Can anyone replicate this error?

DebugLog.txt

45.0 APEX_CODE,FINEST;APEX_PROFILING,FINEST;CALLOUT,FINEST;DB,FINEST;NBA,INFO;SYSTEM,FINEST;VALIDATION,FINEST;VISUALFORCE,FINEST;WAVE,INFO;WORKFLOW,FINEST
Execute Anonymous: class kkkkkkk {
Execute Anonymous:     void method1() { }
Execute Anonymous: }
Execute Anonymous: new kkkkkkk().method1();
00:25:56.1 (1554571)|USER_INFO|[EXTERNAL]|00550000000wTdS|<redacted>|(GMT-04:00) Eastern Daylight Time (America/Indiana/Indianapolis)|GMT-04:00
00:25:56.1 (1597258)|EXECUTION_STARTED
00:25:56.1 (1605985)|CODE_UNIT_STARTED|[EXTERNAL]|execute_anonymous_apex
00:25:56.1 (1913868)|HEAP_ALLOCATE|[72]|Bytes:3
00:25:56.1 (1984554)|HEAP_ALLOCATE|[77]|Bytes:152
00:25:56.1 (2000247)|HEAP_ALLOCATE|[342]|Bytes:408
00:25:56.1 (2014198)|HEAP_ALLOCATE|[355]|Bytes:408
00:25:56.1 (2026467)|HEAP_ALLOCATE|[467]|Bytes:48
00:25:56.1 (2054024)|HEAP_ALLOCATE|[139]|Bytes:6
00:25:56.1 (2086571)|HEAP_ALLOCATE|[EXTERNAL]|Bytes:1
00:25:56.1 (2212903)|STATEMENT_EXECUTE|[1]
00:25:56.1 (2216401)|STATEMENT_EXECUTE|[4]
00:25:56.1 (2409057)|HEAP_ALLOCATE|[4]|Bytes:1
00:25:56.1 (2429325)|HEAP_ALLOCATE|[4]|Bytes:4
00:25:56.1 (2502108)|HEAP_ALLOCATE|[50]|Bytes:5
00:25:56.1 (2525634)|HEAP_ALLOCATE|[56]|Bytes:5
00:25:56.1 (2534098)|HEAP_ALLOCATE|[64]|Bytes:7
00:25:56.1 (2553841)|SYSTEM_MODE_ENTER|false
00:25:56.1 (2591621)|HEAP_ALLOCATE|[4]|Bytes:5
00:25:56.1 (2658887)|SYSTEM_CONSTRUCTOR_ENTRY|[4]|<init>()
00:25:56.1 (2713100)|VARIABLE_SCOPE_BEGIN|[1]|this|kkkkkkk|true|false
00:25:56.1 (2803297)|VARIABLE_ASSIGNMENT|[1]|this|{}|0x76f2b670
00:25:56.1 (2816117)|HEAP_ALLOCATE|[EXTERNAL]|Bytes:6
00:25:56.1 (2867041)|STATEMENT_EXECUTE|[1]
00:25:56.1 (2893455)|SYSTEM_CONSTRUCTOR_EXIT|[4]|<init>()
00:25:56.1 (2914902)|SYSTEM_MODE_EXIT|false
00:25:56.1 (2941285)|SYSTEM_MODE_ENTER|false
00:25:56.1 (2966365)|HEAP_ALLOCATE|[4]|Bytes:5
00:25:56.1 (3194911)|SYSTEM_MODE_EXIT|false
00:25:56.1 (3258463)|FATAL_ERROR|Internal Salesforce.com Error
00:25:56.3 (3283342)|CUMULATIVE_LIMIT_USAGE
00:25:56.3 (3283342)|LIMIT_USAGE_FOR_NS|(default)|
  Number of SOQL queries: 0 out of 100
  Number of query rows: 0 out of 50000
  Number of SOSL queries: 0 out of 20
  Number of DML statements: 0 out of 150
  Number of DML rows: 0 out of 10000
  Maximum CPU time: 0 out of 10000
  Maximum heap size: 0 out of 6000000
  Number of callouts: 0 out of 100
  Number of Email Invocations: 0 out of 10
  Number of future calls: 0 out of 50
  Number of queueable jobs added to the queue: 0 out of 50
  Number of Mobile Apex push calls: 0 out of 10

00:25:56.3 (3283342)|TOTAL_EMAIL_RECIPIENTS_QUEUED|0
00:25:56.3 (3283342)|CUMULATIVE_LIMIT_USAGE_END

00:25:56.1 (3475447)|CODE_UNIT_FINISHED|execute_anonymous_apex
00:25:56.1 (4393343)|EXECUTION_FINISHED
00:25:56.17 (17372899)|CUMULATIVE_PROFILING_BEGIN
00:25:56.17 (17372899)|CUMULATIVE_PROFILING|No profiling information for SOQL operations
00:25:56.17 (17372899)|CUMULATIVE_PROFILING|No profiling information for SOSL operations
00:25:56.17 (17372899)|CUMULATIVE_PROFILING|No profiling information for DML operations
00:25:56.17 (17372899)|CUMULATIVE_PROFILING|method invocations|
External entry point: public static void execute(): executed 1 time in 1 ms
AnonymousBlock: line 4, column 1: global kkkkkkk(): executed 1 time in 1 ms

00:25:56.17 (17372899)|CUMULATIVE_PROFILING_END

executeAnonymousScript.java

public class kkkkkkk {
    public void method1() {
    }
}
new kkkkkkk().method1();

Notes.txt

Any class name with 1-7 characters results in Internal Server Error. Any class name with 8 or more characters work correctly. Only occurs in one org. All other orgs I've tested so far run the code correctly with any class name.