x/tools/go/loader: TestStdlib failures

[gopherbot]

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestStdlib
--- FAIL: TestStdlib (88.64s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 2119 [running]:
testing.tRunner.func1.2({0xe463080, 0xe62ded0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0xe463080?, 0xe62ded0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc0002294a0, 0xc0360cefc0, {0xc00bec6360, 0x22, 0x22}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2452999121/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc0009ac000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2452999121/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc0075f5500)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2452999121/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc0075f5500, 0xe4a9458)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

2025-03-05 19:59 x_tools-gotip-darwin-amd64-longtest tools@25a90bef go@cad4dca5 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (88.64s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 2119 [running]:
testing.tRunner.func1.2({0xe463080, 0xe62ded0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0xe463080?, 0xe62ded0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc0002294a0, 0xc0360cefc0, {0xc00bec6360, 0x22, 0x22}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2452999121/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc0009ac000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2452999121/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc0075f5500)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2452999121/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc0075f5500, 0xe4a9458)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

2025-03-05 18:38 x_tools-gotip-darwin-amd64-longtest tools@db6008cb go@cad4dca5 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (84.80s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 2147 [running]:
testing.tRunner.func1.2({0x7d60080, 0x7f2aed0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0x7d60080?, 0x7f2aed0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc000642a80, 0xc018f15380, {0xc019c76988, 0x1, 0x1}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo422986406/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc00006a000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo422986406/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc000083180)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo422986406/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc000083180, 0x7da6458)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

2025-03-05 16:17 x_tools-gotip-darwin-amd64-longtest tools@07219402 go@cad4dca5 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (77.80s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 2071 [running]:
testing.tRunner.func1.2({0x10151080, 0x1031bed0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0x10151080?, 0x1031bed0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc0000dad80, 0xc00a8bef00, {0xc049dcad80, 0x5, 0x5}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3828137159/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc000046000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3828137159/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc008442000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3828137159/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc008442000, 0x10197458)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

2025-03-05 20:18 x_tools-gotip-darwin-amd64-longtest tools@6a5b66be go@938b6c15 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (81.00s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 2082 [running]:
testing.tRunner.func1.2({0x7822080, 0x79eced0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0x7822080?, 0x79eced0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc00027e480, 0xc00c824480, {0xc002de4188, 0x1, 0x1}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2631517673/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc00005e000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2631517673/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc00ab04540)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2631517673/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc00ab04540, 0x7868458)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

2025-03-06 18:34 x_tools-gotip-darwin-amd64-longtest tools@b08c7a26 go@1cf6b502 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (84.01s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 2108 [running]:
testing.tRunner.func1.2({0xccdf080, 0xcea9ed0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0xccdf080?, 0xcea9ed0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc0000940c0, 0xc060125200, {0xc01291dd60, 0x2, 0x2}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2037141390/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc001040000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2037141390/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc0072f0380)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2037141390/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc0072f0380, 0xcd25458)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

2025-03-06 18:34 x_tools-gotip-darwin-amd64-longtest tools@b08c7a26 go@24d22352 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (79.50s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 2112 [running]:
testing.tRunner.func1.2({0xd0b9080, 0xd283ed0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0xd0b9080?, 0xd283ed0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc0001d0660, 0xc008865800, {0xc0608deb70, 0x5, 0x5}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2624835738/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc000046000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2624835738/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc0056b4540)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2624835738/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc0056b4540, 0xd0ff458)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

2025-03-06 18:34 x_tools-gotip-darwin-amd64-longtest tools@b08c7a26 go@9bd21607 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (67.99s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 1904 [running]:
testing.tRunner.func1.2({0x6ab6080, 0x6c80ed0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0x6ab6080?, 0x6c80ed0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc0005902a0, 0xc00ae04a80, {0xc00f6b8900, 0x2, 0x2}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2727840031/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc000046000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2727840031/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc0069a8000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo2727840031/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc0069a8000, 0x6afc458)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

2025-03-06 18:34 x_tools-gotip-darwin-amd64-longtest tools@b08c7a26 go@f55bb135 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (106.10s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 2083 [running]:
testing.tRunner.func1.2({0x95ad080, 0x9777ed0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0x95ad080?, 0x9777ed0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc0001dc540, 0xc055e409c0, {0xc05245b9a8, 0x1, 0x1}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3097948436/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc001074000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3097948436/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc0056828c0)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3097948436/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc0056828c0, 0x95f3458)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

2025-03-06 18:34 x_tools-gotip-darwin-amd64-longtest tools@b08c7a26 go@8a7742e7 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (78.03s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 1783 [running]:
testing.tRunner.func1.2({0x9790100, 0x995aed0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0x9790100?, 0x995aed0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc0000955c0, 0xc02c5f5980, {0xc074617d18, 0x1, 0x1}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3282550801/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc000046000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3282550801/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc0072661c0)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3282550801/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc0072661c0, 0x97d6578)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/go/loader" && test == "TestStdlib"

2025-03-06 18:34 x_tools-gotip-darwin-amd64-longtest tools@b08c7a26 go@232dfd22 x/tools/go/loader.TestStdlib (log)

=== RUN   TestStdlib
--- FAIL: TestStdlib (111.12s)
panic: assignment to entry in nil map [recovered, reraised]

goroutine 2133 [running]:
testing.tRunner.func1.2({0xb959100, 0xbb23ed0})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1740 +0x21c
testing.tRunner.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1743 +0x363
panic({0xb959100?, 0xbb23ed0?})
...
golang.org/x/tools/go/loader.(*importer).addFiles(0xc00005cc60, 0xc013a22600, {0xc00ed23cc0, 0x2, 0x2}, 0x0?)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3049520844/go/loader/loader.go:1006 +0xe5
golang.org/x/tools/go/loader.(*Config).Load(0xc003a4c000)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3049520844/go/loader/loader.go:576 +0x806
golang.org/x/tools/go/loader_test.TestStdlib(0xc006ed21c0)
	/Users/swarming/.swarming/w/ir/x/w/targetrepo3049520844/go/loader/stdlib_test.go:53 +0x2f3
testing.tRunner(0xc006ed21c0, 0xb99f578)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1798 +0xea
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1857 +0x413

— watchflakes

[ianlancetaylor]

CC @golang/tools-team

There seem to be consistent failures of x/tools/go/loader TestStdlib on the darwin-amd64-longtest builder.

[ianlancetaylor]

Fails on Linux as well.