I'm trying to characterize the race-detector/tsan corruption
bugs found in https://github.com/golang/go/issues/74019,
on the latest pre-release of go1.25 (at 
b062eb46e8e76ad39029d0c1b13e4eb81c692c20
which is tagged as "*release-branch.go1.25").*

I tried to follow the Go src/runtime/race/README instructions
to update the race detector to the latest in the llvm repo, since it
is 20 months old, and maybe there have been fixes applied( probably
wishful thinking, but worth a quick try...), but I'm not having any luck 
with "racebuild":

*jaten@rog **/usr/local/dev-go/go/src/runtime/race **(go1.25-goj) **$* 
*racebuild 
-goroot /u**sr/local/dev-go/go -platforms darwin/amd64v1  -rev 
46e3ec0244c4d75a57cd635a28a9d5cb**aee67c3d*

2025/07/07 08:12:24 using Go revision: 
b062eb46e8e76ad39029d0c1b13e4eb81c692c20

2025/07/07 08:12:24 darwin/amd64v1: gomote [create -status=false 
gotip-darwin-amd64_14]

Please visit https://www.google.com/device in your browser and enter 
verification code:

XXX-XXX-XXXX

# Error running create: failed to create buildlet (1): rpc error: code = 
PermissionDenied desc = unexpected HTTP status code received from server: 
403 (Forbidden); transport: received unexpected content-type "text/html; 
charset=UTF-8"

2025/07/07 08:13:34 darwin/amd64v1: gomote [create -status=false 
gotip-darwin-amd64_14] failed:

Please visit https://www.google.com/device in your browser and enter 
verification code:

XXX-XXX-XXXX

# Error running create: failed to create buildlet (1): rpc error: code = 
PermissionDenied desc = unexpected HTTP status code received from server: 
403 (Forbidden); transport: received unexpected content-type "text/html; 
charset=UTF-8"

2025/07/07 08:13:34 darwin/amd64v1: instance creation failed, retrying

2025/07/07 08:13:34 darwin/amd64v1: gomote [create -status=false 
gotip-darwin-amd64_14]

# Error running create: failed to create buildlet (1): rpc error: code = 
Permission\

Denied desc = unexpected HTTP status code received from server: 403 
(Forbidden); tr\

ansport: received unexpected content-type "text/html; charset=UTF-8"

2025/07/07 08:13:35 darwin/amd64v1: gomote [create -status=false 
gotip-darwin-amd64_14] failed:

# Error running create: failed to create buildlet (1): rpc error: code = 
Permission\

Denied desc = unexpected HTTP status code received from server: 403 
(Forbidden); tr\

ansport: received unexpected content-type "text/html; charset=UTF-8"

2025/07/07 08:13:35 darwin/amd64v1: instance creation failed, retrying

2025/07/07 08:13:35 darwin/amd64v1: gomote [create -status=false 
gotip-darwin-amd64_14]

... lots more of the same, after signing into my gmail...

Is it possible to do this locally and not with the Go distributed build 
system?

Thanks!

Jason

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