From 2f4299bf39c85b694876cb8030fae0887e8b5edc Mon Sep 17 00:00:00 2001
From: Julian Andres Klode <jak@debian.org>
Date: Mon, 10 Nov 2025 10:41:20 +0100
Subject: Correctly copy provided version in m-a lazy-init

When a provides was copied, we inadvertently copied the package
version instead of the provided version. Copy the provided version
instead.

Closes: #1120463
---
 apt-pkg/pkgcachegen.cc                             |  2 +-
 .../test-bug-1120463-multi-arch-provides-version   | 24 ++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100755 test/integration/test-bug-1120463-multi-arch-provides-version

diff --git a/apt-pkg/pkgcachegen.cc b/apt-pkg/pkgcachegen.cc
index f3c3c10a0..7bf635972 100644
--- a/apt-pkg/pkgcachegen.cc
+++ b/apt-pkg/pkgcachegen.cc
@@ -793,7 +793,7 @@ bool pkgCacheGenerator::NewPackage(pkgCache::PkgIterator &Pkg, string_view Name,
 	       pkgCache::VerIterator V = Prv.OwnerVer();
 	       if (ArchA != V.ParentPkg().Arch())
 		  continue;
-	       if (NewProvides(V, Pkg, V->VerStr, pkgCache::Flag::MultiArchImplicit | pkgCache::Flag::ArchSpecific) == false)
+	       if (NewProvides(V, Pkg, Prv->ProvideVersion, pkgCache::Flag::MultiArchImplicit | pkgCache::Flag::ArchSpecific) == false)
 		  return false;
 	    }
 	    pkgCache::VerIterator V = PkgA.VersionList();
diff --git a/test/integration/test-bug-1120463-multi-arch-provides-version b/test/integration/test-bug-1120463-multi-arch-provides-version
new file mode 100755
index 000000000..cd2c6dd33
--- /dev/null
+++ b/test/integration/test-bug-1120463-multi-arch-provides-version
@@ -0,0 +1,24 @@
+#!/bin/sh
+set -e
+
+TESTDIR="$(readlink -f "$(dirname "$0")")"
+. "$TESTDIR/framework"
+
+setupenvironment
+configarchitecture 'amd64' 'i386'
+
+# This first initializes a "dep-virt" provides, but then lazy-inits the
+# dep-virt:amd64 one when this is being used later on.
+# In bug 1120463, we accidentally copied version 1.0 instead of 2.0...
+insertpackage 'unstable' 'dep' 'amd64' '1.0' 'Provides: dep-virt (= 2.0)'
+insertpackage 'unstable' 'app' 'i386' '1.0' 'Depends: dep-virt:amd64 (= 2.0)'
+
+
+setupaptarchive
+
+testsuccess aptcache showpkg dep
+mv rootdir/tmp/testsuccess.output showpkg
+testsuccessequal "Provides: 
+1.0 - dep-virt:amd64 (= 2.0) dep-virt (= 2.0) " grep ^Provides -A1 showpkg
+
+
-- 
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