8 changed files with 545 additions and 13 deletions
--- a/Gemfile.lock
+++ b/Gemfile.lock
@ -2,34 +2,34 @@ GEM
  remote: https://rubygems.org/
  specs:
    ast (2.4.2)
-    json (2.6.3)
-    parallel (1.23.0)
-    parser (3.2.2.0)
+    json (2.6.2)
+    parallel (1.22.1)
+    parser (3.1.2.1)
      ast (~> 2.4.1)
-    progressbar (1.13.0)
+    progressbar (1.11.0)
    rainbow (3.1.1)
    rake (13.0.6)
-    regexp_parser (2.8.0)
+    regexp_parser (2.6.0)
    rexml (3.2.5)
-    rubocop (1.50.2)
+    rubocop (1.38.0)
      json (~> 2.3)
      parallel (~> 1.10)
-      parser (>= 3.2.0.0)
+      parser (>= 3.1.2.1)
      rainbow (>= 2.2.2, < 4.0)
      regexp_parser (>= 1.8, < 3.0)
      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.28.0, < 2.0)
+      rubocop-ast (>= 1.23.0, < 2.0)
      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.28.0)
-      parser (>= 3.2.1.0)
-    ruby-progressbar (1.13.0)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.23.0)
+      parser (>= 3.1.1.0)
+    ruby-progressbar (1.11.0)
    sync (0.5.0)
    term-ansicolor (1.7.1)
      tins (~> 1.0)
    tins (1.32.1)
      sync
-    unicode-display_width (2.4.2)
+    unicode-display_width (2.3.0)

 PLATFORMS
  ruby
--- a/private/gcc-latest/README
+++ b/private/gcc-latest/README
@ -0,0 +1,6 @@
+GCC 12 with C, C++ and D support.
+
+GCC is the GNU Compiler Collection.
+
+D is a general-purpose programming language with static typing,
+systems-level access, and C-like syntax.
--- a/private/gcc-latest/gcc-latest.SlackBuild
+++ b/private/gcc-latest/gcc-latest.SlackBuild
@ -0,0 +1,192 @@
+#!/bin/bash
+# GCC package build script (written by volkerdi@slackware.com)
+#
+# Copyright 2003, 2004  Slackware Linux, Inc., Concord, California, USA
+# Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2021  Patrick J. Volkerding, Sebeka, MN, USA
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+# Modified 2011 by Eric Hameleers <alien at slackware.com> for OpenJDK.
+# Modified 2022 by Eugen Wissner <belka@caraus.de> for gcc-latest.
+
+cd $(dirname $0) ; CWD=$(pwd)
+
+PRGNAM=gcc-latest
+VERSION=${VERSION:-12.2.0}
+BUILD=${BUILD:-3}
+TAG=${TAG:-_SBo}
+PKGTYPE=${PKGTYPE:-tgz}
+
+# Automatically determine the architecture we're building on:
+if [ -z "$ARCH" ]; then
+  case "$(uname -m)" in
+    i?86) ARCH=i586 ;;
+    arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
+    # Unless $ARCH is already set, use uname -m for all other archs:
+    *) ARCH=$(uname -m) ;;
+  esac
+  export ARCH
+fi
+
+# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
+# the name of the created package would be, and then exit. This information
+# could be useful to other scripts.
