Concurrency/async_sequence_existential.swift is failing on main build #80582

Steelskin · 2025-04-07T09:53:52Z

Description

On the main toolchain build, this test has been failing consistently for a few builds: Swift(windows-x86_64) :: Concurrency/async_sequence_existential.swift

First failing build: https://ci-external.swift.org/job/swift-main-windows-toolchain/1216/

Additional information

Full failure log:

# RUN: at line 1
't:\\5\\bin\\swift-frontend.exe' -target x86_64-unknown-windows-msvc  -module-cache-path T:\5\swift-test-results\x86_64-unknown-windows-msvc\clang-module-cache -vfsoverlay T:/5/tools/swift\stdlib\windows-vfs-overlay.yaml -strict-implicit-module-context -Xcc -Xclang -Xcc -fbuiltin-headers-in-system-modules -swift-version 4  -define-availability 'SwiftStdlib 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999' -define-availability 'SwiftStdlib 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2' -define-availability 'SwiftStdlib 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0' -define-availability 'SwiftStdlib 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4' -define-availability 'SwiftStdlib 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0' -define-availability 'SwiftStdlib 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5' -define-availability 'SwiftStdlib 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0' -define-availability 'SwiftStdlib 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4' -define-availability 'SwiftStdlib 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0' -define-availability 'SwiftStdlib 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4' -define-availability 'SwiftStdlib 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0' -define-availability 'SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1' -define-availability 'SwiftStdlib 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0' -define-availability 'SwiftStdlib 6.1:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlib 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -typo-correction-limit 10  -target x86_64-unknown-windows-msvc C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift -emit-sil -o /dev/null -verify
# executed command: 't:\\5\\bin\\swift-frontend.exe' -target x86_64-unknown-windows-msvc -module-cache-path 'T:\5\swift-test-results\x86_64-unknown-windows-msvc\clang-module-cache' -vfsoverlay 'T:/5/tools/swift\stdlib\windows-vfs-overlay.yaml' -strict-implicit-module-context -Xcc -Xclang -Xcc -fbuiltin-headers-in-system-modules -swift-version 4 -define-availability 'SwiftStdlib 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999' -define-availability 'SwiftStdlib 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2' -define-availability 'SwiftStdlib 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0' -define-availability 'SwiftStdlib 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4' -define-availability 'SwiftStdlib 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0' -define-availability 'SwiftStdlib 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5' -define-availability 'SwiftStdlib 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0' -define-availability 'SwiftStdlib 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4' -define-availability 'SwiftStdlib 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0' -define-availability 'SwiftStdlib 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4' -define-availability 'SwiftStdlib 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0' -define-availability 'SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1' -define-availability 'SwiftStdlib 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0' -define-availability 'SwiftStdlib 6.1:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlib 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -typo-correction-limit 10 -target x86_64-unknown-windows-msvc 'C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift' -emit-sil -o /dev/null -verify
# RUN: at line 3
't:\\5\\bin\\swift-frontend.exe' -target x86_64-unknown-windows-msvc  -module-cache-path T:\5\swift-test-results\x86_64-unknown-windows-msvc\clang-module-cache -vfsoverlay T:/5/tools/swift\stdlib\windows-vfs-overlay.yaml -strict-implicit-module-context -Xcc -Xclang -Xcc -fbuiltin-headers-in-system-modules -swift-version 4  -define-availability 'SwiftStdlib 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999' -define-availability 'SwiftStdlib 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2' -define-availability 'SwiftStdlib 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0' -define-availability 'SwiftStdlib 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4' -define-availability 'SwiftStdlib 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0' -define-availability 'SwiftStdlib 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5' -define-availability 'SwiftStdlib 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0' -define-availability 'SwiftStdlib 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4' -define-availability 'SwiftStdlib 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0' -define-availability 'SwiftStdlib 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4' -define-availability 'SwiftStdlib 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0' -define-availability 'SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1' -define-availability 'SwiftStdlib 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0' -define-availability 'SwiftStdlib 6.1:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlib 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -typo-correction-limit 10  -target x86_64-unknown-windows-msvc C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift -dump-ast 2>&1 | T:\PythonAMD64-3.9.10\tools\python.exe C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\utils\PathSanitizingFileCheck --allow-unused-prefixes --sanitize BUILD_DIR=T:/5 --sanitize SOURCE_DIR=C:/Users/swift-ci/jenkins/workspace/swift-main-windows-toolchain/swift --ignore-runtime-warnings --use-filecheck t:\5\bin\filecheck.exe  --enable-windows-compatibility C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift
