Syncthing fails to execute on macOS 10.15

[NoLooseEnds]

• ran brew update and can still reproduce the problem?
• ran brew doctor, fixed all issues and can still reproduce the problem?
• ran brew gist-logs <formula> (where <formula> is the name of the formula that failed) and included the output link? (Got no output)
• if brew gist-logs didn't work: ran brew config and brew doctor and included their output with your issue?

Syncthing will not execute, apparantly an error with the executable.

zsh: exec format error: /usr/local/opt/syncthing/bin/syncthing

Please see this post over at the syncthing forum: https://forum.syncthing.net/t/syncthing-1-3-0-from-homebrew-on-catalina-fails-with-cannot-execute-binary-file/13852

brew config

HOMEBREW_VERSION: 2.1.14
ORIGIN: https://github.com/Homebrew/brew
HEAD: f1702e5
Last commit: 27 hours ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 84a9806
Core tap last commit: 24 minutes ago
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: --appdir=/Applications
CPU: octa-core 64-bit kabylake
Homebrew Ruby: 2.6.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
Clang: 11.0 build 1100
Git: 2.21.0 => /Applications/Xcode.app/Contents/Developer/usr/bin/git
Curl: 7.64.1 => /usr/bin/curl
Java: 12.0.2
macOS: 10.15-x86_64
CLT: N/A
Xcode: 11.1
XQuartz: 2.7.11 => /opt/X11

brew doctor

Your system is ready to brew.

[fxcoudert]

This looks like this bottle corruption issue, due to Catalina tar: Homebrew/brew#6539

[iwelch]

I do not think this should bug should be closed or is catalina based. see, syncthing 1.2.1 works just fine. only syncthing 1.3.0 is corrupt. this looks more like a bad brew package. oh, and it is still not working. (1.3.0 should be removed asap. just keep 1.2.1 if need be, or fix 1.3.0.)

[iwelch]

I do not think this should bug should be closed or is catalina based. see, syncthing 1.2.1 works just fine. only syncthing 1.3.0 is corrupt. this looks more like a bad brew package. oh, and it is still not working. (1.3.0 should be removed asap. just keep 1.2.1 if need be, or fix 1.3.0.)

until then, my advice is to go to http://syncthing.net, download the macos version, and replace the binary with the original one. it will work then.

[fxcoudert]

See #45616 for further details