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reflect:mayMoreStackMove: TestChanOfGC failures #75742

@gopherbot

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@gopherbot
#!watchflakes
default <- pkg == "reflect:mayMoreStackMove" && test == "TestChanOfGC"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestChanOfGC
panic: deadlock in TestChanOfGC

goroutine 270 gp=0x35e013708c40 m=4 mp=0x35e013680008 [running]:
panic({0x55e36c0?, 0x565d710?})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:877 +0x18f fp=0x35e013702f70 sp=0x35e013702ec0 pc=0x532346f
reflect_test.TestChanOfGC.func1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/reflect/all_test.go:6206 +0x89 fp=0x35e013702fe0 sp=0x35e013702f70 pc=0x54e3949
runtime.goexit({})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:1709 +0x1 fp=0x35e013702fe8 sp=0x35e013702fe0 pc=0x532c061
...
reflect_test.TestChanOfGC(0x35e0136f0540)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/reflect/all_test.go:6239 +0x494 fp=0x35e01360df70 sp=0x35e01360dde0 pc=0x54e36f4
testing.tRunner(0x35e0136f0540, 0x565ad18)
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1936 +0xea fp=0x35e01360dfc0 sp=0x35e01360df70 pc=0x53dd46a
testing.(*T).Run.gowrap1()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1999 +0x1b fp=0x35e01360dfe0 sp=0x35e01360dfc0 pc=0x53de59b
runtime.goexit({})
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:1709 +0x1 fp=0x35e01360dfe8 sp=0x35e01360dfe0 pc=0x532c061
created by testing.(*T).Run in goroutine 1
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1999 +0x465

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NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.compiler/runtimeIssues related to the Go compiler and/or runtime.

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