port command "freezing" after xcodebuild

[lbschenkel (Leonardo Brondani Schenkel)]

Steps to reproduce:

1. Clone the branch referenced by ​https://github.com/macports/macports-ports/pull/486
2. cd emulators/free42
3. port -d destroot

Observed behaviour:

1. xcodebuild will be invoked, will print ** BUILD SUCCEEDED ** and exit
2. The process tclsh8.5 /opt/local/bin/port will be in a "frozen" state and unresponsive to Ctrl+C
3. After approximate 3 minutes, the process will "unfreeze" by itself
4. xcodebuild will be invoked again, behaviours 1-3 will repeat

This is 100% reproducible in my machine. Every time port freezes, xcodebuild already exited. This can be confirmed by manually invoking it in the work/free42-macports-2.0.2/mac directory:

/usr/bin/xcodebuild  -alltargets -configuration 'Release Decimal' build INSTALL_PATH=/Applications/MacPorts OBJROOT=build/ SYMROOT=build/ MACOSX_DEPLOYMENT_TARGET=10.12 ARCHS=i386 SDKROOT="" GCC_VERSION=com.apple.compilers.llvm.clang.1_0 CLANG_CXX_LIBRARY="libc++"

The command above always immediately returns to the prompt when finished.

I have been unable to figure out why this is happening. I'm attaching a debug log from my machine.

[raimue (Rainer Müller)]

See also: ​https://lists.macports.org/pipermail/macports-dev/2017-May/035812.html

This has been reported multiple times before (#49647, #45609, ​macports-users), but we were unable to detect the cause and it seems like it also happens outside of MacPorts, so it might be a general problem with xcodebuild.

The recommend solution is to reboot your Mac.

[lbschenkel (Leonardo Brondani Schenkel)]

I'm the author of the linked post. :-)