crypto/ecdsa: TestECDH failures

[gopherbot]

#!watchflakes
default <- pkg == "crypto/ecdsa" && test == "TestECDH"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestECDH (0.00s)
    --- FAIL: TestECDH/P256 (0.00s)
        ecdh_test.go:51: P256 point not on curve
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x15726c]

goroutine 7 gp=0xc0000036c0 m=0 mp=0x2ee960 [running]:
panic({0x179140?, 0x2e3c10?})
	/workdir/go/src/runtime/panic.go:778 +0x188 fp=0xc0000ad868 sp=0xc0000ad7a8 pc=0x4d428
...
crypto/ecdh_test.TestECDH(0xc00008c680?)
	/workdir/go/src/crypto/ecdh/ecdh_test.go:39 +0x34 fp=0xc00006bf30 sp=0xc00006bf00 pc=0x154214
testing.tRunner(0xc00008c680, 0x1c3d80)
	/workdir/go/src/testing/testing.go:1689 +0x118 fp=0xc00006bf90 sp=0xc00006bf30 pc=0xf9ee8
testing.(*T).Run.gowrap1()
	/workdir/go/src/testing/testing.go:1742 +0x50 fp=0xc00006bfc0 sp=0xc00006bf90 pc=0xfae30
runtime.goexit({})
	/workdir/go/src/runtime/asm_ppc64x.s:1018 +0x4 fp=0xc00006bfc0 sp=0xc00006bfc0 pc=0x8c5e4
created by testing.(*T).Run in goroutine 1
	/workdir/go/src/testing/testing.go:1742 +0x398

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "crypto/ecdsa" && test == "TestECDH"

2024-03-29 23:09 linux-ppc64le-power10osu go@89f7805c crypto/ecdsa.TestECDH (log)

--- FAIL: TestECDH (0.00s)
    --- FAIL: TestECDH/P256 (0.00s)
        ecdh_test.go:51: P256 point not on curve
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x15726c]

goroutine 7 gp=0xc0000036c0 m=0 mp=0x2ee960 [running]:
panic({0x179140?, 0x2e3c10?})
	/workdir/go/src/runtime/panic.go:778 +0x188 fp=0xc0000ad868 sp=0xc0000ad7a8 pc=0x4d428
...
crypto/ecdh_test.TestECDH(0xc00008c680?)
	/workdir/go/src/crypto/ecdh/ecdh_test.go:39 +0x34 fp=0xc00006bf30 sp=0xc00006bf00 pc=0x154214
testing.tRunner(0xc00008c680, 0x1c3d80)
	/workdir/go/src/testing/testing.go:1689 +0x118 fp=0xc00006bf90 sp=0xc00006bf30 pc=0xf9ee8
testing.(*T).Run.gowrap1()
	/workdir/go/src/testing/testing.go:1742 +0x50 fp=0xc00006bfc0 sp=0xc00006bf90 pc=0xfae30
runtime.goexit({})
	/workdir/go/src/runtime/asm_ppc64x.s:1018 +0x4 fp=0xc00006bfc0 sp=0xc00006bfc0 pc=0x8c5e4
created by testing.(*T).Run in goroutine 1
	/workdir/go/src/testing/testing.go:1742 +0x398

2024-03-29 23:09 linux-ppc64le-power9osu go@89f7805c crypto/ecdsa.TestECDH (log)

--- FAIL: TestECDH (0.00s)
    --- FAIL: TestECDH/P256 (0.00s)
        ecdh_test.go:51: P256 point not on curve
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x154dcc]

goroutine 7 gp=0xc0000036c0 m=0 mp=0x2ee960 [running]:
panic({0x179140?, 0x2e3c10?})
	/workdir/go/src/runtime/panic.go:778 +0x18c fp=0xc00012d868 sp=0xc00012d7a8 pc=0x4cbac
...
crypto/ecdh_test.TestECDH(0xc00010c680?)
	/workdir/go/src/crypto/ecdh/ecdh_test.go:39 +0x34 fp=0xc00006bf30 sp=0xc00006bf00 pc=0x151e04
testing.tRunner(0xc00010c680, 0x1c3d80)
	/workdir/go/src/testing/testing.go:1689 +0x120 fp=0xc00006bf90 sp=0xc00006bf30 pc=0xf7ac0
testing.(*T).Run.gowrap1()
	/workdir/go/src/testing/testing.go:1742 +0x50 fp=0xc00006bfc0 sp=0xc00006bf90 pc=0xf89e0
runtime.goexit({})
	/workdir/go/src/runtime/asm_ppc64x.s:1018 +0x4 fp=0xc00006bfc0 sp=0xc00006bfc0 pc=0x8b1b4
created by testing.(*T).Run in goroutine 1
	/workdir/go/src/testing/testing.go:1742 +0x390

— watchflakes