# executed command: 't:\\5\\bin\\swift-frontend.exe' -target x86_64-unknown-windows-msvc -module-cache-path 'T:\5\swift-test-results\x86_64-unknown-windows-msvc\clang-module-cache' -vfsoverlay 'T:/5/tools/swift\stdlib\windows-vfs-overlay.yaml' -strict-implicit-module-context -Xcc -Xclang -Xcc -fbuiltin-headers-in-system-modules -swift-version 4 -define-availability 'SwiftStdlib 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999' -define-availability 'SwiftStdlib 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2' -define-availability 'SwiftStdlib 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0' -define-availability 'SwiftStdlib 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4' -define-availability 'SwiftStdlib 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0' -define-availability 'SwiftStdlib 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5' -define-availability 'SwiftStdlib 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0' -define-availability 'SwiftStdlib 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4' -define-availability 'SwiftStdlib 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0' -define-availability 'SwiftStdlib 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4' -define-availability 'SwiftStdlib 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0' -define-availability 'SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1' -define-availability 'SwiftStdlib 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0' -define-availability 'SwiftStdlib 6.1:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlib 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -typo-correction-limit 10 -target x86_64-unknown-windows-msvc 'C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift' -dump-ast
# executed command: 'T:\PythonAMD64-3.9.10\tools\python.exe' 'C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\utils\PathSanitizingFileCheck' --allow-unused-prefixes --sanitize BUILD_DIR=T:/5 --sanitize SOURCE_DIR=C:/Users/swift-ci/jenkins/workspace/swift-main-windows-toolchain/swift --ignore-runtime-warnings --use-filecheck 't:\5\bin\filecheck.exe' --enable-windows-compatibility 'C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift'
# .---command stderr------------
# | C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift:12:12: error: CHECK: expected string not found in input
# |  // CHECK: "error" interface_type="any Error"
# |            ^
# | <stdin>:1:1: note: scanning from here
# | (source_file "C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift"
# | ^
# | <stdin>:7:201: note: possible intended match here
# |  (func_decl decl_context=0x212c8ec6320 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:11:1 - line:18:1] "test(seq:)" interface_type="(any AsyncSequence) async -> ()" access=internal result="()" thrown_type="<null>"
# |                                                                                                                                                                                                         ^
# | 
# | Input file: <stdin>
# | Check file: C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1: (source_file "C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift" 
# | check:12'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |             2:  (extension_decl decl_context=0x212c8ec6320 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:7:1 - line:9:1] "Error" 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             3:  (func_decl decl_context=0x212c8ec8358 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:8:3 - line:8:20] "printMe()" interface_type="<Self where Self : Error> (Self) -> () -> ()" access=internal captures=(<generic> type=τ_0_0) 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             4:  (parameter "self" decl_context=0x212c8ecc9c8) result="()" thrown_type="<null>" 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             5:  (parameter_list range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:8:15 - line:8:16]) 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             6:  (brace_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:8:18 - line:8:20]))) 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             7:  (func_decl decl_context=0x212c8ec6320 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:11:1 - line:18:1] "test(seq:)" interface_type="(any AsyncSequence) async -> ()" access=internal result="()" thrown_type="<null>" 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:12'1                                                                                                                                                                                                             ?                                                                                                         possible intended match
# |             8:  (parameter_list range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:11:10 - line:11:33] 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             9:  (parameter "seq" decl_context=0x212c8eccc70 apiName="seq" interface_type="any AsyncSequence")) 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            10:  (brace_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:11:41 - line:18:1] 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            11:  (do_catch_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:13:3 - line:17:3] decl_context=0x212c8eccc70 nothrow 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            12:  (body=brace_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:13:6 - line:15:3] 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

