Fix stacktrace in the Json output

sonar-scanner-engine/src/main/java/org/sonar/scanner/bootstrap/ScannerLogbackEncoder.java

@@ -24,6 +24,7 @@ import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.classic.spi.IThrowableProxy;
 import ch.qos.logback.core.CoreConstants;
 import ch.qos.logback.core.encoder.EncoderBase;
+import java.util.List;
 import org.apache.commons.text.StringEscapeUtils;
 
 import static ch.qos.logback.core.CoreConstants.COMMA_CHAR;
@@ -41,6 +42,11 @@ public class ScannerLogbackEncoder extends EncoderBase<ILoggingEvent> {
 
   private final ThrowableProxyConverter tpc = new ThrowableProxyConverter();
 
+  public ScannerLogbackEncoder() {
+    tpc.setOptionList(List.of("full"));
+    tpc.start();
+  }
+
   @Override
   public byte[] headerBytes() {
     return EMPTY_BYTES;

sonar-scanner-engine/src/test/java/org/sonar/scanner/bootstrap/ScannerLogbackEncoderTest.java

@@ -30,9 +30,9 @@ import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
 class ScannerLogbackEncoderTest {
-  
+
   ScannerLogbackEncoder underTest = new ScannerLogbackEncoder();
-  
+
   @Test
   void no_headers_and_footers() {
     assertThat(underTest.headerBytes()).isEmpty();
@@ -70,7 +70,9 @@ class ScannerLogbackEncoderTest {
 
     var bytes = underTest.encode(logEvent);
 
-    assertThat(new String(bytes, StandardCharsets.UTF_8)).isEqualTo("{\"level\":\"DEBUG\",\"message\":\"message\",\"stacktrace\":\"java.lang.IllegalArgumentException: foo\\n\"}\n");
+    assertThat(new String(bytes, StandardCharsets.UTF_8))
+      .startsWith(
+        "{\"level\":\"DEBUG\",\"message\":\"message\",\"stacktrace\":\"java.lang.IllegalArgumentException: foo\\n\\tat org.sonar.scanner.bootstrap.ScannerLogbackEncoderTest.should_encode_with_stacktrace");
   }
 
-}
+}