[Bug 244408] lang/gjs: Fails to build when clang has assertions enabled

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244408

            Bug ID: 244408
           Summary: lang/gjs: Fails to build when clang has assertions
                    enabled
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: gnome at FreeBSD.org
          Reporter: dim at FreeBSD.org
            Blocks: 244251
          Assignee: gnome at FreeBSD.org
             Flags: maintainer-feedback?(gnome at FreeBSD.org)

As reported in bug 244251, with clang 10.0.0 the lang/gjs port fails to build
with a clang assertion, if such assertions are enabled (they are only in
FreeBSD head, not in stable or release branches):

Assertion failed: (!isValueDependent() && "Cannot get the length of a
value-dependent pack size expression"), function getPackLength, file
/poudriere/jails/headamd64244251/usr/src/contrib/llvm-project/clang/include/clang/AST/ExprCXX.h,
line 4170.
Stack dump:
0.      Program arguments: c++ -DHAVE_CONFIG_H -I. -DG_LOG_DOMAIN="Gjs"
-I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include
-I/usr/local/include -I/usr/local/include/gobject-introspection-1.0
-I/usr/local/lib/libffi-3.2.1/include -pthread -include
/usr/local/include/mozjs-52/js/RequiredDefines.h -I/usr/local/include/mozjs-52
-I/usr/local/include/nspr -DGJS_TOP_SRCDIR="." -DGJS_TOP_BUILDDIR="."
-DGJS_JS_DIR="/usr/local/share/gjs-1.0" -DPKGLIBDIR="/usr/local/lib/gjs" -I./gi
-DGJS_COMPILATION -I/usr/local/include/gtk-3.0 -I/usr/local/include/pango-1.0
-I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include
-I/usr/local/include -I/usr/local/include/fribidi -I/usr/local/include/cairo
-I/usr/local/include/pixman-1 -I/usr/local/include/freetype2
-I/usr/local/include/libdrm -I/usr/local/include/libpng16
-I/usr/local/include/harfbuzz -I/usr/local/include/gdk-pixbuf-2.0
-I/usr/local/include/gio-unix-2.0/ -I/usr/local/include/atk-1.0
-I/usr/local/include/at-spi2-atk/2.0 -I/usr/local/include/at-spi-2.0
-I/usr/local/include/dbus-1.0 -I/usr/local/lib/dbus-1.0/include -D_THREAD_SAFE
-pthread -I/usr/local/include -isystem /usr/local/include -fno-strict-aliasing
-Wall -Wextra -Wundef -Wwrite-strings -Wpointer-arith -Wmissing-declarations
-Wredundant-decls -Wno-unused-parameter -Wno-missing-field-initializers
-Wformat=2 -Wcast-align -Wformat-nonliteral -Wformat-security -Wsign-compare
-Wstrict-aliasing -Wshadow -Winline -Wpacked -Wmissing-format-attribute
-Wmissing-noreturn -Winit-self -Wmissing-include-dirs -Warray-bounds
-Wreturn-type -Wno-overloaded-virtual -Wswitch-enum -Wswitch-default
-Wno-error=unused-parameter -Wno-error=missing-field-initializers
-Wno-error=overloaded-virtual -O2 -pipe -fstack-protector-strong -isystem
/usr/local/include -fno-strict-aliasing -isystem /usr/local/include -fPIC -DPIC
-MT gi/libgjs_la-object.lo -MD -MP -MF gi/.deps/libgjs_la-object.Tpo -c
gi/object.cpp -fPIC -DPIC -o gi/.libs/libgjs_la-object.o 
1.      ./gjs/jsapi-util-args.h:410:5
<Spelling=/usr/local/include/glib-2.0/glib/gmacros.h:385:70>: current parser
token ')'
2.      ./gjs/jsapi-util-args.h:383:1: parsing function body
'gjs_parse_call_args'
3.      ./gjs/jsapi-util-args.h:383:1: in compound statement ('{}')
4.      ./gjs/jsapi-util-args.h:410:5
<Spelling=/usr/local/include/glib-2.0/glib/gtestutils.h:117:54>: in compound
statement ('{}')

This has independently been reported upstream by Jörg Sonnenberger:
https://bugs.llvm.org/show_bug.cgi?id=44980

Adding this bug to track whenever we import a fix from upstream.


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244251
[Bug 244251] [exp-run] Against projects/clang1000-import branch
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