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Data flow: Rework reverse flow through parameters #18109

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6485bf5
Data flow: Change `toString` for parameter return nodes
hvitved Dec 6, 2024
9d7029c
C#: Add tests for missing reverse flow
hvitved Nov 22, 2024
77b34c1
Data flow: Rework reverse flow through parameters
hvitved Dec 5, 2024
283d61d
C++: Update expected test output
hvitved Dec 9, 2024
9435a6f
C#: Update expected test output
hvitved Dec 9, 2024
b8d32b1
Go: Update expected test output
hvitved Dec 9, 2024
e6e8eb7
Java: Update expected test output
hvitved Dec 9, 2024
5462dc1
Ruby: Update expected test output
hvitved Dec 9, 2024
e728f70
Swift: Update expected test output
hvitved Dec 9, 2024
828ba23
Disable reverse flow through stores
hvitved Dec 13, 2024
e7df00a
Data flow: Move `FlowThrough` module into `TypeTrackingInput`
hvitved Dec 13, 2024
d84ca39
wip
hvitved Dec 16, 2024
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2 changes: 1 addition & 1 deletion cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowPrivate.qll
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Expand Up @@ -1436,7 +1436,7 @@ private predicate localFlowStepWithSummaries(Node node1, Node node2) {
or
readStep(node1, _, node2)
or
DataFlowImplCommon::argumentValueFlowsThrough(node1, _, node2, _)
DataFlowImplCommon::argumentValueFlowsThroughExposedForCppOnly(node1, _, node2, _)
}

/** Holds if `node` flows to a node that is used in a `SwitchInstruction`. */
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4 changes: 2 additions & 2 deletions cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/ProductFlow.qll
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Expand Up @@ -546,7 +546,7 @@ module ProductFlow {
Flow1::PathGraph::edges(pred1, succ1, _, _) and
exists(ReturnKindExt returnKind |
succ1.getNode() = getAnOutNodeExt(call, returnKind) and
returnKind = getParamReturnPosition(_, pred1.asParameterReturnNode()).getKind()
returnKind = getParamReturnPosition(pred1.asParameterReturnNode()).getKind()
)
}

Expand Down Expand Up @@ -574,7 +574,7 @@ module ProductFlow {
Flow2::PathGraph::edges(pred2, succ2, _, _) and
exists(ReturnKindExt returnKind |
succ2.getNode() = getAnOutNodeExt(call, returnKind) and
returnKind = getParamReturnPosition(_, pred2.asParameterReturnNode()).getKind()
returnKind = getParamReturnPosition(pred2.asParameterReturnNode()).getKind()
)
}

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98 changes: 90 additions & 8 deletions ...erimental/query-tests/Security/CWE/CWE-409/DecompressionBombs/DecompressionBombs.expected
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335 changes: 207 additions & 128 deletions cpp/ql/test/library-tests/dataflow/fields/ir-path-flow.expected
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324 changes: 181 additions & 143 deletions cpp/ql/test/library-tests/dataflow/fields/path-flow.expected
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12 changes: 6 additions & 6 deletions cpp/ql/test/query-tests/Security/CWE/CWE-078/semmle/ExecTainted/ExecTainted.expected
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Expand Up @@ -51,8 +51,8 @@ edges
| test.cpp:187:18:187:25 | *filename | test.cpp:187:11:187:15 | strncat output argument | provenance | TaintFunction |
| test.cpp:188:11:188:17 | strncat output argument | test.cpp:186:19:186:25 | *command | provenance | |
| test.cpp:188:11:188:17 | strncat output argument | test.cpp:186:19:186:25 | *command | provenance | |
