{
	"id": "79534",
	"key": "TIMOB-5196",
	"fields": {
		"issuetype": {
			"id": "1",
			"description": "A problem which impairs or prevents the functions of the product.",
			"name": "Bug",
			"subtask": false
		},
		"project": {
			"id": "10153",
			"key": "TIMOB",
			"name": "Titanium SDK/CLI",
			"projectCategory": {
				"id": "10100",
				"description": "Titanium and related SDKs used in application development",
				"name": "Client"
			}
		},
		"fixVersions": [
			{
				"id": "12077",
				"description": "",
				"name": "Sprint 2011-37",
				"archived": true,
				"released": true,
				"releaseDate": "2011-09-19"
			}
		],
		"resolution": {
			"id": "5",
			"description": "All attempts at reproducing this issue failed, or not enough information was available to reproduce the issue. Reading the code produces no clues as to why this behavior would occur. If more information appears later, please reopen the issue.",
			"name": "Cannot Reproduce"
		},
		"resolutiondate": "2011-09-13T15:09:50.000+0000",
		"created": "2011-08-23T04:29:26.000+0000",
		"priority": {
			"name": "Critical",
			"id": "1"
		},
		"labels": [
			"dr-list"
		],
		"versions": [],
		"issuelinks": [
			{
				"id": "12666",
				"type": {
					"id": "10002",
					"name": "Duplicate",
					"inward": "is duplicated by",
					"outward": "duplicates"
				},
				"inwardIssue": {
					"id": "79093",
					"key": "AC-3089",
					"fields": {
						"summary": "Running  a large number of queries on a database causes crash",
						"status": {
							"description": "The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.",
							"name": "Closed",
							"id": "6",
							"statusCategory": {
								"id": 3,
								"key": "done",
								"colorName": "green",
								"name": "Done"
							}
						},
						"issuetype": {
							"id": "1",
							"description": "A problem which impairs or prevents the functions of the product.",
							"name": "Bug",
							"subtask": false
						}
					}
				}
			}
		],
		"assignee": {
			"name": "srahim",
			"key": "srahim",
			"displayName": "Sabil Rahim",
			"active": true,
			"timeZone": "America/Los_Angeles"
		},
		"updated": "2017-03-31T17:28:35.000+0000",
		"status": {
			"description": "The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.",
			"name": "Closed",
			"id": "6",
			"statusCategory": {
				"id": 3,
				"key": "done",
				"colorName": "green",
				"name": "Done"
			}
		},
		"components": [
			{
				"id": "10206",
				"name": "iOS",
				"description": "iOS Platform"
			}
		],
		"description": "Starting from 1.7.0 up to the current 1.7.3.v20110808134952 CI build I'm getting random crashes in my app. I've managed to reproduce them, just copy the following code into the app.js of a new project:\r\n\r\n{code:javascript|title=app.js}\r\nfunction read_from_db(thisLabel)\r\n{\r\n  Ti.API.info('read_from_db: start');\r\n  Ti.API.info('thisLabel' + thisLabel);\r\n  thisLabel.text = 'Reading from the database...';\r\n  var db = Ti.Database.open('data.db');\r\n\r\n  for(var i=0; i<10000; i++){\r\n    var resultSet = db.execute('select * from data');\r\n    if(resultSet.isValidRow()) {\r\n      Ti.API.info('Database row: (' + i + ') ' + resultSet.fieldByName('col1') + ' / '+ resultSet.fieldByName('col2'));\r\n    }\r\n    resultSet.close();\r\n  }\r\n  db.close();\r\n  thisLabel.text = 'Finished reading from the database.';\r\n  Ti.API.info('read_from_db: end');\r\n}\r\n\r\nvar number_of_iterations = 5000;\t// This is not required\r\nvar number_of_db_rows = 200;\r\n\r\n//Create and initialize the database\r\nvar db = Ti.Database.open('data.db');\r\ndb.execute('create table if not exists data (col1 primary key,col2)');\r\ndb.execute('begin transaction');\r\ndb.execute('delete from data');\r\nfor(var i=0; i<number_of_db_rows; i++) {\r\n  db.execute('insert or replace into data (col1,col2) values (?,?)',i,i+1);\r\n}\r\ndb.execute('commit transaction');\r\ndb.close();\r\n\r\nvar tabGroup = Ti.UI.createTabGroup();\r\n\r\nvar win1 = Ti.UI.createWindow({\r\n  backgroundColor: 'green',\r\n  layout:'vertical'\r\n});\r\n\r\nvar b = Ti.UI.createButton({\r\n  