Homebrew install fails about swaggen HOT 6 CLOSED

brew install swaggen --verbose

> brew install swaggen --verbose
==> Installing SwagGen from yonaskolb/swaggen
/usr/bin/sandbox-exec -f /tmp/homebrew20180531-72568-5x91qm.sb nice /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby -W0 -I /usr/local/Homebrew/Library/Homebrew -- /usr/local/Homebrew/Library/Homebrew/build.rb /usr/local/Homebrew/Library/Taps/yonaskolb/homebrew-swaggen/Formula/SwagGen.rb --verbose
==> Downloading https://github.com/yonaskolb/SwagGen/archive/2.1.0.tar.gz
Already downloaded: /Users/erwin/Library/Caches/Homebrew/SwagGen-2.1.0.tar.gz
==> Verifying SwagGen-2.1.0.tar.gz checksum
tar xzf /Users/erwin/Library/Caches/Homebrew/SwagGen-2.1.0.tar.gz
==> make install PREFIX=/usr/local/Cellar/SwagGen/2.1.0
swift build --disable-sandbox -c release -Xswiftc -static-stdlib
Compile CYaml src/scanner.c
Compile CYaml src/writer.c
Compile CYaml src/emitter.c
Compile CYaml src/reader.c
Compile CYaml src/api.c
Compile CYaml src/parser.c
Compile Swift Module 'SwiftCLI' (20 sources)
Compile Swift Module 'Spectre' (8 sources)
/Applications/Apps/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2/module.modulemap:1:8: error: redefinition of module 'libxml2'
module libxml2 [system] [extern_c] {
       ^
/usr/include/libxml2/module.modulemap:1:8: note: previously defined here
module libxml2 [system] [extern_c] {
       ^
1 error generated.
/Applications/Apps/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2/module.modulemap:1:8: error: redefinition of module 'libxml2'
module libxml2 [system] [extern_c] {
       ^
/usr/include/libxml2/module.modulemap:1:8: note: previously defined here
module libxml2 [system] [extern_c] {
       ^
1 error generated.
/Applications/Apps/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2/module.modulemap:1:8: error: redefinition of module 'libxml2'
module libxml2 [system] [extern_c] {
       ^
/usr/include/libxml2/module.modulemap:1:8: note: previously defined here
module libxml2 [system] [extern_c] {
       ^
1 error generated.
/Applications/Apps/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2/module.modulemap:1:8: error: redefinition of module 'libxml2'
module libxml2 [system] [extern_c] {
       ^
/usr/include/libxml2/module.modulemap:1:8: note: previously defined here
module libxml2 [system] [extern_c] {
       ^
/Applications/Apps/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2/module.modulemap:1:8: error: redefinition of module 'libxml2'
module libxml2 [system] [extern_c] {
       ^
/usr/include/libxml2/module.modulemap:1:8: note: previously defined here
module libxml2 [system] [extern_c] {
       ^
/Applications/Apps/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2/module.modulemap:1:8: error: redefinition of module 'libxml2'
module libxml2 [system] [extern_c] {
       ^
/usr/include/libxml2/module.modulemap:1:8: note: previously defined here
module libxml2 [system] [extern_c] {
       ^
error: terminated(1): /Applications/Apps/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-build-tool -f /private/tmp/SwagGen-20180531-72570-jgx2du/SwagGen-2.1.0/.build/release.yaml main output:
    

Fetching https://github.com/kylef/PathKit.git
Fetching https://github.com/onevcat/Rainbow.git
Fetching https://github.com/kylef/Spectre.git
Fetching https://github.com/jpsim/Yams.git
Fetching https://github.com/yonaskolb/JSONUtilities.git
Fetching https://github.com/jakeheis/SwiftCLI
Fetching https://github.com/yonaskolb/Stencil.git
Cloning https://github.com/kylef/PathKit.git
Resolving https://github.com/kylef/PathKit.git at 0.8.0
Cloning https://github.com/onevcat/Rainbow.git
Resolving https://github.com/onevcat/Rainbow.git at 2.1.0
Cloning https://github.com/kylef/Spectre.git
Resolving https://github.com/kylef/Spectre.git at 0.7.2
Cloning https://github.com/jpsim/Yams.git
Resolving https://github.com/jpsim/Yams.git at 0.5.0
Cloning https://github.com/yonaskolb/JSONUtilities.git
Resolving https://github.com/yonaskolb/JSONUtilities.git at 3.3.8
Cloning https://github.com/jakeheis/SwiftCLI
Resolving https://github.com/jakeheis/SwiftCLI at 5.0.0
Cloning https://github.com/yonaskolb/Stencil.git
Resolving https://github.com/yonaskolb/Stencil.git at 0.9.3
make: *** [build] Error 1

