bash: how to interpret the test-results

I must admit that I've never paid attention to the test-results for
bash.  Bash has always worked, no problems.

After updating glibc to -2.41, I rebuilt bash-5.1.16 and ran the tests
with  "make tests"  (as described in "Install" in the sources).

The book says: "Any output from diff (prefixed with < and >) indicates a
test failure, unless there is a message saying the difference can be
ignored."

A line in the log says: "Any output from any test, unless otherwise
noted, indicates a possible anomaly"

According to that almost all of the 82 tests ("run-soandso") must have
failed because all have "anomalies".  For example:

run-alias
3c3
< ./alias.tests: Zeile 38: qfoo: Kommando nicht gefunden.
---
> ./alias.tests: line 38: qfoo: command not found
run-appendop
18c18
< ./appendop.tests: Zeile 97: x: Schreibgeschützte Variable.
---
> ./appendop.tests: line 97: x: readonly variable
run-arith
63c63
< ./arith.tests: Zeile 127: 1 ? 20 : x+=2: Versuchte Zuweisung zu etwas,
das keine Variable ist. (Fehlerverursachendes Zeichen ist "+=2").
---
> ./arith.tests: line 127: 1 ? 20 : x+=2: attempted assignment to
non-variable (error token is "+=2")
83,92c83,92

And so on and so on.  "<" in German, ">" in English.  The test-results
are the same with glibc-2.35 and -2.41.  I mean I had _zero_ FAILS of
over 6000 tests for glibc-2.41 but almost every test for bash indicates
failure?

I don't know what to make of it.  Any insights, please?  Thanks.

Rainer

-- 
The truth always turns out to be simpler than you thought.
Richard Feynman

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