title:'Read from the DB',\r\n  top:60,\r\n  height:50\r\n});\r\nwin1.add(b);\r\n\r\nvar label = Ti.UI.createLabel({\r\n  top:60,\r\n  height:60,\r\n  color:'white',\r\n  text:'Click the button to start'\r\n});\r\nwin1.add(label);\r\n\r\nvar Tab1 = Titanium.UI.createTab({\r\n  title:'Tab 1',\r\n  window:win1\r\n});\r\n\r\ntabGroup.addTab(Tab1);\r\ntabGroup.open();\r\n\r\nb.addEventListener('click',function(e) {\r\n  read_from_db(label);\r\n});\r\n{code}\r\n\r\nClicking the button will crash the iPhone simulator. \r\n\r\nDepending on the timing or the numbers chosen at the start sometimes this code will fail with a 'resultSet.isValidRow is not a valid function' instead of crashing.",
		"attachment": [],
		"flagged": false,
		"summary": "Reading from a database crashes the app",
		"creator": {
			"name": "jsilva",
			"key": "jsilva",
			"displayName": "João Silva",
			"active": true,
			"timeZone": "Europe/London"
		},
		"subtasks": [],
		"reporter": {
			"name": "jsilva",
			"key": "jsilva",
			"displayName": "João Silva",
			"active": true,
			"timeZone": "Europe/London"
		},
		"environment": "* iPhone simulator (see below)\r\n* Titanium 1.7.0 up to 1.7.3.v20110808134952\r\n\r\n{noformat}\r\nTi version       Simulator version     Result\r\n----------      ------------------   --------\r\n1.6.2                iOS 4.3            OK\r\n1.7.0                iOS 4.3            Crash\r\n1.7.2                iOS 4.0,4.2,4.3    Crash\r\n1.7.3v20110826161351 iOS 4.3            Crash\r\n{noformat}",
		"comment": {
			"comments": [
				{
					"id": "163992",
					"author": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"body": "The code presented in this issue clearly demonstrates an important bug in Titanium 1.7. Has anyone reproduced it yet?\r\n\r\n(See also the Q&A post http://developer.appcelerator.com/question/123736/reproducible-crash-and-errors-with-database-access-in-172)\r\n",
					"updateAuthor": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"created": "2011-08-25T06:03:15.000+0000",
					"updated": "2011-08-25T06:03:15.000+0000"
				},
				{
					"id": "164087",
					"author": {
						"name": "bxg",
						"key": "bxg",
						"displayName": "bxg",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"body": "I cannot get it to happen predictably enough to get a solid case.  It happens every 10 - 20 times I run the simulator.  It's a serious impediment to development.  Once it happens, it will happen every time until I remove the app from the simulator.",
					"updateAuthor": {
						"name": "bxg",
						"key": "bxg",
						"displayName": "bxg",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"created": "2011-08-25T16:51:52.000+0000",
					"updated": "2011-08-25T16:51:52.000+0000"
				},
				{
					"id": "164461",
					"author": {
						"name": "pdowsett",
						"key": "pdowsett",
						"displayName": "Paul Dowsett",
						"active": true,
						"timeZone": "Europe/London"
					},
					"body": "Use my code in this updated ticket as a starting point to prove whether this behavior you have observed is actually a bug in Titanium. If it does, reopen this ticket.\r\n\r\nSome points to note:\r\n\r\n* use the {{while}} construct to iterate through your query\r\n* remember to declare variables using the javascript {{var}} keyword\r\n* functions have scopes. You need to pass any data created outside of them as arguments\r\n",
					"updateAuthor": {
						"name": "pdowsett",
						"key": "pdowsett",
						"displayName": "Paul Dowsett",
						"active": true,
						"timeZone": "Europe/London"
					},
					"created": "2011-08-30T01:14:49.000+0000",
					"updated": "2011-08-30T03:01:03.000+0000"
				},
				{
					"id": "164894",