| test.cpp:188:11:188:17 | strncat output argument | test.cpp:186:19:186:25 | *command [Return] | provenance | |
| test.cpp:188:11:188:17 | strncat output argument | test.cpp:186:19:186:25 | *command [Return] | provenance | |
| test.cpp:188:11:188:17 | strncat output argument | test.cpp:186:19:186:25 | *command [Reverse] | provenance | |
| test.cpp:188:11:188:17 | strncat output argument | test.cpp:186:19:186:25 | *command [Reverse] | provenance | |
| test.cpp:188:20:188:24 | *flags | test.cpp:188:11:188:17 | strncat output argument | provenance | Config |
| test.cpp:188:20:188:24 | *flags | test.cpp:188:11:188:17 | strncat output argument | provenance | TaintFunction |
| test.cpp:194:9:194:16 | fread output argument | test.cpp:196:26:196:33 | *filename | provenance | |
Expand Down Expand Up @@ -127,8 +127,8 @@ nodes
| test.cpp:183:32:183:38 | *command | semmle.label | *command |
| test.cpp:186:19:186:25 | *command | semmle.label | *command |
| test.cpp:186:19:186:25 | *command | semmle.label | *command |
| test.cpp:186:19:186:25 | *command [Return] | semmle.label | *command [Return] |
| test.cpp:186:19:186:25 | *command [Return] | semmle.label | *command [Return] |
| test.cpp:186:19:186:25 | *command [Reverse] | semmle.label | *command [Reverse] |
| test.cpp:186:19:186:25 | *command [Reverse] | semmle.label | *command [Reverse] |
| test.cpp:186:47:186:54 | *filename | semmle.label | *filename |
| test.cpp:187:11:187:15 | strncat output argument | semmle.label | strncat output argument |
| test.cpp:187:11:187:15 | strncat output argument | semmle.label | strncat output argument |
Expand All @@ -155,8 +155,8 @@ nodes
subpaths
| test.cpp:196:26:196:33 | *filename | test.cpp:186:47:186:54 | *filename | test.cpp:186:19:186:25 | *command | test.cpp:196:10:196:16 | concat output argument |
| test.cpp:196:26:196:33 | *filename | test.cpp:186:47:186:54 | *filename | test.cpp:186:19:186:25 | *command | test.cpp:196:10:196:16 | concat output argument |
| test.cpp:196:26:196:33 | *filename | test.cpp:186:47:186:54 | *filename | test.cpp:186:19:186:25 | *command [Return] | test.cpp:196:10:196:16 | concat output argument |
| test.cpp:196:26:196:33 | *filename | test.cpp:186:47:186:54 | *filename | test.cpp:186:19:186:25 | *command [Return] | test.cpp:196:10:196:16 | concat output argument |
| test.cpp:196:26:196:33 | *filename | test.cpp:186:47:186:54 | *filename | test.cpp:186:19:186:25 | *command [Reverse] | test.cpp:196:10:196:16 | concat output argument |
| test.cpp:196:26:196:33 | *filename | test.cpp:186:47:186:54 | *filename | test.cpp:186:19:186:25 | *command [Reverse] | test.cpp:196:10:196:16 | concat output argument |
#select
| test.cpp:23:12:23:19 | command1 | test.cpp:15:27:15:30 | **argv | test.cpp:23:12:23:19 | *command1 | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:15:27:15:30 | **argv | user input (a command-line argument) | test.cpp:22:13:22:20 | sprintf output argument | sprintf output argument |
| test.cpp:51:10:51:16 | command | test.cpp:47:21:47:26 | *call to getenv | test.cpp:51:10:51:16 | *command | This argument to an OS command is derived from $@, dangerously concatenated into $@, and then passed to system(string). | test.cpp:47:21:47:26 | *call to getenv | user input (an environment variable) | test.cpp:50:11:50:17 | sprintf output argument | sprintf output argument |
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6 changes: 3 additions & 3 deletions cpp/ql/test/query-tests/Security/CWE/CWE-119/SAMATE/OverrunWriteProductFlow.expected
