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Merged
hvitved merged 3 commits into from
Oct 7, 2022
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Ruby: Take overrides into account for singleton methods defined on modules #10705

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Ruby: Add more call graph tests
hvitved Oct 6, 2022
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Ruby: Take overrides into account for singleton methods defined on mo…
hvitved Oct 6, 2022
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Ruby: Add ql doc to `lookupSingletonMethod`
hvitved Oct 7, 2022
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27 changes: 25 additions & 2 deletions ruby/ql/lib/codeql/ruby/dataflow/internal/DataFlowDispatch.qll
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Original file line number Diff line number Diff line change
Expand Up @@ -389,7 +389,7 @@ private module Cached {
// ```
exists(DataFlow::Node sourceNode, Module m |
flowsToMethodCall(call, sourceNode, method) and
singletonMethodOnModule(result, method, m)
result = lookupSingletonMethod(m, method)
|
// ```rb
// def C.singleton; end # <- result
Expand Down Expand Up @@ -725,14 +725,37 @@ private predicate singletonMethodOnModule(MethodBase method, string name, Module
selfInModule(object.(SelfVariableReadAccess).getVariable(), m)
)
or
flowsToSingletonMethodObject(trackModuleAccess(m), method, name)
exists(DataFlow::LocalSourceNode sourceNode |
m = resolveConstantReadAccess(sourceNode.asExpr().getExpr()) and
flowsToSingletonMethodObject(sourceNode, method, name)
)
or
exists(Module other |
extendCallModule(m, other) and
method = lookupMethod(other, name)
)
}

/**
* Holds if `method` is a singleton method named `name`, defined on module
* `m`, or any transitive base class of `m`.
*/
pragma[nomagic]
private MethodBase lookupSingletonMethod(Module m, string name) {
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@asgerf asgerf Oct 7, 2022

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Could you add some QLDoc indicating that this takes inheritance into account, and likewise on singletonMethodOnModule.

I'd probably have named these predicates in a way that clarifies their relationship, such as:

  • lookupOwnSingletonMethod
  • lookupSingletonMethod

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@hvitved hvitved Oct 7, 2022

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I simply used the naming after the existing lookupMethod predicate for instance methods. I'll add ql doc.

singletonMethodOnModule(result, name, m)
or
// cannot be part of `singletonMethodOnModule` because it would introduce
// negative recursion below
exists(DataFlow::LocalSourceNode sourceNode |
sourceNode = trackModuleAccess(m) and
not m = resolveConstantReadAccess(sourceNode.asExpr().getExpr()) and
flowsToSingletonMethodObject(sourceNode, result, name)
)
or
not singletonMethodOnModule(_, name, m) and
result = lookupSingletonMethod(m.getSuperClass(), name)
}

/**
* Holds if `method` is a singleton method named `name`, defined on expression
* `object`, where `object` is not likely to resolve to a module:
Expand Down
16 changes: 8 additions & 8 deletions ruby/ql/test/library-tests/modules/ancestors.expected
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Expand Up @@ -89,25 +89,25 @@ calls.rb:
# 377| SingletonOverride1
#-----| super -> Object