					"author": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"body": "I've tested the latest code as requested in the Q&A. It crashes as described. See also http://developer.appcelerator.com/question/124936/app-very-unstable-using-17-fine-on-15 \r\n\r\nI'm reposting the reply here:\r\n\r\nI need to, for example, load a given record from a table from various items. So for each item of the list, I do a db.execute, check if the record exists, and close the resultSet. The real app doesn't crash all the time, this code is the reduced version to expose the problem.\r\n\r\nFor me your latest code crashes exactly as I described above.\r\n{noformat}\r\nTi version       Simulator version     Result\r\n----------      ------------------   --------\r\n1.6.2                iOS 4.3            OK\r\n1.7.0                iOS 4.3            Crash\r\n1.7.2                iOS 4.0,4.2,4.3    Crash\r\n1.7.3v20110826161351 iOS 4.3            Crash\r\n{noformat}\r\nWhat are the differences between your environment and mine?\r\n\r\nI'm using:\r\n\r\nTitanium Studio, build: 1.0.4.201108101535 Mac Mini (2.4GHz Intel Core 2 Duo, 4GB RAM) with Mac OS/X 10.6.8 Various versions of the iPhone simulator, as described above",
					"updateAuthor": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"created": "2011-09-02T03:06:45.000+0000",
					"updated": "2011-09-02T03:06:45.000+0000"
				},
				{
					"id": "164898",
					"author": {
						"name": "pdowsett",
						"key": "pdowsett",
						"displayName": "Paul Dowsett",
						"active": true,
						"timeZone": "Europe/London"
					},
					"body": "Proved latest testcase is valid. Other users are reporting same issue.",
					"updateAuthor": {
						"name": "pdowsett",
						"key": "pdowsett",
						"displayName": "Paul Dowsett",
						"active": true,
						"timeZone": "Europe/London"
					},
					"created": "2011-09-02T05:59:24.000+0000",
					"updated": "2011-09-02T05:59:24.000+0000"
				},
				{
					"id": "165200",
					"author": {
						"name": "pdowsett",
						"key": "pdowsett",
						"displayName": "Paul Dowsett",
						"active": true,
						"timeZone": "Europe/London"
					},
					"body": "Another user has provided some test code for this, in duplicate ticket TC-195. Please test with this also, to confirm fix:\r\n\r\nCopy this code into a newly created project\r\n\r\n{code:javascript|title=app.js}\r\nvar num_rows = 100;\r\nvar dbname = 'user_db5.db';\r\nvar db = Titanium.Database.open(dbname);\r\ndb.execute('DROP TABLE IF EXISTS playlist');\r\ndb.execute('CREATE TABLE IF NOT EXISTS playlist (category_id INTEGER KEY PRIMARY KEY)');\r\nfor(var i = 0; i < num_rows; ++i)\r\n{\r\n    db.execute('INSERT INTO playlist(category_id) VALUES(?)', i);           \r\n}\r\ndb.close();\r\nvar win1 = Ti.UI.createWindow({backgroundColor:'blue'});\r\nwin1.addEventListener('focus', function(){\r\n    var db = Titanium.Database.open(dbname);\r\n    for(var j = 0; j < num_rows * 100; ++j)\r\n    {\r\n        var r = j % 100;\r\n        var rows = db.execute('SELECT * FROM playlist WHERE category_id=?', r);\r\n        var id = rows.fieldByName('category_id');\r\n        Ti.API.info('id = ' + id);\r\n        rows.close();\r\n    }\r\n    db.close();\r\n});\r\nvar win2 = Ti.UI.createWindow({backgroundColor:'red'});\r\nvar tab_group = Ti.UI.createTabGroup();\r\ntab_group.addTab(\r\n    Ti.UI.createTab({window:win1})\r\n);\r\ntab_group.addTab(\r\n    Ti.UI.createTab({window:win2})\r\n);\r\ntab_group.open();\r\n{code}\r\n\r\nRun in IOS simulator\r\nSwitch between tabs until crash occurs. \r\nIn Studio the application will just exit, running under XCode gives a EXC_BAD_ACCESS with the following callstack\r\n\r\n{code}\r\n#0  0x002d7bab in _Z4toJSPN2TI10TiExcStateEPK13OpaqueTiValue [inlined] at /Users/stiv/src/appcelerator/tijscore/TiCore/API:75\r\n#1  0x002d7bab in TiObjectSetProperty at /Users/stiv/src/appcelerator/tijscore/TiCore/API/TiObjectRef.cpp:295\r\n#2  0x00056291 in -[KrollObject noteObject:forTiString:context:] at /Users/martinslater/code/EasyLang/mobile/EasyLang Mobile/build/iphone/Classes/KrollObject.m:1302\r\n#3  0x0005155b in KrollGetProperty ()\r\n#4  0x002da7ff in TI::TiCallbackObject<TI::TiObject>::getOwnPropertySlot(TI::TiExcState*, TI::Identifier const&, TI::PropertySlot&) ()\r\n#5  0x002b8b2a in _ZN2TI6TiCell22fastGetOwnPropertySlotEPNS_10TiExcStateERKNS_10IdentifierERNS_12PropertySlotE [inlined] ()\r\n#6  0x002b8b2a in TI::TiValue::get(TI::TiExcState*, TI::Identifier const&, TI::PropertySlot&) const ()\r\n#7  0x002b6126 in cti_op_get_by_id_generic ()\r\n#8  0x0c3f9746 in <????