The text was updated successfully, but these errors were encountered:

Steelskin · 2025-04-07T09:57:17Z

I suspect this is a side effect of one of these 2 commits: b97ec5b or 703126a

These rewrite the diagnostic messages. The test expectations probably need to be updated @tshortli

tshortli · 2025-04-07T14:41:23Z

The timing of the test failing does indicate that this is probably fallout from #80560. However, I have no idea what the difference is because the test failure output is pretty useless for debugging this, unfortunately. I ran full tests on this PR, which includes invoking this test on Windows and it passed. I have no idea what would be different about the Windows toolchain build that would make it sensitive to this.

swiftlang#80582

Steelskin · 2025-04-08T09:04:28Z

Here is the output with the recent changes:

# .---command stderr------------
# | C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift:12:12: error: CHECK: expected string not found in input
# |  // CHECK: "error" interface_type="any Error"
# |            ^
# | <stdin>:1:1: note: scanning from here
# | (source_file "C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift"
# | ^
# | <stdin>:7:201: note: possible intended match here
# |  (func_decl decl_context=0x250eb7b1a00 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:11:1 - line:18:1] "test(seq:)" interface_type="(any AsyncSequence) async -> ()" access=internal result="()" thrown_type="<null>"
# |                                                                                                                                                                                                         ^
# | 
# | Input file: <stdin>
# | Check file: C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1: (source_file "C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift" 
# | check:12'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |             2:  (extension_decl decl_context=0x250eb7b1a00 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:7:1 - line:9:1] "Error" 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             3:  (func_decl decl_context=0x250eb7b7e78 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:8:3 - line:8:20] "printMe()" interface_type="<Self where Self : Error> (Self) -> () -> ()" access=internal captures=(<generic> type=τ_0_0) 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             4:  (parameter "self" decl_context=0x250eb7c1a38) result="()" thrown_type="<null>" 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             5:  (parameter_list range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:8:15 - line:8:16]) 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             6:  (brace_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:8:18 - line:8:20]))) 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             7:  (func_decl decl_context=0x250eb7b1a00 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:11:1 - line:18:1] "test(seq:)" interface_type="(any AsyncSequence) async -> ()" access=internal result="()" thrown_type="<null>" 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:12'1                                                                                                                                                                                                             ?                                                                                                         possible intended match
# |             8:  (parameter_list range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:11:10 - line:11:33] 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             9:  (parameter "seq" decl_context=0x250eb7c1ce0 apiName="seq" interface_type="any AsyncSequence")) 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            10:  (brace_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:11:41 - line:18:1] 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            11:  (do_catch_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:13:3 - line:17:3] decl_context=0x250eb7c1ce0 nothrow 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            12:  (body=brace_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:13:6 - line:15:3] 
# | check:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

I think the bug here is that the new output no longer says "error" at any point. Did that get eaten somewhere?

tshortli · 2025-04-08T14:51:04Z

Actually, this is the output after my latest changes designed to aid debugging this failure:

