I did a git bisect on the source and it identified this upstream commit
as being the potential culprit: https://salsa.debian.org/apt-
team/apt/commit/1adcf56bec7d2127d83aa423916639740fe8e586
I can confirm that this is the culprit by testing the output of `apt-
cdrom add` before and after reverting that specific commit from the tip
of master.
On further analysis, the following diff is the problematic one:
- for (std::vector<APT::Configuration::Compressor>::const_iterator c =
compressor.begin();
- c != compressor.end(); ++c)
+ for (auto const &ext: APT::Configuration::getCompressorExtensions())
{
- if (stat((file + c->Extension).c_str(), &Buf) != 0)
+ if (stat((file + ext).c_str(), &Buf) != 0)
Reverting that diff and that diff only fixes `apt-cdrom add`.
Julian, could you take a look at why this is problematic? I'm afraid I
don't have the expertise to proceed.
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https://bugs.launchpad.net/bugs/1746807
Title:
18.04 daily installer fails missing kernel
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