# 402| SingletonOverride2
# 404| SingletonOverride2
#-----| super -> SingletonOverride1

# 417| ConditionalInstanceMethods
# 421| ConditionalInstanceMethods
#-----| super -> Object

# 480| ExtendSingletonMethod
# 484| ExtendSingletonMethod

# 490| ExtendSingletonMethod2
# 494| ExtendSingletonMethod2

# 496| ExtendSingletonMethod3
# 500| ExtendSingletonMethod3

# 509| ProtectedMethodInModule
# 513| ProtectedMethodInModule

# 515| ProtectedMethods
# 519| ProtectedMethods
#-----| super -> Object
#-----| include -> ProtectedMethodInModule

# 534| ProtectedMethodsSub
# 538| ProtectedMethodsSub
#-----| super -> ProtectedMethods

hello.rb:
Expand Down
222 changes: 113 additions & 109 deletions ruby/ql/test/library-tests/modules/callgraph.expected
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Original file line number Diff line number Diff line change
Expand Up @@ -148,67 +148,73 @@ getTarget
| calls.rb:375:1:375:11 | call to instance | calls.rb:368:5:370:7 | instance |
| calls.rb:380:13:380:48 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:384:13:384:22 | call to singleton1 | calls.rb:379:9:381:11 | singleton1 |
| calls.rb:384:13:384:22 | call to singleton1 | calls.rb:404:9:406:11 | singleton1 |
| calls.rb:384:13:384:22 | call to singleton1 | calls.rb:406:9:408:11 | singleton1 |
| calls.rb:389:9:389:44 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:393:9:393:18 | call to singleton2 | calls.rb:388:5:390:7 | singleton2 |
| calls.rb:393:9:393:18 | call to singleton2 | calls.rb:409:5:411:7 | singleton2 |
| calls.rb:393:9:393:18 | call to singleton2 | calls.rb:411:5:413:7 | singleton2 |
| calls.rb:396:5:396:14 | call to singleton2 | calls.rb:388:5:390:7 | singleton2 |
| calls.rb:399:1:399:34 | call to call_singleton1 | calls.rb:383:9:385:11 | call_singleton1 |
| calls.rb:400:1:400:34 | call to call_singleton2 | calls.rb:392:5:394:7 | call_singleton2 |
| calls.rb:405:13:405:48 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:410:9:410:44 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:420:13:420:48 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:425:9:425:44 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:428:13:428:48 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:431:17:431:52 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:439:9:443:11 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:439:9:443:15 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:441:17:441:40 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:447:1:447:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:447:1:447:33 | call to m1 | calls.rb:419:9:421:11 | m1 |
| calls.rb:448:1:448:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:449:1:449:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:449:1:449:33 | call to m2 | calls.rb:424:5:436:7 | m2 |
| calls.rb:450:1:450:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:399:1:399:29 | call to singleton1 | calls.rb:379:9:381:11 | singleton1 |
| calls.rb:400:1:400:29 | call to singleton2 | calls.rb:388:5:390:7 | singleton2 |
| calls.rb:401:1:401:34 | call to call_singleton1 | calls.rb:383:9:385:11 | call_singleton1 |
| calls.rb:402:1:402:34 | call to call_singleton2 | calls.rb:392:5:394:7 | call_singleton2 |
| calls.rb:407:13:407:48 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:412:9:412:44 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:416:1:416:29 | call to singleton1 | calls.rb:406:9:408:11 | singleton1 |
| calls.rb:417:1:417:29 | call to singleton2 | calls.rb:411:5:413:7 | singleton2 |
| calls.rb:418:1:418:34 | call to call_singleton1 | calls.rb:383:9:385:11 | call_singleton1 |
| calls.rb:419:1:419:34 | call to call_singleton2 | calls.rb:392:5:394:7 | call_singleton2 |