+if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
+  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
+  exit 0
+fi
+
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i386" ]; then
+  LIBDIRSUFFIX=""
+  LIB_ARCH=i386
+elif [ "$ARCH" = "i486" ]; then
+  LIBDIRSUFFIX=""
+  LIB_ARCH=i386
+elif [ "$ARCH" = "i586" ]; then
+  LIBDIRSUFFIX=""
+  LIB_ARCH=i386
+elif [ "$ARCH" = "i686" ]; then
+  LIBDIRSUFFIX=""
+  LIB_ARCH=i386
+elif [ "$ARCH" = "s390" ]; then
+  LIBDIRSUFFIX=""
+  LIB_ARCH=s390
+elif [ "$ARCH" = "x86_64" ]; then
+  LIBDIRSUFFIX="64"
+  LIB_ARCH=amd64
+elif [ "$ARCH" = "armv7hl" ]; then
+  LIBDIRSUFFIX=""
+  LIB_ARCH=armv7hl
+else
+  LIBDIRSUFFIX=""
+  LIB_ARCH=$ARCH
+fi
+
+case "$ARCH" in
+    arm*) TARGET=$ARCH-slackware-linux-gnueabi ;;
+    *)    TARGET=$ARCH-slackware-linux ;;
+esac
+
+set -e # Exit on most errors
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+
+mkdir -p $PRGNAM-$VERSION
+cd $PRGNAM-$VERSION
+tar xvf $CWD/gcc-$VERSION.tar.?z
+cd gcc-$VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+# Smite the fixincludes:
+patch -p1 --verbose -i $CWD/patches/gcc-no_fixincludes.diff
+patch -p1 --verbose -i $CWD/patches/gdc-immutable-struct.patch
+patch -p1 --verbose -i $CWD/patches/gdc-link-lambda.patch
+
+mkdir ../objdir
+cd ../objdir
+
+if [ "$ARCH" != "x86_64" ]; then
+  GCC_ARCHOPTS="--with-arch=$ARCH"
+else
+  GCC_ARCHOPTS="--disable-multilib"
+fi
+
+../gcc-$VERSION/configure \
+  --prefix=/usr \
+  --libdir=/usr/lib$LIBDIRSUFFIX \
+  --mandir=/usr/man \
+  --infodir=/usr/info \
+  --enable-shared \
+  --enable-bootstrap \
+  --enable-languages=c,c++,d \
+  --enable-threads=posix \
+  --enable-checking=release \
+  --with-system-zlib \
+  --disable-libquadmath-support \
+  --with-default-libstdcxx-abi=new \
+  --disable-libstdcxx-pch \
+  --disable-libunwind-exceptions \
+  --enable-__cxa_atexit \
+  --disable-libssp \
+  --enable-gnu-unique-object \
+  --enable-plugin \
+  --enable-lto \
+  --disable-install-libiberty \
+  --disable-werror \
+  --with-gcc-major-version-only \
+  --with-gnu-ld \
+  --with-isl \
+  --program-suffix=-12 \
+  --enable-version-specific-runtime-libs \
+  --with-arch-directory=$LIB_ARCH \
+  --disable-gtktest \
+  --enable-clocale=gnu \
+  --enable-libphobos \
+  $GCC_ARCHOPTS \
+  --target=${TARGET} \
+  --build=${TARGET} \
+  --host=${TARGET}
+
+make
+make install-strip DESTDIR=$PKG
+
+rm $PKG/usr/lib${LIBDIRSUFFIX}/*.la
+
+mkdir -p $PKG/usr/share/gdb/auto-load/usr/lib$LIBDIRSUFFIX
+
+mv $PKG/usr/lib$LIBDIRSUFFIX/gcc/$TARGET/12/*-gdb.py \
+  $PKG/usr/share/gdb/auto-load/usr/lib$LIBDIRSUFFIX/
+mv $PKG/usr/lib${LIBDIRSUFFIX}/*.so* \
+  $PKG/usr/lib$LIBDIRSUFFIX/gcc/$TARGET/12/
+
+cd ../gcc-$VERSION
+
+# They conflict with the stock package.
