Re: BUG #6760: make check fails on strings SQL T581 regex test

jez.wain@bull.net writes:
> ***************
> *** 347,354 ****
>    three |          f1          |       exp_ln_f1
>   -------+----------------------+-----------------------
>          |               1004.3 |                1004.3
> !        | 1.2345678901234e+200 | 1.23456789012338e+200
> !        | 1.2345678901234e-200 | 1.23456789012339e-200
>   (3 rows)

>   -- cube root
> --- 347,354 ----
>    three |          f1          |       exp_ln_f1
>   -------+----------------------+-----------------------
>          |               1004.3 |                1004.3
> !        | 1.2345678901234e+200 | 1.23456789012337e+200
> !        | 1.2345678901234e-200 |  1.2345678901234e-200
>   (3 rows)

This doesn't seem terribly surprising as a platform-specific difference.

>   -- T581 regular expression substring (with SQL99's bizarre regexp syntax)
>   SELECT SUBSTRING('abcdefg' FROM 'a#"(b_d)#"%' FOR '#') AS "bcd";
> ! ERROR:  invalid regular expression: parentheses () not balanced
> ! CONTEXT:  SQL function "substring" statement 1

This however isn't too good.  It suggests a platform-specific issue in
the regex library, but hard to say what.  Can you dig a little deeper,
maybe get a stack trace back from the call to errfinish()?  Does
compiling with -O0 change the behavior?

            regards, tom lane