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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0000494||Core Inform||Indexing||public||2011-01-07 10:46||2011-01-10 11:15|
|Target Version||Fixed in Version||6G60|
|Summary||0000494: Massive CPU and memory usage when rooms in index map are positioned self-referentially|
|Description||Massive memory consumption and long delay when compiling or clicking on the Index - World tab when the source changes relative positions of rooms in a cycle. For example, the code below takes up 360MB of memory after clicking the Index - World tab, following a minute of computation:|
|Minimal Source Text To Reproduce|
Ad is north from Bo. Index map with Ad mapped south from Bo. Index map with Bo mapped northwest from Ad.
|Additional Information||The problem gets exponentially worse as more rooms are rearranged on the Index Map. But in fact, the following code refuses to compile at all, claiming lack of memory (on an 8 gig system!): |
"Alpha is a room. Index map with Alpha mapped southeast from Alpha."
I realize it's a bit much to expect an interactive fiction IDE to solve the halting problem, but is it possible to identify cycles like this and stop compiling with a syntax error? I accidentally ran into this problem on a big map, and since I didn't realize what had happened I was pretty much forced to revert to an older project file to fix the problem.
|Effect||(critical) Compiler hangs|
|Moving to Core Inform since the index generation is platform-independent.|
|Whoops, I can't seem to reproduce it in 6G06. The index map overhaul seems to have corrected the issue. Sorry about not checking for a new release version before submitting this issue, I just downloaded 6F95 a couple weeks ago.|
Confirmed in 6F95, and verified fixed in 6G06.
|2011-01-07 10:46||ChrisC||New Issue|
|2011-01-07 18:34||jmcgrew||Status||new => acknowledged|
|2011-01-07 18:34||jmcgrew||Project||Windows Inform application => Core Inform|
|2011-01-07 18:38||jmcgrew||Effect||=> (critical) Compiler hangs|
|2011-01-07 18:38||jmcgrew||Note Added: 0000946|
|2011-01-07 18:38||jmcgrew||Severity||serious => critical|
|2011-01-07 18:38||jmcgrew||Category||User Interface => Indexing|
|2011-01-07 18:38||jmcgrew||Tag Attached: wrongeffect|
|2011-01-07 19:41||ChrisC||Note Added: 0000947|
|2011-01-08 10:43||EmacsUser||Note Added: 0000948|
|2011-01-08 10:43||EmacsUser||Status||acknowledged => resolved|
|2011-01-08 10:43||EmacsUser||Resolution||open => fixed|
|2011-01-08 10:43||EmacsUser||Fixed in Version||=> 6G60|
|2011-01-10 11:15||jmcgrew||Status||resolved => closed|
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