> ()\r\n#9  0x00273415 in TI::Interpreter::execute(TI::FunctionExecutable*, TI::TiExcState*, TI::TiFunction*, TI::TiObject*, TI::ArgList const&, TI::ScopeChainNode*, TI::TiValue*) at /Users/stiv/src/appcelerator/tijscore/TiCore/jit/JITCode.h:84\r\n#10 0x002c4bed in TI::TiFunction::call(TI::TiExcState*, TI::TiValue, TI::ArgList const&) ()\r\n#11 0x0023c30b in TI::call(TI::TiExcState*, TI::TiValue, TI::CallType, TI::CallData const&, TI::TiValue, TI::ArgList const&) ()\r\n#12 0x002d7816 in TiObjectCallAsFunction ()\r\n#13 0x00056d53 in -[KrollObject triggerEvent:withObject:thisObject:] ()\r\n#14 0x000492a1 in -[KrollEvent invoke:] ()\r\n#15 0x0004800d in -[KrollContext invoke:] ()\r\n#16 0x00046bee in -[KrollContext main] ()\r\n#17 0x0067acf4 in -[NSThread main] ()\r\n{code}\r\n\r\nSee [Q&A thread|http://developer.appcelerator.com/question/123951/crash-updating-window-from-focus-event-while-querying-database--ios-43--sdk-172]",
					"updateAuthor": {
						"name": "pdowsett",
						"key": "pdowsett",
						"displayName": "Paul Dowsett",
						"active": true,
						"timeZone": "Europe/London"
					},
					"created": "2011-09-07T07:08:20.000+0000",
					"updated": "2011-09-07T07:08:20.000+0000"
				},
				{
					"id": "165205",
					"author": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"body": "I confirm that the code from ticket TC-195 posted above crashes in the same way, and with the same crash log as the code posted in this ticket.",
					"updateAuthor": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"created": "2011-09-07T07:25:31.000+0000",
					"updated": "2011-09-07T07:25:31.000+0000"
				},
				{
					"id": "165907",
					"author": {
						"name": "srahim",
						"key": "srahim",
						"displayName": "Sabil Rahim",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"body": "Tested both codes on simulator 4.3 and iPhone 4 v 4.3.4 with Titanium SDK Build: 1.8.0.0c3b052 (09/13/11 14:44) and cannot replicate any crash. Please update with a better test case.",
					"updateAuthor": {
						"name": "srahim",
						"key": "srahim",
						"displayName": "Sabil Rahim",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"created": "2011-09-13T15:09:02.000+0000",
					"updated": "2011-09-13T15:09:02.000+0000"
				},
				{
					"id": "165959",
					"author": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"body": "I don't understand, I can reproduce it every time. You can download my project from http://www.megaupload.com/?d=CORMUDY2",
					"updateAuthor": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"created": "2011-09-14T01:51:28.000+0000",
					"updated": "2011-09-14T01:51:28.000+0000"
				},
				{
					"id": "165960",
					"author": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"body": "EDIT: It seems to be fixed in the CI build 1.8.0.v20110912131752. It does crash with the 1.7.x builds.",
					"updateAuthor": {
						"name": "jsilva",
						"key": "jsilva",
						"displayName": "João Silva",
						"active": true,
						"timeZone": "Europe/London"
					},
					"created": "2011-09-14T01:53:37.000+0000",
					"updated": "2011-09-14T04:18:28.000+0000"
				},
				{
					"id": "416509",
					"author": {
						"name": "lmorris",
						"key": "lmorris",
						"displayName": "Lee Morris",
						"active": false,
						"timeZone": "America/Los_Angeles"
					},
					"body": "Closing ticket as I am unable to reproduce the issue using the following environment; \r\niPhone 7 (10.2) \r\nMacOS 10.11.6 (15G31) \r\nStudio 4.8.1.201612050850 \r\nTi SDK 6.0.3 GA \r\nAppc NPM 4.2.8 \r\nAppc CLI 6.1.0 \r\nTi CLI 5.0.11 \r\nAlloy 1.9.5 \r\nArrow 1.10.1 \r\nXcode 8.2 (8C38) \r\nNode v4.6.0 \r\nJava 1.7.0_80",
					"updateAuthor": {
						"name": "lmorris",
						"key": "lmorris",
						"displayName": "Lee Morris",
						"active": false,
						"timeZone": "America/Los_Angeles"
					},
					"created": "2017-03-31T17:28:35.000+0000",
					"updated": "2017-03-31T17:28:35.000+0000"
				}
			],
			"maxResults": 11,
			"total": 11,
			"startAt": 0
		}
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}