solver3: Do not lose notion that we backtracked

Record a silly string if we backtracked such that we are aware
of it. We need to handle this in a broader fashion, but
this was at least breaking test-apt-never-markauto-sections
with remove-manual

LP: #2129819

1 files changed, 2 insertions, 0 deletions

diff --git a/apt-pkg/solver3.h b/apt-pkg/solver3.h
index 8d834b313..5590df5cc 100644
--- a/apt-pkg/solver3.h
+++ b/apt-pkg/solver3.h
@@ -477,6 +477,8 @@ struct APT::Solver::State
    // Vars < 0 are package ID, reasons > 0 are version IDs.
    const Clause *reason{};
 
+   const char *reasonStr{};
+
    // \brief The depth at which the decision has been taken
    depth_type depth{0};