This bug was fixed in the package apt - 1.4.5
---------------
apt (1.4.5) unstable; urgency=medium
* Fix parsing of or groups in build-deps with ignored packages (LP:
#1694697)
-- Julian Andres Klode <j...@debian.org> Wed, 31 May 2017 14:52:25
+0200
** Changed in: apt (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1694697
Title:
build-depends keeps OR flag if end of or group is ignored
Status in apt package in Ubuntu:
Fix Released
Bug description:
[Impact]
If the last alternative(s) of an Or group is ignored, because it does
not match an architecture list, we would end up keeping the or flag,
effectively making the next AND an OR.
For example, when parsing (on amd64):
debhelper (>= 9), libnacl-dev [amd64] | libnacl-dev [i386]
=> debhelper (>= 9), libnacl-dev |
Which can cause python-apt and apt-get build-dep to crash.
Even worse:
debhelper (>= 9), libnacl-dev [amd64] | libnacl-dev [i386], foobar
=> debhelper (>= 9), libnacl-dev [amd64] | foobar
[Test case]
On amd64:
cat > segv.dsc << EOF
Format: 3.0 (native)
Source: foobar
Binary: foobar
Architecture: all
Version: 1
Maintainer: Joe Sixpack <j...@example.org>
Build-Depends: build-essential [amd64] | build-essential [fancy]
Standards-Version: 3.9.8
EOF
cat > failure.dsc << EOF
Format: 3.0 (native)
Source: foobar
Binary: foobar
Architecture: all
Version: 1
Maintainer: Joe Sixpack <j...@example.org>
Build-Depends: build-essential [amd64] | build-essential [fancy],
a-non-existing-package
Standards-Version: 3.9.8
EOF
(1) apt-get build-dep -s ./segv.dsc should succeed instead of crash
(2) apt-get build-dep -s ./failure.dsc should complain about "Depends:
a-non-existing-package but it is not installable" instead of succeeding.
This is the same test as run by CI and autopkgtests, so if they pass
the tests passed. You can also run apt-get build-dep -s dq for a real
life example that should not segfault.
[Regression Potential]
apt-get build-dep and friends can now fail where they succeeded previously
for packages that employ architecture-limited alternatives in their build
depends, as in the second example given above, because now additional packages
need to be installed (which is correct, though).
[Other info]
By setting the previous alternatives Or flag to the current Or flag
if the current alternative is ignored, we solve the issue.
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