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Expand Up @@ -53,7 +53,7 @@ edges
| test.cpp:228:27:228:54 | call to malloc | test.cpp:228:27:228:54 | call to malloc | provenance | |
| test.cpp:228:27:228:54 | call to malloc | test.cpp:232:10:232:15 | buffer | provenance | |
| test.cpp:235:40:235:45 | buffer | test.cpp:236:5:236:26 | ... = ... | provenance | |
| test.cpp:236:5:236:9 | *p_str [post update] [string] | test.cpp:235:27:235:31 | *p_str [Return] [string] | provenance | |
| test.cpp:236:5:236:9 | *p_str [post update] [string] | test.cpp:235:27:235:31 | *p_str [Reverse] [string] | provenance | |
| test.cpp:236:5:236:9 | *p_str [post update] [string] | test.cpp:235:27:235:31 | *p_str [string] | provenance | |
| test.cpp:236:5:236:26 | ... = ... | test.cpp:236:5:236:9 | *p_str [post update] [string] | provenance | |
| test.cpp:241:20:241:38 | call to malloc | test.cpp:241:20:241:38 | call to malloc | provenance | |
Expand Down Expand Up @@ -129,7 +129,7 @@ nodes
| test.cpp:228:27:228:54 | call to malloc | semmle.label | call to malloc |
| test.cpp:228:27:228:54 | call to malloc | semmle.label | call to malloc |
| test.cpp:232:10:232:15 | buffer | semmle.label | buffer |
| test.cpp:235:27:235:31 | *p_str [Return] [string] | semmle.label | *p_str [Return] [string] |
| test.cpp:235:27:235:31 | *p_str [Reverse] [string] | semmle.label | *p_str [Reverse] [string] |
| test.cpp:235:27:235:31 | *p_str [string] | semmle.label | *p_str [string] |
| test.cpp:235:40:235:45 | buffer | semmle.label | buffer |
| test.cpp:236:5:236:9 | *p_str [post update] [string] | semmle.label | *p_str [post update] [string] |
Expand All @@ -152,7 +152,7 @@ nodes
| test.cpp:264:13:264:30 | call to malloc | semmle.label | call to malloc |
| test.cpp:266:12:266:12 | p | semmle.label | p |
subpaths
| test.cpp:242:22:242:27 | buffer | test.cpp:235:40:235:45 | buffer | test.cpp:235:27:235:31 | *p_str [Return] [string] | test.cpp:242:16:242:19 | set_string output argument [string] |
| test.cpp:242:22:242:27 | buffer | test.cpp:235:40:235:45 | buffer | test.cpp:235:27:235:31 | *p_str [Reverse] [string] | test.cpp:242:16:242:19 | set_string output argument [string] |
| test.cpp:242:22:242:27 | buffer | test.cpp:235:40:235:45 | buffer | test.cpp:235:27:235:31 | *p_str [string] | test.cpp:242:16:242:19 | set_string output argument [string] |
#select
| test.cpp:42:5:42:11 | call to strncpy | test.cpp:18:19:18:24 | call to malloc | test.cpp:42:18:42:23 | string | This write may overflow $@ by 1 element. | test.cpp:42:18:42:23 | string | string |
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6 changes: 3 additions & 3 deletions cpp/ql/test/query-tests/Security/CWE/CWE-497/semmle/tests/ExposedSystemData.expected
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Expand Up @@ -12,7 +12,7 @@ edges
| tests2.cpp:111:14:111:15 | *c1 [*ptr] | tests2.cpp:111:14:111:19 | *ptr | provenance | |
| tests2.cpp:111:14:111:15 | *c1 [*ptr] | tests2.cpp:111:17:111:19 | *ptr | provenance | |
| tests2.cpp:111:17:111:19 | *ptr | tests2.cpp:111:14:111:19 | *ptr | provenance | |
| tests2.cpp:120:5:120:21 | [summary param] *1 in zmq_msg_init_data | tests2.cpp:120:5:120:21 | [summary param] *0 in zmq_msg_init_data [Return] | provenance | |
| tests2.cpp:120:5:120:21 | [summary param] *1 in zmq_msg_init_data | tests2.cpp:120:5:120:21 | [summary param] *0 in zmq_msg_init_data [Reverse] | provenance | |