==> Formula
Tap: yonaskolb/swaggen
Path: /usr/local/Homebrew/Library/Taps/yonaskolb/homebrew-swaggen/Formula/SwagGen.rb
==> Configuration
HOMEBREW_VERSION: 1.6.6
ORIGIN: https://github.com/Homebrew/brew
HEAD: e4c02fafdaef5676cf40dd6d16e74976cf54b265
Last commit: 6 days ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 15883bdf7b7143da80587921fa0d1b857718f531
Core tap last commit: 4 hours ago
HOMEBREW_PREFIX: /usr/local
HOMEBREW_ENABLE_AUTO_UPDATE_MIGRATION: 1
CPU: octa-core 64-bit kabylake
Homebrew Ruby: 2.3.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby
Clang: 9.1 build 902
Git: 2.15.1 => /Applications/Apps/Xcode.app/Contents/Developer/usr/bin/git
Curl: 7.54.0 => /usr/bin/curl
Java: N/A
macOS: 10.13.4-x86_64
CLT: 9.3.0.0.1.1521514116
Xcode: 9.4 => /Applications/Apps/Xcode.app/Contents/Developer
XQuartz: N/A
==> ENV
HOMEBREW_CC: clang
HOMEBREW_CXX: clang++
MAKEFLAGS: -j8
CMAKE_PREFIX_PATH: /usr/local
CMAKE_INCLUDE_PATH: /usr/include/libxml2:/System/Library/Frameworks/OpenGL.framework/Versions/Current/Headers
CMAKE_LIBRARY_PATH: /System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries
PKG_CONFIG_LIBDIR: /usr/lib/pkgconfig:/usr/local/Homebrew/Library/Homebrew/os/mac/pkgconfig/10.13
PATH: /usr/local/Homebrew/Library/Homebrew/shims/super:/usr/bin:/bin:/usr/sbin:/sbin

Error: yonaskolb/swaggen/SwagGen 2.1.0 did not build
Logs:
     /Users/erwin/Library/Logs/Homebrew/SwagGen/01.make
     /Users/erwin/Library/Logs/Homebrew/SwagGen/00.options.out
     /Users/erwin/Library/Logs/Homebrew/SwagGen/01.make.cc
If reporting this issue please do so to (not Homebrew/brew or Homebrew/core):
yonaskolb/swaggen

/usr/local/Homebrew/Library/Homebrew/utils/github.rb:222:in `raise_api_error': curl failed!   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current (GitHub::Error)
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (22) The requested URL returned error: 422 Unprocessable Entity
curl: (3) <url> malformed
	from /usr/local/Homebrew/Library/Homebrew/utils/github.rb:180:in `open_api'
	from /usr/local/Homebrew/Library/Homebrew/utils/github.rb:294:in `search'
	from /usr/local/Homebrew/Library/Homebrew/utils/github.rb:227:in `search_issues'
	from /usr/local/Homebrew/Library/Homebrew/utils/github.rb:240:in `issues_for_formula'
	from /usr/local/Homebrew/Library/Homebrew/exceptions.rb:368:in `fetch_issues'
	from /usr/local/Homebrew/Library/Homebrew/exceptions.rb:364:in `issues'
	from /usr/local/Homebrew/Library/Homebrew/exceptions.rb:418:in `dump'
	from /usr/local/Homebrew/Library/Homebrew/brew.rb:133:in `rescue in <main>'
	from /usr/local/Homebrew/Library/Homebrew/brew.rb:25:in `<main>'

> swift
Welcome to Apple Swift version 4.1.2 (swiftlang-902.0.54 clang-902.0.39.2). Type :help for assistance.
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