Maybe it isn't so fair after all...

I saw 3 of these in an overnight run of all.bash.  The test hangs and gets killed after
6 minutes.

SIGQUIT: quit^M                                                                         
                                                                                
PC=0xf776342e^M                                                                         
                                                                                
^M                                                                                      
                                                                                
^M                                                                                      
                                                                                
goroutine 1 [chan receive]:^M                                                           
                                                                                
testing.RunTests(0x8270818, 0x84a53e0, 0x4f, 0x4f, 0x1)^M                               
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/testing/testing.go:472 +0x79d^M                                                                          
testing.Main(0x8270818, 0x84a53e0, 0x4f, 0x4f, 0x84a6800, ...)^M                        
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/testing/testing.go:403 +0x6b^M                                                                           
main.main()^M                                                                           
                                                                                
        /tmp/go-build192147761/runtime/_test/_testmain.go:513 +0x83^M                                                                                                    
^M                                                                                      
                                                                                
goroutine 60 [finalizer wait]:^M                                                        
                                                                                
runtime.park(0x8055240, 0x84a78b8, 0x84a668e)^M                                         
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc.c:1341 +0x65^M                                                                              
runfinq()^M                                                                             
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/mgc0.c:2486 +0x7b^M                                                                              
runtime.goexit()^M                                                                      
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc.c:1393^M                                                                                    
^M                                                                                      
                                                                                
goroutine 160309 [runnable]:^M                                                          
                                                                                
runtime_test.TestTimerFairness(0x188ef6c0)^M                                            
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc_test.go:157 +0x173^M                                                                        
testing.tRunner(0x188ef6c0, 0x84a56e0)^M                                                
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/testing/testing.go:391 +0x88^M                                                                           
created by testing.RunTests^M                                                           
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/testing/testing.go:471 +0x782^M                                                                          
^M                                                                                      
                                                                                
goroutine 160311 [running]:^M                                                           
                                                                                
        goroutine running on other thread; stack unavailable^M                                                                                                           
created by runtime_test.TestTimerFairness^M                                             
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc_test.go:152 +0xca^M                                                                         
^M                                                                                      
                                                                                
goroutine 160310 [running]:^M                                                           
                                                                                
        goroutine running on other thread; stack unavailable^M                                                                                                           
created by runtime_test.TestTimerFairness^M                                             
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc_test.go:152 +0xca^M                                                                         

eax     0xf0^M                                                                          
                                                                                
ebx     0x84a97b4^M                                                                     
                                                                                
ecx     0x0^M                                                                           
                                                                                
edx     0x0^M                                                                           
                                                                                
edi     0x0^M                                                                           
                                                                                
esi     0x0^M                                                                           
                                                                                
ebp     0x0^M                                                                           
                                                                                
esp     0xffa7b5f4^M                                                                    
                                                                                
eip     0xf776342e^M                                                                    
                                                                                
eflags  0x296^M                                                                         
                                                                                
cs      0x23^M                                                                          
                                                                                
fs      0x0^M                                                                           
                                                                                
gs      0x3f^M                                                                          
                                                                                
*** Test killed with quit: ran too long (6m0s).^M                                       
                                                                                
FAIL    runtime 360.051s^M                                                              
                                                                                



SIGQUIT: quit^M                                                                         
                                                                                
PC=0xf77d242e^M                                                                         
                                                                                
^M                                                                                      
                                                                                
^M                                                                                      
                                                                                
goroutine 1 [chan receive]:^M                                                           
                                                                                
testing.RunTests(0x8270818, 0x84a53e0, 0x4f, 0x4f, 0x1)^M                               
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/testing/testing.go:472 +0x79d^M                                                                          
testing.Main(0x8270818, 0x84a53e0, 0x4f, 0x4f, 0x84a6800, ...)^M                        
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/testing/testing.go:403 +0x6b^M                                                                           
main.main()^M                                                                           
                                                                                
        /tmp/go-build861571265/runtime/_test/_testmain.go:513 +0x83^M                                                                                                    
^M                                                                                      
                                                                                
goroutine 61 [finalizer wait]:^M                                                        
                                                                                
runtime.park(0x8055240, 0x84a78b8, 0x84a668e)^M                                         
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc.c:1341 +0x65^M                                                                              
runfinq()^M                                                                             
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/mgc0.c:2486 +0x7b^M                                                                              
runtime.goexit()^M                                                                      
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc.c:1393^M                                                                                    
^M                                                                                      
                                                                                
goroutine 240491 [running]:^M                                                           
                                                                                
        goroutine running on other thread; stack unavailable^M                                                                                                           
created by runtime_test.TestTimerFairness^M                                             
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc_test.go:152 +0xca^M                                                                         
^M                                                                                      
                                                                                
goroutine 240494 [running]:^M                                                           
                                                                                
        goroutine running on other thread; stack unavailable^M                                                                                                           
created by runtime_test.TestTimerFairness2^M                                            
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc_test.go:183 +0xca^M                                                                         
^M                                                                                      
                                                                                
goroutine 240492 [running]:^M                                                           
                                                                                
        goroutine running on other thread; stack unavailable^M                                                                                                           
created by runtime_test.TestTimerFairness^M                                             
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc_test.go:152 +0xca^M                                                                         
^M                                                                                      
                                                                                
goroutine 240496 [running]:^M                                                           
                                                                                
        goroutine running on other thread; stack unavailable^M                                                                                                           
^M                                                                                      
                                                                                
goroutine 240493 [chan receive]:^M                                                      
                                                                                
runtime_test.TestTimerFairness2(0x187476c0)^M                                           
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/runtime/proc_test.go:186 +0x106^M                                                                        
testing.tRunner(0x187476c0, 0x84a56ec)^M                                                
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/testing/testing.go:391 +0x88^M                                                                           
created by testing.RunTests^M                                                           
                                                                                
        /usr/local/google/home/khr/sandbox/go-issue7083/src/pkg/testing/testing.go:471 +0x782^M                                                                          

eax     0xf0^M                                                                          
                                                                                
ebx     0x84a97b4^M                                                                     
                                                                                
ecx     0x0^M                                                                           
                                                                                
edx     0x0^M                                                                           
                                                                                
edi     0x0^M                                                                           
                                                                                
esi     0x0^M                                                                           
                                                                                
ebp     0x0^M                                                                           
                                                                                
esp     0xffaa7034^M                                                                    
                                                                                
eip     0xf77d242e^M                                                                    
                                                                                
eflags  0x296^M                                                                         
                                                                                
cs      0x23^M                                                                          
                                                                                
fs      0x0^M                                                                           
                                                                                
gs      0x3f^M                                                                          
                                                                                
*** Test killed with quit: ran too long (6m0s).^M                                       
                                                                                
FAIL    runtime 360.056s^M