Preserve fuzzer fatal messages in raw logs

Author: Felixoid

docker/test/fuzzer/run-fuzzer.sh

@@ -379,8 +379,11 @@ EOF
     elif [ "$server_died" == 1 ]
     then
         # The server has died.
-        if ! rg --text -o 'Received signal.*|Logical error.*|Assertion.*failed|Failed assertion.*|.*runtime error: .*|.*is located.*|(SUMMARY|ERROR): [a-zA-Z]+Sanitizer:.*|.*_LIBCPP_ASSERT.*|.*Child process was terminated by signal 9.*' server.log > description.txt
+        if rg --text -o 'Received signal.*|Logical error.*|Assertion.*failed|Failed assertion.*|.*runtime error: .*|.*is located.*|(SUMMARY|ERROR): [a-zA-Z]+Sanitizer:.*|.*_LIBCPP_ASSERT.*|.*Child process was terminated by signal 9.*' server.log > description.txt
         then
+            # Save the stack trace of the server to the description file and preserve in raw text output.
+            rg --text '<Fatal>' server.log >> description.txt ||:
+        else
             echo "Lost connection to server. See the logs." > description.txt
         fi