Re: Assert triggered during RE_compile_and_cache
Mark Dilger <mark.dilger@enterprisedb.com>
From: Mark Dilger <mark.dilger@enterprisedb.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2021-08-05T20:49:00Z
Lists: pgsql-hackers
> On Aug 5, 2021, at 1:38 PM, Mark Dilger <mark.dilger@enterprisedb.com> wrote:
>
> +select 'vyrlvyrlwvqko' ~ '(?:(?:((.))))((\2)\1.){0,0}?';
I've boiled it down a bit more:
+select '' ~ '()\1{0}';
+ ?column?
+----------
+ t
+(1 row)
+
+select '' ~ '()(\1){0}';
+ ?column?
+----------
+ t
+(1 row)
+
+select '' ~ '(())\2{0}';
+ ?column?
+----------
+ t
+(1 row)
+
+select '' ~ '(())(\2){0}';
+server closed the connection unexpectedly
+ This probably means the server terminated abnormally
+ before or while processing the request.
+connection to server was lost
Any ideas?
—
Mark Dilger
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
Commits
-
Check the size in COPY_POINTER_FIELD
- c1132aae336c 15.0 cited
-
Rethink regexp engine's backref-related compilation state.
- 5227d9989672 14.0 landed
- 00116dee5ad4 15.0 landed
-
Fix use-after-free issue in regexp engine.
- f42ea8350db2 14.0 landed
- cc1868799c83 15.0 landed
-
Make regexp engine's backref-related compilation state more bulletproof.
- cb76fbd7ec87 15.0 landed
- 5e6ad63c6db7 14.0 landed
-
Really fix the ambiguity in REFRESH MATERIALIZED VIEW CONCURRENTLY.
- ba9f665a4413 13.4 cited
-
Avoid generating extra subre tree nodes for capturing parentheses.
- ea1268f6301c 14.0 cited