| calls.rb:424:13:424:48 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:429:9:429:44 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:432:13:432:48 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:435:17:435:52 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:443:9:447:11 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:443:9:447:15 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:445:17:445:40 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:451:1:451:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:451:1:451:33 | call to m1 | calls.rb:423:9:425:11 | m1 |
| calls.rb:452:1:452:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:454:27:472:3 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:457:13:457:22 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:461:5:465:7 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:461:5:465:11 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:463:13:463:22 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:469:13:469:27 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:474:1:474:27 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:475:1:475:27 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:476:1:476:27 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:477:1:477:27 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:453:1:453:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:453:1:453:33 | call to m2 | calls.rb:428:5:440:7 | m2 |
| calls.rb:454:1:454:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:455:1:455:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:456:1:456:30 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:458:27:476:3 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:461:13:461:22 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:465:5:469:7 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:465:5:469:11 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:467:13:467:22 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:473:13:473:27 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:478:1:478:27 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:488:1:488:31 | call to singleton | calls.rb:481:5:483:7 | singleton |
| calls.rb:494:1:494:32 | call to singleton | calls.rb:481:5:483:7 | singleton |
| calls.rb:501:1:501:32 | call to singleton | calls.rb:481:5:483:7 | singleton |
| calls.rb:507:1:507:13 | call to singleton | calls.rb:481:5:483:7 | singleton |
| calls.rb:516:5:516:35 | call to include | calls.rb:108:5:110:7 | include |
| calls.rb:519:9:519:35 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:523:9:523:11 | call to foo | calls.rb:510:15:512:7 | foo |
| calls.rb:524:9:524:11 | call to bar | calls.rb:518:15:520:7 | bar |
| calls.rb:525:9:525:28 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:525:9:525:32 | call to foo | calls.rb:510:15:512:7 | foo |
| calls.rb:526:9:526:28 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:526:9:526:32 | call to bar | calls.rb:518:15:520:7 | bar |
| calls.rb:530:1:530:20 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:531:1:531:20 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:532:1:532:20 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:532:1:532:24 | call to baz | calls.rb:522:5:527:7 | baz |
| calls.rb:536:9:536:11 | call to foo | calls.rb:510:15:512:7 | foo |
| calls.rb:537:9:537:31 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:537:9:537:35 | call to foo | calls.rb:510:15:512:7 | foo |
| calls.rb:541:1:541:23 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:542:1:542:23 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:543:1:543:23 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:543:1:543:27 | call to baz | calls.rb:535:5:538:7 | baz |
| calls.rb:545:2:545:6 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:545:20:545:24 | call to baz | calls.rb:51:5:57:7 | baz |
| calls.rb:546:26:546:37 | call to capitalize | calls.rb:97:5:97:23 | capitalize |
| calls.rb:479:1:479:27 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:480:1:480:27 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:481:1:481:27 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:482:1:482:27 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:492:1:492:31 | call to singleton | calls.rb:485:5:487:7 | singleton |
