Golang cmd/internal/testdir:8_10: Test/maplinear.go failures

#!watchflakes
default <- pkg == "cmd/internal/testdir:8_10" && test == "Test/maplinear.go"

Issue created automatically to collect these failures.

Example (log):

=== RUN   Test/maplinear.go
=== PAUSE Test/maplinear.go
=== CONT  Test/maplinear.go
    testdir_test.go:147: exit status 2
        panic: iterdelete: too slow: 640000 inserts: 2.901882075s; 1280000 inserts: 9.066465617s


        goroutine 1 gp=0xc0000061c0 m=4 mp=0xc000080008 [running]:
        panic({0x10af840?, 0xc000014040?})
            /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:877 +0x16f fp=0xc00009ae50 sp=0xc00009ada0 pc=0x106a2ef
...
        runtime.gcBgMarkWorker(0xc00007e000)
            /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mgc.go:1463 +0xeb fp=0xc00009bfc8 sp=0xc00009bf38 pc=0x101dd4b
        runtime.gcBgMarkStartWorkers.gowrap1()
            /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mgc.go:1373 +0x17 fp=0xc00009bfe0 sp=0xc00009bfc8 pc=0x101dc37
        runtime.goexit({})
            /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:1693 +0x1 fp=0xc00009bfe8 sp=0xc00009bfe0 pc=0x1070a01
        created by runtime.gcBgMarkStartWorkers in goroutine 1
            /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mgc.go:1373 +0x105

--- FAIL: Test/maplinear.go (70.71s)

— watchflakes

Comment From: gopherbot

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/internal/testdir:8_10" && test == "Test/maplinear.go"

2025-08-18 19:15 gotip-darwin-amd64-longtest go@5a56d884 cmd/internal/testdir:8_10.Test/maplinear.go (log)

=== RUN Test/maplinear.go === PAUSE Test/maplinear.go === CONT Test/maplinear.go testdir_test.go:147: exit status 2 panic: iterdelete: too slow: 640000 inserts: 2.901882075s; 1280000 inserts: 9.066465617s goroutine 1 gp=0xc0000061c0 m=4 mp=0xc000080008 [running]: panic({0x10af840?, 0xc000014040?}) /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:877 +0x16f fp=0xc00009ae50 sp=0xc00009ada0 pc=0x106a2ef ... runtime.gcBgMarkWorker(0xc00007e000) /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mgc.go:1463 +0xeb fp=0xc00009bfc8 sp=0xc00009bf38 pc=0x101dd4b runtime.gcBgMarkStartWorkers.gowrap1() /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mgc.go:1373 +0x17 fp=0xc00009bfe0 sp=0xc00009bfc8 pc=0x101dc37 runtime.goexit({}) /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:1693 +0x1 fp=0xc00009bfe8 sp=0xc00009bfe0 pc=0x1070a01 created by runtime.gcBgMarkStartWorkers in goroutine 1 /Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mgc.go:1373 +0x105 --- FAIL: Test/maplinear.go (70.71s)

— watchflakes