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https://ci.chromium.org/ui/inv/build-8725798219051312433/test-results?sortby=&groupby= shows a mysterious failure with this stack: === RUN BenchmarkAll BenchmarkAll panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x7c497f] goroutine 20 gp=0xc000004000 m=7 mp=0xc000182808 [running]: panic({0x81c5e0?, 0xabc6b0?}) /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:806 +0x168 fp=0xc00c7ffce0 sp=0xc00c7ffc30 pc=0x4ad4c8 runtime.panicmem(...) /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:262 runtime.sigpanic() /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/signal_unix.go:925 +0x359 fp=0xc00c7ffd40 sp=0xc00c7ffce0 pc=0x4af6d9 cmd/api.(*Walker).export(0xc000034100, 0x0) /home/swarming/.swarming/w/ir/x/w/goroot/src/cmd/api/main_test.go:193 +0x3f fp=0xc00c7ffe08 sp=0xc00c7ffd40 pc=0x7c497f cmd/api.BenchmarkAll(0xc000214288) /home/swarming/.swarming/w/ir/x/w/goroot/src/cmd/api/api_test.go:205 +0x207 fp=0xc00c7ffeb0 sp=0xc00c7ffe08 pc=0x7c1c07 testing.(*B).runN(0xc000214288, 0x1) /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:202 +0x291 fp=0xc00c7fff78 sp=0xc00c7ffeb0 pc=0x57e611 testing.(*B).run1.func1() /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:224 +0x7c fp=0xc00c7fffe0 sp=0xc00c7fff78 pc=0x57f11c runtime.goexit({}) /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc00c7fffe8 sp=0xc00c7fffe0 pc=0x4b4a61 created by testing.(*B).run1 in goroutine 1 /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:217 +0x173 So import_ must have returned an error, making pkg nil. Show that error. Also do the same at the other calls to import_. Change-Id: Ie782571c4bda3334a86b303f61969cf1cc7d3c32 Reviewed-on: https://go-review.googlesource.com/c/go/+/642438 Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>