[Bug 1847232] Re: qemu TCG in s390x mode issue with calculating HASH

[Ivan Warren]

I was looking for a simpler method (without using go), but curl/wget and
whatnot don't seem to have any problem..  There must be something go is
doing that is different.

My guess (but ONLY a guess) is that the "go" TLS code might be doing
some dynamic checking on the z/Arch facility list (STFLE ?) and do some
dynamic change to the code path. Maybe a bit far fetched...

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https://bugs.launchpad.net/bugs/1847232

Title:
  qemu TCG in s390x mode issue with calculating HASH

Status in QEMU:
  New

Bug description:
  When using go on s390x on Debian x64 (buster) (host) and debian s390x
  (sid) (guest) I run into the following problem :

  The following occurs while trying to build a custom project :

  go: github.com/FactomProject/basen@v0.0.0-20150613233007-fe3947df716e:
  Get
  
https://proxy.golang.org/github.com/%21factom%21project/basen/@v/v0.0.0-20150613233007-fe3947df716e.mod:
  local error: tls: bad record MAC

  Doing a git bisect I find that this problem only occurs on and after
  commit 08ef92d556c584c7faf594ff3af46df456276e1b

  Before that commit, all works fine. Past this commit, build always
  fails.

  Without any proof, It looks like a hash calculation bug related to
  using z/Arch vector facilities...

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