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[SR-10793] Unhandled crash on a circular reference within dependencies #4859

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swift-ci opened this issue May 29, 2019 · 3 comments
Open

[SR-10793] Unhandled crash on a circular reference within dependencies #4859

swift-ci opened this issue May 29, 2019 · 3 comments
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bug

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@swift-ci
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Previous ID SR-10793
Radar None
Original Reporter rafiki270 (JIRA User)
Type Bug
Environment

Tested on:
Apple Swift version 5.0.1 (swiftlang-1001.0.82.4 clang-1001.0.46.5)
Target: x86_64-apple-darwin18.6.0

Additional Detail from JIRA
Votes 0
Component/s Package Manager
Labels Bug, Crash
Assignee None
Priority Medium

md5: ca3bb3436957ed856935d8b0dc639be0

Issue Description:

getting following error if I cause a circular reference in my package files:
```
Simultaneous accesses to 0x7fc4cde7bca8, but modification requires exclusive access.
Previous access (a modification) started at swift-package`CacheableSequence.subscript.getter + 614 (0x10ab04026).
Current access (a read) started at:
0 libswiftCore.dylib 0x00007fff6942e140 swift_beginAccess + 557
1 swift-package 0x000000010ab03dc0 CacheableSequence.subscript.getter + 462
2 swift-package 0x000000010ab04480 CacheableSequenceIterator.next() + 150
3 swift-package 0x000000010ab045e0 protocol witness for IteratorProtocol.next() in conformance CacheableSequenceIterator<A> + 16
4 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
5 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
6 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
7 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
8 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
9 libswiftCore.dylib 0x00007fff691fc300 LazyFilterSequence.Iterator.next() + 252
10 libswiftCore.dylib 0x00007fff691fc540 protocol witness for IteratorProtocol.next() in conformance LazyFilterSequence<A>.Iterator + 9
11 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
12 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
13 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
14 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
15 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
16 libswiftCore.dylib 0x00007fff692049d0 FlattenSequence.Iterator.next() + 669
17 libswiftCore.dylib 0x00007fff69204e20 protocol witness for IteratorProtocol.next() in conformance FlattenSequence<A>.Iterator + 9
18 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
19 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
20 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
21 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
22 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
23 libswiftCore.dylib 0x00007fff692049d0 FlattenSequence.Iterator.next() + 844
24 libswiftCore.dylib 0x00007fff69204e20 protocol witness for IteratorProtocol.next() in conformance FlattenSequence<A>.Iterator + 9
25 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
26 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
27 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
28 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
29 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
30 libswiftCore.dylib 0x00007fff692049d0 FlattenSequence.Iterator.next() + 844
31 libswiftCore.dylib 0x00007fff69204e20 protocol witness for IteratorProtocol.next() in conformance FlattenSequence<A>.Iterator + 9
32 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
33 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
34 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
35 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
36 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
37 libswiftCore.dylib 0x00007fff692049d0 FlattenSequence.Iterator.next() + 844
38 libswiftCore.dylib 0x00007fff69204e20 protocol witness for IteratorProtocol.next() in conformance FlattenSequence<A>.Iterator + 9
39 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
40 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
41 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
42 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
43 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
44 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
45 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
46 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
47 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
48 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
49 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
50 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
51 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
52 libswiftCore.dylib 0x00007fff69404610 dispatch thunk of IteratorProtocol.next() + 7
53 swift-package 0x000000010ab03dc0 CacheableSequence.subscript.getter + 700
54 swift-package 0x000000010ab04480 CacheableSequenceIterator.next() + 150
55 swift-package 0x000000010ab045e0 protocol witness for IteratorProtocol.next() in conformance CacheableSequenceIterator<A> + 16
56 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
57 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
58 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
59 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
60 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
61 libswiftCore.dylib 0x00007fff691fc300 LazyFilterSequence.Iterator.next() + 252