+rm -rf $PKG/usr/man/man7 \
+  $PKG/usr/info \
+  $PKG/usr/share/locale
+
+# Compress man pages
+find $PKG/usr/man -type f -exec gzip -9 {} \;
+for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a \
+  COPYING* ChangeLog* INSTALL LAST_UPDATED MAINTAINERS NEWS README* \
+  $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE
--- a/private/gcc-latest/gcc-latest.info
+++ b/private/gcc-latest/gcc-latest.info
@ -0,0 +1,10 @@
+PRGNAM="gcc-latest"
+VERSION="12.2.0"
+HOMEPAGE="https://gcc.gnu.org/"
+DOWNLOAD="https://ftp.gnu.org/gnu/gcc/gcc-12.2.0/gcc-12.2.0.tar.xz"
+MD5SUM="73bafd0af874439dcdb9fc063b6fb069"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="%README%"
+MAINTAINER="Eugen Wissner"
+EMAIL="belka@caraus.de"
--- a/private/gcc-latest/patches/gcc-no_fixincludes.diff
+++ b/private/gcc-latest/patches/gcc-no_fixincludes.diff
@ -0,0 +1,27 @@
+--- ./gcc/Makefile.in.orig	2018-03-09 09:24:44.000000000 -0600
+++ ./gcc/Makefile.in	2018-05-02 12:25:43.958002771 -0500
+@@ -3004,9 +3004,9 @@
+ 	  chmod a+r $${fix_dir}/limits.h; \
+ 	done
+ # Install the README
+-	rm -f include-fixed/README
+-	cp $(srcdir)/../fixincludes/README-fixinc include-fixed/README
+-	chmod a+r include-fixed/README
+#	rm -f include-fixed/README
+#	cp $(srcdir)/../fixincludes/README-fixinc include-fixed/README
+#	chmod a+r include-fixed/README
+ 	$(STAMP) $@
+ 
+ .PHONY: install-gcc-tooldir
+@@ -3087,10 +3087,7 @@
+ 	    (TARGET_MACHINE='$(target)'; srcdir=`cd $(srcdir); ${PWD_COMMAND}`; \
+ 	      SHELL='$(SHELL)'; MACRO_LIST=`${PWD_COMMAND}`/macro_list ; \
+ 	      gcc_dir=`${PWD_COMMAND}` ; \
+-	      export TARGET_MACHINE srcdir SHELL MACRO_LIST && \
+-	      cd $(build_objdir)/fixincludes && \
+-	      $(SHELL) ./fixinc.sh "$${gcc_dir}/$${fix_dir}" \
+-	        $(BUILD_SYSTEM_HEADER_DIR) $(OTHER_FIXINCLUDES_DIRS) ); \
+	      export TARGET_MACHINE srcdir SHELL MACRO_LIST ); \
+ 	    rm -f $${fix_dir}/syslimits.h; \
+ 	    if [ -f $${fix_dir}/limits.h ]; then \
+ 	      mv $${fix_dir}/limits.h $${fix_dir}/syslimits.h; \
--- a/private/gcc-latest/patches/gdc-immutable-struct.patch
+++ b/private/gcc-latest/patches/gdc-immutable-struct.patch
@ -0,0 +1,91 @@
+From 2583365912c8700abe1f4a23ed611acb80fac09d Mon Sep 17 00:00:00 2001
+From: Iain Buclaw <ibuclaw@gdcproject.org>
+Date: Mon, 27 Feb 2023 20:46:18 +0100
+Subject: [PATCH] d: Fix ICE on explicit immutable struct import [PR108877]
+
+Const and immutable types are built as variants of the type they are
+derived from, and TYPE_STUB_DECL is not set for these variants.
+
+	PR d/108877
+
+gcc/d/ChangeLog:
+
+	* imports.cc (ImportVisitor::visit (EnumDeclaration *)): Call
+	make_import on TYPE_MAIN_VARIANT.
+	(ImportVisitor::visit (AggregateDeclaration *)): Likewise.
+	(ImportVisitor::visit (ClassDeclaration *)): Likewise.
+
+gcc/testsuite/ChangeLog:
+
+	* gdc.dg/imports/pr108877a.d: New test.
+	* gdc.dg/pr108877.d: New test.