| tests2.cpp:134:2:134:30 | *... = ... | tests2.cpp:138:23:138:34 | *message_data | provenance | |
| tests2.cpp:134:2:134:30 | *... = ... | tests2.cpp:143:34:143:45 | *message_data | provenance | |
| tests2.cpp:134:17:134:22 | *call to getenv | tests2.cpp:134:2:134:30 | *... = ... | provenance | |
Expand Down Expand Up @@ -52,7 +52,7 @@ nodes
| tests2.cpp:111:14:111:15 | *c1 [*ptr] | semmle.label | *c1 [*ptr] |
| tests2.cpp:111:14:111:19 | *ptr | semmle.label | *ptr |
| tests2.cpp:111:17:111:19 | *ptr | semmle.label | *ptr |
| tests2.cpp:120:5:120:21 | [summary param] *0 in zmq_msg_init_data [Return] | semmle.label | [summary param] *0 in zmq_msg_init_data [Return] |
| tests2.cpp:120:5:120:21 | [summary param] *0 in zmq_msg_init_data [Reverse] | semmle.label | [summary param] *0 in zmq_msg_init_data [Reverse] |
| tests2.cpp:120:5:120:21 | [summary param] *1 in zmq_msg_init_data | semmle.label | [summary param] *1 in zmq_msg_init_data |
| tests2.cpp:134:2:134:30 | *... = ... | semmle.label | *... = ... |
| tests2.cpp:134:17:134:22 | *call to getenv | semmle.label | *call to getenv |
Expand All @@ -74,7 +74,7 @@ nodes
| tests_sysconf.cpp:36:21:36:27 | confstr output argument | semmle.label | confstr output argument |
| tests_sysconf.cpp:39:19:39:25 | *pathbuf | semmle.label | *pathbuf |
subpaths
| tests2.cpp:143:34:143:45 | *message_data | tests2.cpp:120:5:120:21 | [summary param] *1 in zmq_msg_init_data | tests2.cpp:120:5:120:21 | [summary param] *0 in zmq_msg_init_data [Return] | tests2.cpp:143:24:143:31 | zmq_msg_init_data output argument |
| tests2.cpp:143:34:143:45 | *message_data | tests2.cpp:120:5:120:21 | [summary param] *1 in zmq_msg_init_data | tests2.cpp:120:5:120:21 | [summary param] *0 in zmq_msg_init_data [Reverse] | tests2.cpp:143:24:143:31 | zmq_msg_init_data output argument |
#select
| tests2.cpp:63:13:63:26 | *call to getenv | tests2.cpp:63:13:63:26 | *call to getenv | tests2.cpp:63:13:63:26 | *call to getenv | This operation exposes system data from $@. | tests2.cpp:63:13:63:26 | *call to getenv | *call to getenv |
| tests2.cpp:64:13:64:26 | *call to getenv | tests2.cpp:64:13:64:26 | *call to getenv | tests2.cpp:64:13:64:26 | *call to getenv | This operation exposes system data from $@. | tests2.cpp:64:13:64:26 | *call to getenv | *call to getenv |
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12 changes: 6 additions & 6 deletions csharp/ql/test/library-tests/dataflow/collections/CollectionFlow.expected
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Expand Up @@ -253,7 +253,7 @@ edges
| CollectionFlow.cs:309:21:309:23 | kvp : KeyValuePair<A,Int32> [property Key] : A | CollectionFlow.cs:311:18:311:20 | access to parameter kvp : KeyValuePair<A,Int32> [property Key] : A | provenance | |
| CollectionFlow.cs:311:18:311:20 | access to parameter kvp : KeyValuePair<A,Int32> [property Key] : A | CollectionFlow.cs:311:18:311:24 | access to property Key | provenance | |
| CollectionFlow.cs:328:32:328:38 | element : A | CollectionFlow.cs:328:55:328:61 | access to parameter element : A | provenance | |
| CollectionFlow.cs:328:44:328:48 | [post] access to parameter array : A[] [element] : A | CollectionFlow.cs:328:23:328:27 | array [Return] : A[] [element] : A | provenance | |
| CollectionFlow.cs:328:44:328:48 | [post] access to parameter array : A[] [element] : A | CollectionFlow.cs:328:23:328:27 | array [Reverse] : A[] [element] : A | provenance | |
