Disable SecurityManager when IDEA is active

Otherwise, we have to keep our coroutine debugger disabled all the time: it attempts to read system property and fails on start

Author: qwwdfsad

kotlinx-coroutines-core/build.gradle

@@ -177,7 +177,9 @@ jvmTest {
     minHeapSize = '1g'
     maxHeapSize = '1g'
     enableAssertions = true
-    systemProperty 'java.security.manager', 'kotlinx.coroutines.TestSecurityManager'
+    if (!Idea.active) { // Workaround for KT-42671
+        systemProperty 'java.security.manager', 'kotlinx.coroutines.TestSecurityManager'
+    }
     // 'stress' is required to be able to run all subpackage tests like ":jvmTests --tests "*channels*" -Pstress=true"
     if (!Idea.active && rootProject.properties['stress'] == null) {
         exclude '**/*StressTest.*'