SG crashes on launch, built on macOS 10.12.4 / Xcode 8.3

[snej]

I'm trying to build top-of-tree SG on my MBP. I did a clean checkout using the boostrap.sh script as described in the build instructions. The build script succeeded and the binary is in the expected place, but it crashes and burns immediately:

$  godeps/bin/sync_gateway
zsh: killed     godeps/bin/sync_gateway
$  lldb godeps/bin/sync_gateway
(lldb) target create "godeps/bin/sync_gateway"
Current executable set to 'godeps/bin/sync_gateway' (x86_64).
(lldb) run
error: error: ::posix_spawnp ( pid => 5727, path = '/Couchbase/sync_gateway/godeps/bin/sync_gateway', file_actions = 0x7fff50f3f628, attr = 0x7fff50f3f638, argv = 0x7f8ac971bbe0, envp = 0x7f8ac972d6f0 ) err = Cannot allocate memory (0x0000000c)
(lldb) bt
error: invalid process
(lldb)

I've been developing for OS X since 2000 and I've never seen anything like that! It looks like the binary is broken enough that it can't even be launched into a process.

@tleyden suggested I build and run sgload, just to make sure my Go toolchain works. I did, and it starts up, so that doesn't seem to be the problem.

• MacBook Pro
• macOS 10.12.4 beta (16E192b)
• go version go1.8 darwin/amd64 (installed today via homebrew)
• Xcode 8.3; clang -v reports "Apple LLVM version 8.1.0 (clang-802.0.38)"

[ajres]

macOS 10.12.1, golang 1.8, xcode 8.1, I just upgraded to golang 1.8. SG 1.4 compiles and runs without error.

[sethrosetter]

I tried on macOS 10.12.3, xcode 8.2.1, golang 1.8.

Works for me

~/sync_gateway » godeps/bin/sync_gateway
2017-03-24T12:02:39.599-07:00 ==== Couchbase Sync Gateway/HEAD(nobranch)(9480da7) ====
2017-03-24T12:02:39.599-07:00 Configured process to allow 5000 open file descriptors
2017-03-24T12:02:39.599-07:00 Opening db /sync_gateway as bucket "sync_gateway", pool "default", server <walrus:>
2017-03-24T12:02:39.599-07:00 Opening Walrus database sync_gateway on <walrus:>
2017-03-24T12:02:39.600-07:00 Using default sync function 'channel(doc.channels)' for database "sync_gateway"
2017-03-24T12:02:39.600-07:00     Reset guest user to config
2017-03-24T12:02:39.600-07:00 Starting profile server on
2017-03-24T12:02:39.600-07:00 Starting admin server on 127.0.0.1:4985
2017-03-24T12:02:39.605-07:00 Starting server on localhost:4984 ...

[snej]

You can download Xcode 8.3 from Apple's developer site. It says "beta 5" but I believe it's a final candidate because the app itself doesn't have the beta badge on its icon and its version string just says "8.3".

When you launch it, it will ask to install developer tools. If you didn't replace the existing Xcode with this one, you may also need to use the xcode_select tool to point the command-line toolchain at the actual binaries inside the new Xcode.

[dmaclach]

This happened with Xcode 8.3 final on macOS 10.12.3 today on a different piece of code.

[snej]

Thanks for filing the issue against Go, @dmaclach! From that thread, there's a workaround: "adding -ldflags -s during the go build phase."

Xcode 8.3 betas have been around for months, so I'm surprised that no one in the Go community ran into this issue before I did...

[djpongh]

FYI - looks like Xcode 8.3 final is out (8E162). @jens not sure if that fixes the issue...

[dmaclach]

It does not :(