| CollectionFlow.cs:328:55:328:61 | access to parameter element : A | CollectionFlow.cs:328:44:328:48 | [post] access to parameter array : A[] [element] : A | provenance | |
| CollectionFlow.cs:332:13:332:13 | access to local variable a : A | CollectionFlow.cs:334:23:334:23 | access to local variable a : A | provenance | |
| CollectionFlow.cs:332:17:332:23 | object creation of type A : A | CollectionFlow.cs:332:13:332:13 | access to local variable a : A | provenance | |
Expand All @@ -267,7 +267,7 @@ edges
| CollectionFlow.cs:337:20:337:22 | access to local variable as : A[] [element] : A | CollectionFlow.cs:22:34:22:35 | ts : A[] [element] : A | provenance | |
| CollectionFlow.cs:337:20:337:22 | access to local variable as : A[] [element] : A | CollectionFlow.cs:337:14:337:23 | call to method First<A> | provenance | |
| CollectionFlow.cs:350:34:350:40 | element : A | CollectionFlow.cs:350:55:350:61 | access to parameter element : A | provenance | |
| CollectionFlow.cs:350:46:350:49 | [post] access to parameter list : List<T> [element] : A | CollectionFlow.cs:350:26:350:29 | list [Return] : List<T> [element] : A | provenance | |
| CollectionFlow.cs:350:46:350:49 | [post] access to parameter list : List<T> [element] : A | CollectionFlow.cs:350:26:350:29 | list [Reverse] : List<T> [element] : A | provenance | |
| CollectionFlow.cs:350:55:350:61 | access to parameter element : A | CollectionFlow.cs:350:46:350:49 | [post] access to parameter list : List<T> [element] : A | provenance | MaD:3 |
| CollectionFlow.cs:354:13:354:13 | access to local variable a : A | CollectionFlow.cs:356:23:356:23 | access to local variable a : A | provenance | |
| CollectionFlow.cs:354:17:354:23 | object creation of type A : A | CollectionFlow.cs:354:13:354:13 | access to local variable a : A | provenance | |
Expand Down Expand Up @@ -562,7 +562,7 @@ nodes
| CollectionFlow.cs:309:21:309:23 | kvp : KeyValuePair<A,Int32> [property Key] : A | semmle.label | kvp : KeyValuePair<A,Int32> [property Key] : A |
| CollectionFlow.cs:311:18:311:20 | access to parameter kvp : KeyValuePair<A,Int32> [property Key] : A | semmle.label | access to parameter kvp : KeyValuePair<A,Int32> [property Key] : A |
| CollectionFlow.cs:311:18:311:24 | access to property Key | semmle.label | access to property Key |
| CollectionFlow.cs:328:23:328:27 | array [Return] : A[] [element] : A | semmle.label | array [Return] : A[] [element] : A |
| CollectionFlow.cs:328:23:328:27 | array [Reverse] : A[] [element] : A | semmle.label | array [Reverse] : A[] [element] : A |
| CollectionFlow.cs:328:32:328:38 | element : A | semmle.label | element : A |
| CollectionFlow.cs:328:44:328:48 | [post] access to parameter array : A[] [element] : A | semmle.label | [post] access to parameter array : A[] [element] : A |
| CollectionFlow.cs:328:55:328:61 | access to parameter element : A | semmle.label | access to parameter element : A |
Expand All @@ -575,7 +575,7 @@ nodes
| CollectionFlow.cs:336:18:336:20 | access to local variable as : A[] [element] : A | semmle.label | access to local variable as : A[] [element] : A |
| CollectionFlow.cs:337:14:337:23 | call to method First<A> | semmle.label | call to method First<A> |
| CollectionFlow.cs:337:20:337:22 | access to local variable as : A[] [element] : A | semmle.label | access to local variable as : A[] [element] : A |
| CollectionFlow.cs:350:26:350:29 | list [Return] : List<T> [element] : A | semmle.label | list [Return] : List<T> [element] : A |