62 libswiftCore.dylib 0x00007fff691fc540 protocol witness for IteratorProtocol.next() in conformance LazyFilterSequence<A>.Iterator + 9
63 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
64 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
65 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
66 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
67 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
68 libswiftCore.dylib 0x00007fff692049d0 FlattenSequence.Iterator.next() + 669
69 libswiftCore.dylib 0x00007fff69204e20 protocol witness for IteratorProtocol.next() in conformance FlattenSequence<A>.Iterator + 9
70 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
71 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
72 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
73 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
74 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
75 libswiftCore.dylib 0x00007fff692049d0 FlattenSequence.Iterator.next() + 844
76 libswiftCore.dylib 0x00007fff69204e20 protocol witness for IteratorProtocol.next() in conformance FlattenSequence<A>.Iterator + 9
77 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
78 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
79 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
80 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
81 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
82 libswiftCore.dylib 0x00007fff692049d0 FlattenSequence.Iterator.next() + 844
83 libswiftCore.dylib 0x00007fff69204e20 protocol witness for IteratorProtocol.next() in conformance FlattenSequence<A>.Iterator + 9
84 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
85 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
86 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
87 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
88 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
89 libswiftCore.dylib 0x00007fff692049d0 FlattenSequence.Iterator.next() + 844
90 libswiftCore.dylib 0x00007fff69204e20 protocol witness for IteratorProtocol.next() in conformance FlattenSequence<A>.Iterator + 9
91 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
92 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
93 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
94 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
95 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
96 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
97 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
98 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
99 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
100 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
101 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
102 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
103 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
104 libswiftCore.dylib 0x00007fff69404610 dispatch thunk of IteratorProtocol.next() + 7
105 swift-package 0x000000010ab03dc0 CacheableSequence.subscript.getter + 700
106 swift-package 0x000000010ab04480 CacheableSequenceIterator.next() + 150
107 swift-package 0x000000010ab045e0 protocol witness for IteratorProtocol.next() in conformance CacheableSequenceIterator<A> + 16
108 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
109 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
110 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
111 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
112 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
113 libswiftCore.dylib 0x00007fff691fc300 LazyFilterSequence.Iterator.next() + 252
114 libswiftCore.dylib 0x00007fff691fc540 protocol witness for IteratorProtocol.next() in conformance LazyFilterSequence<A>.Iterator + 9
115 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
116 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
117 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
118 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
119 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
120 libswiftCore.dylib 0x00007fff692049d0 FlattenSequence.Iterator.next() + 669
121 libswiftCore.dylib 0x00007fff69204e20 protocol witness for IteratorProtocol.next() in conformance FlattenSequence<A>.Iterator + 9
122 libswiftCore.dylib 0x00007fff69321f00 _IteratorBox.next() + 26
123 libswiftCore.dylib 0x00007fff691ce300 AnyIterator.next() + 16
124 libswiftCore.dylib 0x00007fff69321d40 protocol witness for IteratorProtocol.next() in conformance AnyIterator<A> + 13
125 libswiftCore.dylib 0x00007fff69290f50 LazyMapSequence.Iterator.next() + 241
126 libswiftCore.dylib 0x00007fff69291120 protocol witness for IteratorProtocol.next() in conformance LazyMapSequence<A, B>.Iterator + 9
Fatal access conflict detected.```
@weissi
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weissi commented May 30, 2019

Cc @aciidb0mb3r

@swift-ci
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Comment by Ondrej Rafaj (JIRA)

Sorry for the massive repo but you can simulate the problem easily on this branch:
https://github.com/LiveUI/ApiCore/tree/SR-10793

This line:
https://github.com/LiveUI/ApiCore/blob/c40c5ebf26f2776634d734f5d895ffde9985fca4/Package.swift#L15

@ankitspd
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Can you try the latest trunk snapshot? I think we fixed this one.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 4, 2022
@tomerd tomerd removed Crash labels May 14, 2022
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