+
+(cherry picked from commit ce1cea3e22f58bbddde017f8a92e59bae8892339)
+---
+ gcc/d/imports.cc                         | 7 ++++++-
+ gcc/testsuite/gdc.dg/imports/pr108877a.d | 6 ++++++
+ gcc/testsuite/gdc.dg/pr108877.d          | 9 +++++++++
+ 3 files changed, 21 insertions(+), 1 deletion(-)
+ create mode 100644 gcc/testsuite/gdc.dg/imports/pr108877a.d
+ create mode 100644 gcc/testsuite/gdc.dg/pr108877.d
+
+diff --git a/gcc/d/imports.cc b/gcc/d/imports.cc
+index dfda2401ee8..6a59ef61b9c 100644
+--- a/gcc/d/imports.cc
+++ b/gcc/d/imports.cc
+@@ -106,12 +106,16 @@ public:
+     tree type = build_ctype (d->type);
+     /* Not all kinds of D enums create a TYPE_DECL.  */
+     if (TREE_CODE (type) == ENUMERAL_TYPE)
+-      this->result_ = this->make_import (TYPE_STUB_DECL (type));
+      {
+	type = TYPE_MAIN_VARIANT (type);
+	this->result_ = this->make_import (TYPE_STUB_DECL (type));
+      }
+   }
+ 
+   void visit (AggregateDeclaration *d)
+   {
+     tree type = build_ctype (d->type);
+    type = TYPE_MAIN_VARIANT (type);
+     this->result_ = this->make_import (TYPE_STUB_DECL (type));
+   }
+ 
+@@ -119,6 +123,7 @@ public:
+   {
+     /* Want the RECORD_TYPE, not POINTER_TYPE.  */
+     tree type = TREE_TYPE (build_ctype (d->type));
+    type = TYPE_MAIN_VARIANT (type);
+     this->result_ = this->make_import (TYPE_STUB_DECL (type));
+   }
+ 
+diff --git a/gcc/testsuite/gdc.dg/imports/pr108877a.d b/gcc/testsuite/gdc.dg/imports/pr108877a.d
+new file mode 100644
+index 00000000000..a23c78ddf84
+--- /dev/null
+++ b/gcc/testsuite/gdc.dg/imports/pr108877a.d
+@@ -0,0 +1,6 @@
+immutable struct ImmutableS { }
+const struct ConstS { }
+immutable class ImmutableC { }
+const class ConstC { }
+immutable enum ImmutableE { _ }
+const enum ConstE { _ }
+diff --git a/gcc/testsuite/gdc.dg/pr108877.d b/gcc/testsuite/gdc.dg/pr108877.d
+new file mode 100644
+index 00000000000..710551f3f9a
+--- /dev/null
+++ b/gcc/testsuite/gdc.dg/pr108877.d
+@@ -0,0 +1,9 @@
+// { dg-options "-I $srcdir/gdc.dg" }
+// { dg-do compile }
+import imports.pr108877a :
+    ImmutableS,
+    ConstS,
+    ImmutableC,
+    ConstC,
+    ImmutableE,
+    ConstE;
+-- 
+2.31.1
+
--- a/private/gcc-latest/patches/gdc-link-lambda.patch
+++ b/private/gcc-latest/patches/gdc-link-lambda.patch
@ -0,0 +1,187 @@
+From 3b8b42f32627ca5ad029fe418a5839b9fc4512e9 Mon Sep 17 00:00:00 2001
+From: Iain Buclaw <ibuclaw@gdcproject.org>
+Date: Sat, 10 Dec 2022 22:11:41 +0100
+Subject: [PATCH] d: Fix undefined reference to nested lambda in template
+ (PR108055)
+
+Sometimes, nested lambdas of templated functions get no code generation
+due to them being marked as instantianted outside of all modules being
+compiled in the current compilation unit.  This despite enclosing
+template instances being marked as instantiated inside the current
+compilation unit.  To fix, all enclosing templates are now checked in
+`function_defined_in_root_p'.