| calls.rb:498:1:498:32 | call to singleton | calls.rb:485:5:487:7 | singleton |
| calls.rb:505:1:505:32 | call to singleton | calls.rb:485:5:487:7 | singleton |
| calls.rb:511:1:511:13 | call to singleton | calls.rb:485:5:487:7 | singleton |
| calls.rb:520:5:520:35 | call to include | calls.rb:108:5:110:7 | include |
| calls.rb:523:9:523:35 | call to puts | calls.rb:102:5:102:30 | puts |
| calls.rb:527:9:527:11 | call to foo | calls.rb:514:15:516:7 | foo |
| calls.rb:528:9:528:11 | call to bar | calls.rb:522:15:524:7 | bar |
| calls.rb:529:9:529:28 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:529:9:529:32 | call to foo | calls.rb:514:15:516:7 | foo |
| calls.rb:530:9:530:28 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:530:9:530:32 | call to bar | calls.rb:522:15:524:7 | bar |
| calls.rb:534:1:534:20 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:535:1:535:20 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:536:1:536:20 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:536:1:536:24 | call to baz | calls.rb:526:5:531:7 | baz |
| calls.rb:540:9:540:11 | call to foo | calls.rb:514:15:516:7 | foo |
| calls.rb:541:9:541:31 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:541:9:541:35 | call to foo | calls.rb:514:15:516:7 | foo |
| calls.rb:545:1:545:23 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:546:1:546:23 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:547:1:547:23 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:547:1:547:27 | call to baz | calls.rb:539:5:542:7 | baz |
| calls.rb:549:2:549:6 | call to new | calls.rb:117:5:117:16 | new |
| calls.rb:549:20:549:24 | call to baz | calls.rb:51:5:57:7 | baz |
| calls.rb:550:26:550:37 | call to capitalize | calls.rb:97:5:97:23 | capitalize |
| hello.rb:12:5:12:24 | call to include | calls.rb:108:5:110:7 | include |
| hello.rb:14:16:14:20 | call to hello | hello.rb:2:5:4:7 | hello |
| hello.rb:20:16:20:20 | call to super | hello.rb:13:5:15:7 | message |
Expand Down Expand Up @@ -286,46 +292,44 @@ unresolvedCall
| calls.rb:274:1:274:14 | call to singleton_g |
| calls.rb:276:1:276:14 | call to singleton_g |
| calls.rb:313:9:313:20 | call to instance |
| calls.rb:414:1:414:34 | call to call_singleton1 |
| calls.rb:415:1:415:34 | call to call_singleton2 |
| calls.rb:418:8:418:13 | call to rand |
| calls.rb:418:8:418:17 | ... > ... |
| calls.rb:435:9:435:10 | call to m3 |
| calls.rb:438:8:438:13 | call to rand |
| calls.rb:438:8:438:17 | ... > ... |
| calls.rb:439:9:443:18 | call to m5 |
| calls.rb:448:1:448:33 | call to m3 |
| calls.rb:450:1:450:33 | call to m3 |
| calls.rb:451:1:451:33 | call to m4 |
| calls.rb:452:1:452:33 | call to m5 |
| calls.rb:455:5:455:11 | call to [] |
| calls.rb:455:5:459:7 | call to each |
| calls.rb:461:5:465:15 | call to bar |
| calls.rb:467:5:467:11 | call to [] |
| calls.rb:467:5:471:7 | call to each |
| calls.rb:468:9:470:11 | call to define_method |
| calls.rb:474:1:474:31 | call to foo |
| calls.rb:475:1:475:31 | call to bar |
| calls.rb:476:1:476:33 | call to baz_0 |
| calls.rb:477:1:477:33 | call to baz_1 |
| calls.rb:478:1:478:33 | call to baz_2 |
| calls.rb:482:9:482:46 | call to puts |
| calls.rb:485:5:485:15 | call to extend |
| calls.rb:491:5:491:32 | call to extend |
| calls.rb:499:1:499:51 | call to extend |
| calls.rb:504:1:504:13 | call to singleton |
| calls.rb:505:1:505:32 | call to extend |
| calls.rb:510:5:512:7 | call to protected |
| calls.rb:511:9:511:42 | call to puts |
| calls.rb:518:5:520:7 | call to protected |
| calls.rb:530:1:530:24 | call to foo |
| calls.rb:531:1:531:24 | call to bar |
| calls.rb:541:1:541:27 | call to foo |
| calls.rb:542:1:542:27 | call to bar |
| calls.rb:545:1:545:7 | call to [] |
| calls.rb:545:1:545:26 | call to each |
| calls.rb:546:1:546:13 | call to [] |
