[Monotone-devel] Issue 96 - SQLite 3.7.3 breakage (monotone)

[code]

Hello,

A new issue has been created and assigned
to you:

96 - SQLite 3.7.3 breakage
Project: monotone
Status: New
Reported by: Thomas Keller
Labels:
 Type:Defect
 Priority:Critical

Description:

Steps to reproduce the problem:
-------------------------------

$ mtn ls vars

Expected result:
----------------

Database variables

Actual results:
---------------

mtn: fatal: error: null result in query: SELECT domain, name, value FROM db_vars
mtn: this is almost certainly a bug in monotone.
...

Output of `mtn version --full`:
-------------------------------

monotone 0.99dev (base revision: 104f634f6a14e8e085ba5c89d8b95d16ae5b62c4)
Running on          : Darwin 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 
16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386 i386
C++ compiler        : GNU C++ version 4.0.1 (Apple Inc. build 5490)
C++ standard library: GNU libstdc++ version 20050421
Boost version       : 1_44
SQLite version      : 3.7.3 (compiled against 3.7.2)
Lua version         : Lua 5.1
PCRE version        : 8.10 2010-06-25 (compiled against 8.10)
Botan version       : 1.8.10 (compiled against 1.8.10)
Changes since base revision:
format_version "1"

new_manifest [c679fc930e31daba26c09dc437f950a0d7fe7d78]

old_revision [104f634f6a14e8e085ba5c89d8b95d16ae5b62c4]


-----------

This seems to be a runtime-only problem, i.e. it doesn't matter that mtn is 
compiled against 3.7.2 for the problem to pop up. The invariant in 
database.cc:1537 fires, because a column we're trying to fetch returns a NULL 
result:

// value is NULL
const char * value = \
  (const char*)sqlite3_column_blob(i->second.stmt(), col);

I'm not sure why this is the case and I cannot take on this right now. I hope I 
can evaluate the problem more in detail later on.

--
Issue: http://code.monotone.ca/p/monotone/issues/96/