+
+Because of this change, `function_needs_inline_definition_p' has also
+been fixed up to only check whether the regular function definition
+itself is to be emitted in the current compilation unit.
+
+	PR d/108055
+
+gcc/d/ChangeLog:
+
+	* decl.cc (function_defined_in_root_p): Check all enclosing template
+	instances for definition in a root module.
+	(function_needs_inline_definition_p): Replace call to
+	function_defined_in_root_p with test for outer module `isRoot'.
+
+gcc/testsuite/ChangeLog:
+
+	* gdc.dg/torture/imports/pr108055conv.d: New.
+	* gdc.dg/torture/imports/pr108055spec.d: New.
+	* gdc.dg/torture/imports/pr108055write.d: New.
+	* gdc.dg/torture/pr108055.d: New test.
+
+(cherry picked from commit 9fe7d3debbf60ed9fef8053123ad542a99d62100)
+---
+ gcc/d/decl.cc                                 | 14 ++++++----
+ .../gdc.dg/torture/imports/pr108055conv.d     | 26 +++++++++++++++++++
+ .../gdc.dg/torture/imports/pr108055spec.d     | 18 +++++++++++++
+ .../gdc.dg/torture/imports/pr108055write.d    | 19 ++++++++++++++
+ gcc/testsuite/gdc.dg/torture/pr108055.d       | 12 +++++++++
+ 5 files changed, 84 insertions(+), 5 deletions(-)
+ create mode 100644 gcc/testsuite/gdc.dg/torture/imports/pr108055conv.d
+ create mode 100644 gcc/testsuite/gdc.dg/torture/imports/pr108055spec.d
+ create mode 100644 gcc/testsuite/gdc.dg/torture/imports/pr108055write.d
+ create mode 100644 gcc/testsuite/gdc.dg/torture/pr108055.d
+
+diff --git a/gcc/d/decl.cc b/gcc/d/decl.cc
+index e62be0c580a..11fd7f6c81f 100644
+--- a/gcc/d/decl.cc
+++ b/gcc/d/decl.cc
+@@ -1023,7 +1023,8 @@ build_decl_tree (Dsymbol *d)
+   input_location = saved_location;
+ }
+ 
+-/* Returns true if function FD is defined or instantiated in a root module.  */
+/* Returns true if function FD, or any lexically enclosing scope function of FD
+   is defined or instantiated in a root module.  */
+ 
+ static bool
+ function_defined_in_root_p (FuncDeclaration *fd)
+@@ -1032,9 +1033,11 @@ function_defined_in_root_p (FuncDeclaration *fd)
+   if (md && md->isRoot ())
+     return true;
+ 
+-  TemplateInstance *ti = fd->isInstantiated ();
+-  if (ti && ti->minst && ti->minst->isRoot ())
+-    return true;
+  for (TemplateInstance *ti = fd->isInstantiated (); ti != NULL; ti = ti->tinst)
+    {
+      if (ti->minst && ti->minst->isRoot ())
+	return true;
+    }
+ 
+   return false;
+ }
+@@ -1062,7 +1065,8 @@ function_needs_inline_definition_p (FuncDeclaration *fd)
+ 
+   /* Check whether function will be regularly defined later in the current
+      translation unit.  */
+-  if (function_defined_in_root_p (fd))
+  Module *md = fd->getModule ();
+  if (md && md->isRoot ())
+     return false;
+ 
+   /* Non-inlineable functions are always external.  */
+diff --git a/gcc/testsuite/gdc.dg/torture/imports/pr108055conv.d b/gcc/testsuite/gdc.dg/torture/imports/pr108055conv.d
+new file mode 100644
+index 00000000000..93ebba747b1
+--- /dev/null
+++ b/gcc/testsuite/gdc.dg/torture/imports/pr108055conv.d
+@@ -0,0 +1,26 @@
+module imports.pr108055conv;
+
+T toStr(T, S)(S src)
+{