# .---command stderr------------
# | C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift:13:12: error: CHECK: expected string not found in input
# |  // CHECK: (var_decl {{.*}} "error" interface_type="any Error"
# |            ^
# | <stdin>:61:14: note: scanning from here
# |  (catch_stmts=array
# |              ^
# | <stdin>:72:2: note: possible intended match here
# |  (opaque_value_expr implicit type="any Error" location=C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:17:5 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:17:5 - line:17:5] "0x1b6373f8488")
# |  ^
# | 
# | Input file: <stdin>
# | Check file: C:\Users\swift-ci\jenkins\workspace\swift-main-windows-toolchain\swift\test\Concurrency\async_sequence_existential.swift
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |            56:  (argument_list implicit labels="isolation:" 
# |            57:  (argument label="isolation" 
# |            58:  (current_context_isolation_expr implicit type="(any Actor)?" location=C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:15:5 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:15:5 - line:15:5] 
# |            59:  (nil_literal_expr type="(any Actor)?" location=C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:15:5 range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:15:5 - line:15:5] initializer="**NULL**")))))))))))) 
# |            60:  (brace_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:15:28 - line:15:30]))) 
# |            61:  (catch_stmts=array 
# | check:13'0                  X~~~~~~ error: no match found
# |            62:  (case_stmt range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:16:5 - line:18:3] 
# | check:13'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            63:  (case_body_variables=array 
# | check:13'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            64:  (var_decl decl_context=0x1b6372f18a0 implicit range=[C:\\Users\\swift-ci\\jenkins\\workspace\\swift-main-windows-toolchain\\swift\\test\\Concurrency\\async_sequence_existential.swift:16:11 - line:16:11] "error" int 
# | check:13'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            65: erface_type="any Error" let readImpl=stored immutable 
# | check:13'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            66:  (has_storage_attr implicit)))

https://ci-external.swift.org/job/swift-main-windows-toolchain/1222/

The var_decl named error is there, but apparently it now prints with a random line break in the middle, interfering with the CHECK. Adding the source location must have pushed it over whatever character limit there is here. That's why this only fails during the toolchain build and not during PR testing. In the toolchain build the file paths are the right length to cause this behavior.

This AST dump wrapping behavior is really bad.

tshortli · 2025-04-08T15:26:19Z

I suggest we turn this test off in this configuration for now as this behavior is totally bizarre and the new output shows that nothing is actually broken except for how -dump-ast is rendered on this one bot.

tshortli · 2025-04-08T17:00:17Z

@compnerd do you have any insight into why this might be happening or have you seen anything like this before? Could it be something weird about how Windows handles flushing llvm::raw_ostream? To reiterate what we know so far:

ASTDumper just uses llvm::raw_ostream and AFAICT does not attempt to wrap the output itself
This doesn't happen on any of the PR testing bots
This doesn't happen when requesting a Windows toolchain build on a PR
There are longer lines in the output than the one that has the spurious line break

Unblocks the Windows toolchain build, which is experiencing a weird symptom that causes this test to fail only in that context. The failure is tracked by swiftlang#80582.

tshortli · 2025-04-09T01:21:55Z

Disabling the test for Windows here: #80663

The fix in swiftlang#80685 (using `-o` to write the output to a file, instead of relying on stdout/stderr redirection) seems to have addressed this issue on other bots. Resolves swiftlang#80582.

tshortli · 2025-04-15T15:51:07Z

The underlying issue should have been resolved by #80685. I'm now re-enabling the test for Windows using #80825.

Steelskin added bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. triage needed This issue needs more specific labels labels Apr 7, 2025

tshortli added a commit to tshortli/swift that referenced this issue Apr 7, 2025

Tests: Make async_sequence_existential.swift failures easier to debug.

fe54960

swiftlang#80582

tshortli mentioned this issue Apr 7, 2025

Tests: Make async_sequence_existential.swift failures easier to debug #80590

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tshortli mentioned this issue Apr 9, 2025

Tests: Disable async_sequence_existential.swift on Windows #80663

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tshortli linked a pull request Apr 15, 2025 that will close this issue

Tests: Re-enable async_sequence_existential.swift on Windows #80825

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tshortli linked a pull request Apr 15, 2025 that will close this issue

Tests: Use -o instead of stdout redirect in async_sequence_existential.swift #80685

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Concurrency/async_sequence_existential.swift is failing on main build #80582

Concurrency/async_sequence_existential.swift is failing on main build #80582

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Concurrency/async_sequence_existential.swift is failing on main build #80582

Concurrency/async_sequence_existential.swift is failing on main build #80582

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