x/tools/internal/gcimporter: TestStdlib/gotypesalias=0 failures

[gopherbot]

#!watchflakes
default <- pkg == "golang.org/x/tools/internal/gcimporter" && test == "TestStdlib/gotypesalias=0"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestStdlib/gotypesalias=0
runtime: VirtualAlloc of 24576 bytes failed with errno=1455
fatal error: out of memory

runtime stack:
runtime.throw({0x7ff79238f64c?, 0x4041911000?})
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:1094 +0x34 fp=0x6b2cdffaa0 sp=0x6b2cdffa70 pc=0x7ff7920c3c74
runtime.sysUsedOS(0x4041910000, 0x6000)
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mem_windows.go:83 +0x168 fp=0x6b2cdffb00 sp=0x6b2cdffaa0 pc=0x7ff79206a1f8
runtime.sysUsed(...)
...
runtime.goparkunlock(...)
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/proc.go:466
runtime.(*cleanupQueue).dequeue(0x7ff792605560)
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mcleanup.go:439 +0x110 fp=0x4000041f80 sp=0x4000041f40 pc=0x7ff792069440
runtime.runCleanups()
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mcleanup.go:635 +0x40 fp=0x4000041fd0 sp=0x4000041f80 pc=0x7ff792069bf0
runtime.goexit({})
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_arm64.s:1268 +0x4 fp=0x4000041fd0 sp=0x4000041fd0 pc=0x7ff7920cb6b4
created by runtime.(*cleanupQueue).createGs in goroutine 11
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mcleanup.go:589 +0x108

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/tools/internal/gcimporter" && test == "TestStdlib/gotypesalias=0"

2025-09-11 11:20 x_tools-go1.25-windows-arm64 tools@63d97811 release-branch.go1.25@56ebf80e x/tools/internal/gcimporter.TestStdlib/gotypesalias=0 [SKIP] (log)

=== RUN   TestStdlib/gotypesalias=0
runtime: VirtualAlloc of 24576 bytes failed with errno=1455
fatal error: out of memory

runtime stack:
runtime.throw({0x7ff79238f64c?, 0x4041911000?})
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:1094 +0x34 fp=0x6b2cdffaa0 sp=0x6b2cdffa70 pc=0x7ff7920c3c74
runtime.sysUsedOS(0x4041910000, 0x6000)
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mem_windows.go:83 +0x168 fp=0x6b2cdffb00 sp=0x6b2cdffaa0 pc=0x7ff79206a1f8
runtime.sysUsed(...)
...
runtime.goparkunlock(...)
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/proc.go:466
runtime.(*cleanupQueue).dequeue(0x7ff792605560)
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mcleanup.go:439 +0x110 fp=0x4000041f80 sp=0x4000041f40 pc=0x7ff792069440
runtime.runCleanups()
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mcleanup.go:635 +0x40 fp=0x4000041fd0 sp=0x4000041f80 pc=0x7ff792069bf0
runtime.goexit({})
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_arm64.s:1268 +0x4 fp=0x4000041fd0 sp=0x4000041fd0 pc=0x7ff7920cb6b4
created by runtime.(*cleanupQueue).createGs in goroutine 11
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mcleanup.go:589 +0x108

2025-09-11 11:22 x_tools-gotip-windows-arm64 tools@16ca2f0b go@253dd08f x/tools/internal/gcimporter.TestStdlib/gotypesalias=0 [SKIP] (log)

=== RUN   TestStdlib/gotypesalias=0
runtime: VirtualAlloc of 8192 bytes failed with errno=1455
fatal error: out of memory

runtime stack:
runtime.throw({0x7ff6c4490191?, 0xdd899ff770?})
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:1227 +0x34 fp=0xdd899ff730 sp=0xdd899ff700 pc=0x7ff6c41c3eb4
runtime.sysUsedOS(0x4039976000, 0x2000)
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mem_windows.go:83 +0x194 fp=0xdd899ff7b0 sp=0xdd899ff730 pc=0x7ff6c416a344
runtime.sysUsed(...)
...
runtime.goparkunlock(...)
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/proc.go:470
runtime.(*cleanupQueue).dequeue(0x7ff6c4712480)
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mcleanup.go:439 +0x15c fp=0x400009ff80 sp=0x400009ff40 pc=0x7ff6c416958c
runtime.runCleanups()
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mcleanup.go:635 +0x40 fp=0x400009ffd0 sp=0x400009ff80 pc=0x7ff6c4169cd0
runtime.goexit({})
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_arm64.s:1268 +0x4 fp=0x400009ffd0 sp=0x400009ffd0 pc=0x7ff6c41cb0c4
created by runtime.(*cleanupQueue).createGs in goroutine 11
	C:/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mcleanup.go:589 +0x108

— watchflakes

[adonovan]

Dup of #75417.