, Unit).also {
+                    yamlRendered = it
                     yaml.decodeAnyFromString(it) // test yaml
+                    error("Test error")
                 }
-            }.recoverCatching {
+            }.recoverCatching { exception ->
                 // Just use mainLogger for convenience.
                 MiraiConsole.mainLogger.warning(
                     "Could not save ${instance.saveName} in YAML format due to exception in YAML encoder. " +
                         "Please report this exception and relevant configurations to https://github.com/mamoe/mirai-console/issues/new",
-                    it
+                    exception
+                )
+                val reportPath = ReportGenerator.generateReport("YamlKt-Format-") {
+                    pw.println("Could not save ${instance.saveName} in YAML format due to exception in YAML encoder. ")
+                    pw.println("Please report this exception and relevant configurations to https://github.com/mamoe/mirai-console/issues/new")
+                    pw.println()
+                    yamlRendered?.let {
+                        title("Rendered YAML")
+                        pw.println(it)
+                        pw.println()
+                    }
+                    title("Exception")
+                    renderException(exception)
+                    renderCurrentThread()
+                }
+                MiraiConsole.mainLogger.warning(
+                    "Could not save ${instance.saveName} in YAML format due to exception in YAML encoder. " +
+                        "Please report this exception and relevant configurations to https://github.com/mamoe/mirai-console/issues/new"
+                )
+                MiraiConsole.mainLogger.warning(
+                    "Error Report location: $reportPath"
                 )
                 json.encodeToString(instance.updaterSerializer, Unit)
             }.getOrElse {
diff --git a/backend/mirai-console/src/internal/util/report/ReportGenerator.kt b/backend/mirai-console/src/internal/util/report/ReportGenerator.kt
new file mode 100644
index 000000000..35f3b9442
--- /dev/null
+++ b/backend/mirai-console/src/internal/util/report/ReportGenerator.kt
@@ -0,0 +1,204 @@
+/*
+ * Copyright 2019-2020 Mamoe Technologies and contributors.
+ *
+ * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
+ * Use of this source code is governed by the GNU AFFERO GENERAL PUBLIC LICENSE version 3 license that can be found through the following link.
+ *
+ * https://github.com/mamoe/mirai/blob/master/LICENSE
+ */
+
+package net.mamoe.mirai.console.internal.util.report
+
+import net.mamoe.mirai.console.MiraiConsole
+import net.mamoe.mirai.console.internal.MiraiConsoleBuildConstants
+import net.mamoe.mirai.console.internal.MiraiConsoleImplementationBridge
+import net.mamoe.mirai.console.internal.data.isDirectory
+import net.mamoe.mirai.console.internal.data.isFile
+import net.mamoe.mirai.console.internal.data.mkdir
+import net.mamoe.mirai.console.internal.plugin.PluginManagerImpl
+import net.mamoe.mirai.console.permission.PermissionService
+import net.mamoe.mirai.console.plugin.PluginManager.INSTANCE.description
+import java.io.*
+import java.lang.management.LockInfo
+import java.lang.management.ManagementFactory
+import java.lang.management.MonitorInfo
+import java.lang.management.ThreadInfo
+import java.nio.file.Files
+import java.nio.file.Path
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
+
+@Suppress("unused")
+internal class ReportGenerator(
+    val pw: PrintWriter
+) : Closeable {
+    companion object {
+        internal val threadMXBean = ManagementFactory.getThreadMXBean()
+        internal val directory by lazy {
+            MiraiConsole.rootPath.resolve("error-reports")
+        }
+
+        fun ThreadInfo.dumpTo(sb: Appendable) {
+            sb.run {
+                append('\"')
+                append(threadName)
+                append("\" Id=")
+                append(threadId.toString())
+                append(" ")
+                append(threadState.toString())
+
+                lockName?.let { append(" on ").append(it) }
+                lockOwnerName?.let { append(" owned by \"").append(it).append("\" Id=").append(lockOwnerId.toString()) }
+                if (isSuspended) {
+                    sb.append(" (suspended)")
+                }
+                if (isInNative) {
+                    sb.append(" (in native)")
+                }
+                sb.append('\n')
+                var i = 0
+                while (i < stackTrace.size) {
+                    val ste: StackTraceElement = stackTrace[i]
+                    sb.append("\tat $ste")
+                    sb.append('\n')
+                    if (i == 0 && lockInfo != null) {
+                        when (threadState) {
+                            Thread.State.BLOCKED -> {