| calls.rb:546:1:546:39 | call to each |
| calls.rb:422:8:422:13 | call to rand |
| calls.rb:422:8:422:17 | ... > ... |
| calls.rb:439:9:439:10 | call to m3 |
| calls.rb:442:8:442:13 | call to rand |
| calls.rb:442:8:442:17 | ... > ... |
| calls.rb:443:9:447:18 | call to m5 |
| calls.rb:452:1:452:33 | call to m3 |
| calls.rb:454:1:454:33 | call to m3 |
| calls.rb:455:1:455:33 | call to m4 |
| calls.rb:456:1:456:33 | call to m5 |
| calls.rb:459:5:459:11 | call to [] |
| calls.rb:459:5:463:7 | call to each |
| calls.rb:465:5:469:15 | call to bar |
| calls.rb:471:5:471:11 | call to [] |
| calls.rb:471:5:475:7 | call to each |
| calls.rb:472:9:474:11 | call to define_method |
| calls.rb:478:1:478:31 | call to foo |
| calls.rb:479:1:479:31 | call to bar |
| calls.rb:480:1:480:33 | call to baz_0 |
| calls.rb:481:1:481:33 | call to baz_1 |
| calls.rb:482:1:482:33 | call to baz_2 |
| calls.rb:486:9:486:46 | call to puts |
| calls.rb:489:5:489:15 | call to extend |
| calls.rb:495:5:495:32 | call to extend |
| calls.rb:503:1:503:51 | call to extend |
| calls.rb:508:1:508:13 | call to singleton |
| calls.rb:509:1:509:32 | call to extend |
| calls.rb:514:5:516:7 | call to protected |
| calls.rb:515:9:515:42 | call to puts |
| calls.rb:522:5:524:7 | call to protected |
| calls.rb:534:1:534:24 | call to foo |
| calls.rb:535:1:535:24 | call to bar |
| calls.rb:545:1:545:27 | call to foo |
| calls.rb:546:1:546:27 | call to bar |
| calls.rb:549:1:549:7 | call to [] |
| calls.rb:549:1:549:26 | call to each |
| calls.rb:550:1:550:13 | call to [] |
| calls.rb:550:1:550:39 | call to each |
| hello.rb:20:16:20:26 | ... + ... |
| hello.rb:20:16:20:34 | ... + ... |
| hello.rb:20:16:20:40 | ... + ... |
Expand All @@ -351,8 +355,8 @@ privateMethod
| calls.rb:278:1:286:3 | create |
| calls.rb:343:1:359:3 | pattern_dispatch |
| calls.rb:367:1:371:3 | add_singleton |
| calls.rb:456:9:458:11 | foo |
| calls.rb:462:9:464:11 | bar |
| calls.rb:460:9:462:11 | foo |
| calls.rb:466:9:468:11 | bar |
| private.rb:2:11:3:5 | private1 |
| private.rb:8:3:9:5 | private2 |
| private.rb:14:3:15:5 | private3 |
Expand Down Expand Up @@ -417,16 +421,16 @@ publicMethod
| calls.rb:383:9:385:11 | call_singleton1 |
| calls.rb:388:5:390:7 | singleton2 |
| calls.rb:392:5:394:7 | call_singleton2 |
| calls.rb:404:9:406:11 | singleton1 |
| calls.rb:409:5:411:7 | singleton2 |
| calls.rb:419:9:421:11 | m1 |
| calls.rb:424:5:436:7 | m2 |
| calls.rb:427:9:433:11 | m3 |
| calls.rb:430:13:432:15 | m4 |
| calls.rb:440:13:442:15 | m5 |
| calls.rb:481:5:483:7 | singleton |
| calls.rb:522:5:527:7 | baz |
| calls.rb:535:5:538:7 | baz |
| calls.rb:406:9:408:11 | singleton1 |
| calls.rb:411:5:413:7 | singleton2 |
| calls.rb:423:9:425:11 | m1 |
| calls.rb:428:5:440:7 | m2 |
| calls.rb:431:9:437:11 | m3 |
| calls.rb:434:13:436:15 | m4 |
| calls.rb:444:13:446:15 | m5 |
| calls.rb:485:5:487:7 | singleton |
| calls.rb:526:5:531:7 | baz |
| calls.rb:539:5:542:7 | baz |
| hello.rb:2:5:4:7 | hello |
| hello.rb:5:5:7:7 | world |
| hello.rb:13:5:15:7 | message |
Expand All @@ -443,7 +447,7 @@ publicMethod
| private.rb:66:3:67:5 | public |
| private.rb:91:3:93:5 | call_m1 |
protectedMethod
| calls.rb:510:15:512:7 | foo |
| calls.rb:518:15:520:7 | bar |
| calls.rb:514:15:516:7 | foo |
| calls.rb:522:15:524:7 | bar |
| private.rb:32:3:33:5 | protected1 |
| private.rb:35:3:36:5 | protected2 |
4 changes: 4 additions & 0 deletions ruby/ql/test/library-tests/modules/calls.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -396,6 +396,8 @@ def self.call_singleton2
singleton2
end

SingletonOverride1.singleton1
SingletonOverride1.singleton2
SingletonOverride1.call_singleton1
SingletonOverride1.call_singleton2

Expand All @@ -411,6 +413,8 @@ def self.singleton2
end
end

SingletonOverride2.singleton1
SingletonOverride2.singleton2
SingletonOverride2.call_singleton1
SingletonOverride2.call_singleton2

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