shards @0.9.0 build failure: Errno is not a subclass of Exception

[PeterMozesMerl]

During the last year, I could almost never install shards or crystal with MacPorts. A few days ago, the installation worked on a laptop with Catalina. Unfortunately, it still doesn’t work on Mojave and Big Sur. I’m not sure it’s related to the macOS version.

$ sudo port install shards
Password:
--->  Computing dependencies for shards
--->  Cleaning shards
--->  Scanning binaries for linking errors
--->  Found 1 broken file, matching files to ports
--->  Found 1 broken port, determining rebuild order
You can always run 'port rev-upgrade' again to fix errors.
The following ports will be rebuilt: shards @0.9.0
Continue? [Y/n]: y
--->  Computing dependencies for shards
--->  Cleaning shards
--->  Scanning binaries for linking errors
--->  Found 1 broken file, matching files to ports
--->  Found 1 broken port, determining rebuild order
--->  Rebuilding in order
     shards @0.9.0
--->  Computing dependencies for shards
--->  Fetching distfiles for shards
--->  Verifying checksums for shards
--->  Extracting shards
--->  Configuring shards
--->  Building shards
Error: Failed to build shards: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/main.log for details.
Error: rev-upgrade failed: Error rebuilding shards
Error: Follow https://guide.macports.org/#project.tickets to report a bug.

:notice:extract --->  Extracting shards
:debug:extract Executing org.macports.extract (shards)
:info:extract --->  Extracting shards-0.9.0.tar.gz
:debug:extract setting option extract.args to '/opt/local/var/macports/distfiles/shards/shards-0.9.0.tar.gz'
:debug:extract Environment:
:debug:extract CC_PRINT_OPTIONS='YES'
:debug:extract CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work/.CC_PRINT_OPTIONS'
:debug:extract CPATH='/opt/local/include'
:debug:extract DEVELOPER_DIR='/Library/Developer/CommandLineTools'
:debug:extract LIBRARY_PATH='/opt/local/lib'
:debug:extract MACOSX_DEPLOYMENT_TARGET='10.14'
:debug:extract SDKROOT='/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk'
:info:extract Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work" && /usr/bin/gzip -dc '/opt/local/var/macports/distfiles/shards/shards-0.9.0.tar.gz' | /usr/bin/tar -xf -
:debug:extract system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work" && /usr/bin/gzip -dc '/opt/local/var/macports/distfiles/shards/shards-0.9.0.tar.gz' | /usr/bin/tar -xf -
:debug:extract euid/egid changed to: 0/0
:debug:extract chowned /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work to macports
:debug:extract euid/egid changed to: 502/501
:debug:extract Symlink: /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work/shards-0.9.0 -> crystal-lang-shards-81ea693
:debug:extract Executing proc-post-org.macports.extract-extract-0
:debug:extract Privilege de-escalation not attempted as not running as root.
:debug:patch patch phase started at Tue Jan 26 17:00:16 CET 2021
:debug:patch Executing org.macports.patch (shards)
:debug:patch Privilege de-escalation not attempted as not running as root.
:debug:configure configure phase started at Tue Jan 26 17:00:16 CET 2021
:notice:configure --->  Configuring shards
:debug:configure Preferred compilers: clang macports-clang-9.0 macports-clang-8.0 macports-clang-7.0 macports-clang-6.0 macports-clang-5.0
:debug:configure Using compiler 'Xcode Clang'
:debug:configure Executing org.macports.configure (shards)
:debug:configure Privilege de-escalation not attempted as not running as root.
:debug:build build phase started at Tue Jan 26 17:00:16 CET 2021
:notice:build --->  Building shards
:debug:build Executing org.macports.build (shards)
:debug:build Environment:
:debug:build CC_PRINT_OPTIONS='YES'
:debug:build CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work/.CC_PRINT_OPTIONS'
:debug:build CPATH='/opt/local/include'
:debug:build DEVELOPER_DIR='/Library/Developer/CommandLineTools'
:debug:build LIBRARY_PATH='/opt/local/lib'
:debug:build MACOSX_DEPLOYMENT_TARGET='10.14'
:debug:build SDKROOT='/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk'
:info:build Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work/shards-0.9.0" && /usr/bin/make -j16 -w all CRFLAGS=--release
:debug:build system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work/shards-0.9.0" && /usr/bin/make -j16 -w all CRFLAGS=--release
:info:build make: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work/crystal-lang-shards-81ea693'
:info:build crystal build src/shards.cr -o bin/shards --release
:info:build ESC[2mShowing last frame. Use --error-trace for full trace.ESC[0m
:info:build In ESC[4msrc/resolvers/path.cr:46:22ESC[0m
:info:build ESC[2m 46 | ESC[0mESC[1mrescue errno : ErrnoESC[0m
:info:build                      ESC[32;1m^ESC[0m
:info:build ESC[33;1mError: Errno is not a subclass of ExceptionESC[0m
:info:build make: *** [bin/shards] Error 1
:info:build make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work/crystal-lang-shards-81ea693'
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/work/shards-0.9.0" && /usr/bin/make -j16 -w all CRFLAGS=--release
:info:build Exit code: 2
:error:build Failed to build shards: command execution failed
:debug:build Error code: CHILDSTATUS 11133 2
:debug:build Backtrace: command execution failed
:debug:build     while executing
:debug:build "system {*}$notty {*}$nice $fullcmdstring"
:debug:build     invoked from within
:debug:build "command_exec build"
:debug:build     (procedure "portbuild::build_main" line 8)
:debug:build     invoked from within
:debug:build "$procedure $targetname"
:error:build See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_shards/shards/main.log for details.

I tried:

• Reinstalling Command Line Tools
• Removing the broken shards install, running port uninstall leaves, and starting over
• Asking the Programmer Spirit to help me