+    static if (is(typeof(T.init[0]) E))
+    {
+        struct Appender
+        {
+            inout(E)[] data;
+        }
+
+        import imports.pr108055spec;
+        import imports.pr108055write;
+
+        auto w = Appender();
+        FormatSpec!E f;
+        formatValue(w, src, f);
+        return w.data;
+    }
+}
+
+T to(T, A)(A args)
+{
+    return toStr!T(args);
+}
+
+diff --git a/gcc/testsuite/gdc.dg/torture/imports/pr108055spec.d b/gcc/testsuite/gdc.dg/torture/imports/pr108055spec.d
+new file mode 100644
+index 00000000000..801c5810516
+--- /dev/null
+++ b/gcc/testsuite/gdc.dg/torture/imports/pr108055spec.d
+@@ -0,0 +1,18 @@
+module imports.pr108055spec;
+
+template Unqual(T : const U, U)
+{
+    alias Unqual = U;
+}
+
+template FormatSpec(Char)
+if (!is(Unqual!Char == Char))
+{
+    alias FormatSpec = FormatSpec!(Unqual!Char);
+}
+
+struct FormatSpec(Char)
+if (is(Unqual!Char == Char))
+{
+    const(Char)[] nested;
+}
+diff --git a/gcc/testsuite/gdc.dg/torture/imports/pr108055write.d b/gcc/testsuite/gdc.dg/torture/imports/pr108055write.d
+new file mode 100644
+index 00000000000..fe41d7baa7c
+--- /dev/null
+++ b/gcc/testsuite/gdc.dg/torture/imports/pr108055write.d
+@@ -0,0 +1,19 @@
+module imports.pr108055write;
+import imports.pr108055spec;
+
+void formatValueImpl(Writer, T, Char)(ref Writer , const(T) ,
+                                      scope const ref FormatSpec!Char )
+{
+    T val;
+    char spec;
+
+    (ref val) @trusted {
+        return (cast(const char*) &val)[0 .. val.sizeof];
+    }(val);
+
+}
+
+void formatValue(Writer, T, Char)(Writer w, T val, Char f)
+{
+    formatValueImpl(w, val, f);
+}
+diff --git a/gcc/testsuite/gdc.dg/torture/pr108055.d b/gcc/testsuite/gdc.dg/torture/pr108055.d
+new file mode 100644
+index 00000000000..c4ffad26d1e
+--- /dev/null
+++ b/gcc/testsuite/gdc.dg/torture/pr108055.d
+@@ -0,0 +1,12 @@
+// { dg-do link }
+// { dg-additional-files "imports/pr108055conv.d imports/pr108055spec.d imports/pr108055write.d" }
+// { dg-additional-options "-I[srcdir] -fno-druntime" }
+import imports.pr108055conv;
+
+extern(C) int main()
+{
+    float zis;
+    static if (is(typeof(to!string(&zis))))
+        to!string(&zis);
+    return 0;
+}
+-- 
+2.31.1
+
--- a/private/gcc-latest/slack-desc
+++ b/private/gcc-latest/slack-desc
@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description. Line
+# up the first '|' above the ':' following the base package name, and the '|' on
+# the right side marks the last column you can put a character in. You must make
+# exactly 11 lines for the formatting to be correct. It's also customary to
+# leave one space after the ':'.
+
+          |-----handy-ruler------------------------------------------------------|
+gcc-latest: gcc-latest (GCC package with C, C++ and D support)
+gcc-latest:
+gcc-latest: GCC is the GNU Compiler Collection.
+gcc-latest:
+gcc-latest: D is a general-purpose programming language with static typing,
+gcc-latest: systems-level access, and C-like syntax.
+gcc-latest:
+gcc-latest:
+gcc-latest:
+gcc-latest:
+gcc-latest: