[Bug 1926355] Re: Snap applications segfault with new core20 (rev: 1015+)

[Balint Reczey]

** Description changed:

- It seems that with our new core20 in the beta channel all snaps seem to
- be segfaulting. We recently had a new glibc landed in focal-updates -
- might be related.
+ [Impact]
+ 
+ * Core20 snap built with updated glibc crashes snaps also bundling
+ glibc.
+ 
+ [Test Plan]
+ 
+ * Build core20 snap with glibc in focal-proposed. Test a snap (which is
+ not core20) bundling glibc:
+ 
+ TODO: install locally built core20? 
+ snap install test-snapd-rsync-core20 --edge
+ snap run test-snapd-rsync-core20.rsync
+ 
+ [Where problems could occur]
+ 
+ * The previous glibc update (2.31-0ubuntu9.3) had a fix (LP: #1914044)
+ that broke snaps bundling a previous version of glibc (2.31-0ubuntu9.2)
+ due to them being incompatible. The fix of LP: #1914044 is reverted and
+ 2.31-0ubuntu9.4 does not include changes incompatible with
+ 2.31-0ubuntu9.2, thus the crash should not occur. No problems are
+ expected.
+ 
+ [Original Bug Text]
+ It seems that with our new core20 in the beta channel all snaps seem to be segfaulting. We recently had a new glibc landed in focal-updates - might be related.

** Also affects: glibc (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Changed in: glibc (Ubuntu Groovy)
       Status: New => Fix Released

** Changed in: glibc (Ubuntu Hirsute)
       Status: New => Fix Released

** Changed in: glibc (Ubuntu)
       Status: New => Fix Released

** Changed in: glibc (Ubuntu Focal)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/1926355

Title:
  Snap applications segfault with new core20 (rev: 1015+)

Status in snap-core20:
  New
Status in Snapcraft:
  New
Status in glibc package in Ubuntu:
  Fix Released
Status in glibc source package in Focal:
  In Progress
Status in glibc source package in Groovy:
  Fix Released
Status in glibc source package in Hirsute:
  Fix Released

Bug description:
  [Impact]

  * Core20 snap built with updated glibc crashes snaps also bundling
  glibc.

  [Test Plan]

  * Build core20 snap with glibc in focal-proposed. Test a snap (which
  is not core20) bundling glibc:

  TODO: install locally built core20? 
  snap install test-snapd-rsync-core20 --edge
  snap run test-snapd-rsync-core20.rsync

  [Where problems could occur]

  * The previous glibc update (2.31-0ubuntu9.3) had a fix (LP: #1914044)
  that broke snaps bundling a previous version of glibc
  (2.31-0ubuntu9.2) due to them being incompatible. The fix of LP:
  #1914044 is reverted and 2.31-0ubuntu9.4 does not include changes
  incompatible with 2.31-0ubuntu9.2, thus the crash should not occur. No
  problems are expected.

  [Original Bug Text]
  It seems that with our new core20 in the beta channel all snaps seem to be segfaulting. We recently had a new glibc landed in focal-updates - might be related.

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