| CollectionFlow.cs:350:26:350:29 | list [Reverse] : List<T> [element] : A | semmle.label | list [Reverse] : List<T> [element] : A |
| CollectionFlow.cs:350:34:350:40 | element : A | semmle.label | element : A |
| CollectionFlow.cs:350:46:350:49 | [post] access to parameter list : List<T> [element] : A | semmle.label | [post] access to parameter list : List<T> [element] : A |
| CollectionFlow.cs:350:55:350:61 | access to parameter element : A | semmle.label | access to parameter element : A |
Expand Down Expand Up @@ -684,9 +684,9 @@ subpaths
| CollectionFlow.cs:222:27:222:30 | access to local variable dict : Dictionary<T,T> [element, property Key] : A | CollectionFlow.cs:34:57:34:60 | dict : Dictionary<T,T> [element, property Key] : A | CollectionFlow.cs:34:66:34:81 | access to property Key : A | CollectionFlow.cs:222:14:222:31 | call to method DictFirstKey<A> |
| CollectionFlow.cs:240:28:240:31 | access to local variable dict : Dictionary<T,T> [element, property Key] : A | CollectionFlow.cs:32:58:32:61 | dict : Dictionary<T,T> [element, property Key] : A | CollectionFlow.cs:32:67:32:83 | call to method First<T> : A | CollectionFlow.cs:240:14:240:32 | call to method DictKeysFirst<A> |
| CollectionFlow.cs:241:27:241:30 | access to local variable dict : Dictionary<T,T> [element, property Key] : A | CollectionFlow.cs:34:57:34:60 | dict : Dictionary<T,T> [element, property Key] : A | CollectionFlow.cs:34:66:34:81 | access to property Key : A | CollectionFlow.cs:241:14:241:31 | call to method DictFirstKey<A> |
| CollectionFlow.cs:334:23:334:23 | access to local variable a : A | CollectionFlow.cs:328:32:328:38 | element : A | CollectionFlow.cs:328:23:328:27 | array [Return] : A[] [element] : A | CollectionFlow.cs:334:18:334:20 | [post] access to local variable as : A[] [element] : A |
| CollectionFlow.cs:334:23:334:23 | access to local variable a : A | CollectionFlow.cs:328:32:328:38 | element : A | CollectionFlow.cs:328:23:328:27 | array [Reverse] : A[] [element] : A | CollectionFlow.cs:334:18:334:20 | [post] access to local variable as : A[] [element] : A |
| CollectionFlow.cs:337:20:337:22 | access to local variable as : A[] [element] : A | CollectionFlow.cs:22:34:22:35 | ts : A[] [element] : A | CollectionFlow.cs:22:41:22:45 | access to array element : A | CollectionFlow.cs:337:14:337:23 | call to method First<A> |
| CollectionFlow.cs:356:23:356:23 | access to local variable a : A | CollectionFlow.cs:350:34:350:40 | element : A | CollectionFlow.cs:350:26:350:29 | list [Return] : List<T> [element] : A | CollectionFlow.cs:356:17:356:20 | [post] access to local variable list : List<T> [element] : A |
| CollectionFlow.cs:356:23:356:23 | access to local variable a : A | CollectionFlow.cs:350:34:350:40 | element : A | CollectionFlow.cs:350:26:350:29 | list [Reverse] : List<T> [element] : A | CollectionFlow.cs:356:17:356:20 | [post] access to local variable list : List<T> [element] : A |
| CollectionFlow.cs:359:24:359:27 | access to local variable list : List<T> [element] : A | CollectionFlow.cs:24:43:24:46 | list : List<T> [element] : A | CollectionFlow.cs:24:52:24:58 | access to indexer : A | CollectionFlow.cs:359:14:359:28 | call to method ListFirst<A> |
#select
| CollectionFlow.cs:40:17:40:23 | object creation of type A : A | CollectionFlow.cs:40:17:40:23 | object creation of type A : A | CollectionFlow.cs:14:52:14:56 | access to array element | $@ | CollectionFlow.cs:14:52:14:56 | access to array element | access to array element |
Expand Down
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