view tests/test-merge4.t @ 40813:884321cd26c3 stable

rust: fix possible out-of-bounds read through index_get_parents()

index_get_parents() is an internal function, which doesn't check if the
specified rev is valid. If rustlazyancestors() were instantiated with an
invalid stoprev, it would access to invalid memory region.

This is NOT a security fix as there's no Python code triggering the bug,
but included in this series to not give a notion about the memory issue
fixed by the previous patch.

  $ hg init
  $ echo This is file a1 > a
  $ hg add a
  $ hg commit -m "commit #0"
  $ echo This is file b1 > b
  $ hg add b
  $ hg commit -m "commit #1"
  $ hg update 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo This is file c1 > c
  $ hg add c
  $ hg commit -m "commit #2"
  created new head
  $ hg merge 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ rm b
  $ echo This is file c22 > c

Test hg behaves when committing with a missing file added by a merge

  $ hg commit -m "commit #3"
  abort: cannot commit merge with missing files
  [255]