+                                sb.append("\t-  blocked on $lockInfo")
+                                sb.append('\n')
+                            }
+                            Thread.State.WAITING -> {
+                                sb.append("\t-  waiting on $lockInfo")
+                                sb.append('\n')
+                            }
+                            Thread.State.TIMED_WAITING -> {
+                                sb.append("\t-  waiting on $lockInfo")
+                                sb.append('\n')
+                            }
+                            else -> {
+                            }
+                        }
+                    }
+                    for (mi: MonitorInfo in lockedMonitors) {
+                        if (mi.lockedStackDepth == i) {
+                            sb.append("\t-  locked $mi")
+                            sb.append('\n')
+                        }
+                    }
+                    i++
+                }
+                val locks: Array<LockInfo> = lockedSynchronizers
+                if (locks.isNotEmpty()) {
+                    sb.append("\n\tNumber of locked synchronizers = " + locks.size)
+                    sb.append('\n')
+                    for (li: LockInfo in locks) {
+                        sb.append("\t- $li")
+                        sb.append('\n')
+                    }
+                }
+            }
+        }
+
+        fun generateToString(action: ReportGenerator.() -> Unit): String {
+            return StringWriter().apply {
+                ReportGenerator(PrintWriter(this)).use(action)
+            }.toString()
+        }
+
+        fun generateReport(
+            prefix: String = "",
+            action: ReportGenerator.() -> Unit
+        ): Path {
+            val now = System.currentTimeMillis()
+            var counter = 0
+            var outputName = "$prefix$now.log"
+            directory.mkdir()
+            var path: Path
+            do {
+                path = directory.resolve(outputName)
+                if (!path.isFile && !path.isDirectory) {
+                    break
+                }
+                outputName = "$prefix$now-$counter.log"
+                counter++
+            } while (true)
+            ReportGenerator(PrintWriter(BufferedWriter(OutputStreamWriter(Files.newOutputStream(path)))))
+                .use(action)
+            return path
+        }
+    }
+
+    fun renderCurrentThread() {
+        title("Current Thread")
+        renderThread(Thread.currentThread())
+    }
+
+    fun renderThread(thread: Thread) {
+        threadMXBean.getThreadInfo(
+            longArrayOf(thread.id),
+            true,
+            true
+        )[0].dumpTo(pw)
+    }
+
+    fun title(title: String) {
+        pw.append("=============== [ ").append(title).append(" ] ===============")
+        pw.println()
+    }
+
+    fun dumpSystemEnv() {
+        title("System Env")
+
+        pw.println("SysEnv")
+        pw.println()
+        pw.println("```")
+        System.getenv().forEach { (key, value) ->
+            pw.println("$key\t=\t$value")
+        }
+        pw.println("```")
+        pw.println()
+        pw.println("JavaProp")
+        pw.println()
+        pw.println("```")
+        System.getProperties().store(pw, null)
+        pw.println("```")
+        pw.println()
+    }
+
+    fun dumpConsoleEnv() {
+        title("Mirai Console Env")
+        val buildDateFormatted =
+            MiraiConsoleBuildConstants.buildDate.atZone(ZoneId.systemDefault())
+                .format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))
+        pw.append("MiraiConsole v${MiraiConsoleBuildConstants.versionConst}, built on ")
+            .append(buildDateFormatted)
+            .append(".\n")
+        pw.println("FrontEnd:")
+        pw.append("\t").println(MiraiConsoleImplementationBridge.instance.javaClass.name)
+        pw.append("\t").println(MiraiConsoleImplementationBridge.frontEndDescription.render())
+        pw.println()
+        pw.println("Plugins:")
+        PluginManagerImpl.resolvedPlugins.forEach { plugin ->
+            val desc = plugin.description
+            pw.append("\t").append(desc.name).append(" v").append(desc.version.toString()).append(" by ").append(desc.author).println()
+            pw.append("\t\t `-- ").println(plugin.javaClass.name)
+        }
+        pw.println()
+        pw.println("PermissionService: ")
+        pw.append("\t").println(PermissionService.INSTANCE)
+        pw.append("\t\t`- ").println(PermissionService.INSTANCE.javaClass)
+    }
+
+    fun renderException(throwable: Throwable) {
+        throwable.printStackTrace(pw)
+        pw.println()
+    }
+
+    fun hr() {
+        pw.println("====================================================")
+    }
+
+    override fun close() {
+        pw.close()
+    }
+}
\ No newline at end of file