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Re: Testsuite summary for GNU Bison 3.8.2 : FAIL 2

From: Akim Demaille
Subject: Re: Testsuite summary for GNU Bison 3.8.2 : FAIL 2
Date: Sat, 9 Oct 2021 10:35:38 +0200

Hi Dennis,

Thanks for this bug report.

> Le 5 oct. 2021 à 21:39, Dennis Clarke <dclarke@blastwave.org> a écrit :
> Basic C99 compile and then test suite run with result :
> beta $ cat test-suite.log
> FAIL: examples/c/mfcalc/mfcalc
> ==============================
> checking for diff --strip-trailing-cr...
> diff: illegal option -- strip-trailing-cr
> usage: diff [-bitw] [-c | -e | -f | -h | -n | -u] file1 file2
>      diff [-bitw] [-C number | -U number] file1 file2
>      diff [-bitw] [-D string] file1 file2
>      diff [-bitw] [-c | -e | -f | -h | -n | -u] [-l] [-r] [-s] [-S
> name] directory1 directory2
> checking for diff --strip-trailing-cr...

> Looks like ye old diff gets upset at an option there.

That's not a problem.  The test is actually checking whether it can use it or 
not.  Hence the "checking for diff --strip-trailing-cr...".

> mfcalc: PASS: 1
> mfcalc: PASS: 2
> mfcalc: PASS: 3
> mfcalc: FAIL: 4 (expected status: 0, effective: 139)
> ./examples/test: line 50:  7737 Segmentation Fault      (core dumped)
> "$abs_medir/$me" "$@"
> mfcalc: PASS: 5
> FAIL examples/c/mfcalc/mfcalc.test (exit status: 1)

However, this is bad.

Actually I guess that only the tests from the examples were run, and not the 
main test suite.  So I guest if you run `make check-tests`, you'll get many 
many failures.

If I'm not mistaken the fourth test of mfcalc is:

a = 256
sqrt (a)

I doubt that the problem is in the parser itself, I venture it's sqrt that does 
not work properly.  Let's try these inputs please:

echo 'a = 256' | ./examples/c/mfcalc/mfcalc

{ echo 'a = 256'; echo 'a+a'; } | ./examples/c/mfcalc/mfcalc

echo 'sqrt(256)' | ./examples/c/mfcalc/mfcalc

I expect the last one to fail.  If it does, please compile (with the same flags 
as the one used by Bison) and run this C program:

#include <math.h>
#include <stdio.h>
#include <stdlib.h>

int main (void)
 printf ("%f\n", sqrt (256.0));

If it does crash, then please try to see what needs to be done for it to work 

> FAIL: examples/c/glr/c++-types
> ==============================
> c++-types: FAIL: 1 (expected status: 0, effective: 139)
> ./examples/test: line 50:  7949 Segmentation Fault      (core dumped)
> "$abs_medir/$me" "$@"
> FAIL examples/c/glr/c++-types.test (exit status: 1)


Could you please replace examples/c/glr/c++-types/c++-types.test with the 
attached version, and run `make check-examples` again?  It should help us see 
which test case failed, and start tracking the failure.


Attachment: c++-types.test
Description: Binary data

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