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cmd/compile: SEGV compiling crypto/internal/fips140/nistec test #77168

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@gopherbot
#!watchflakes
default <- builder == "gotip-darwin-amd64_14" && repo == "go" && mode == "build"

Issue created automatically to collect these failures.

Example (log):

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[I2026-01-13T08:48:49.463259-08:00 10226 0 sink.go:354] SinkServer: warm-up started
[I2026-01-13T08:48:49.463620-08:00 10226 0 sink.go:427] SinkServer: starting HTTP server...
[I2026-01-13T08:48:49.467539-08:00 10226 0 sink.go:359] SinkServer: warm-up ended
[I2026-01-13T08:48:49.467924-08:00 10226 0 cmd_stream.go:577] rdb-stream: starting the test command - ["/Users/swarming/.swarming/w/ir/cache/tools/bin/result_adapter" "go" "-v=false" "-dump-json" "/Users/swarming/.swarming/w/ir/x/w/dist.testjson" "--" "/Users/swarming/.swarming/w/ir/x/w/goroot/bin/go" "tool" "dist" "test" "-json"]
2026/01/13 09:13:00 Failed: exit status 1
go tool dist: FAILED
ok  	archive/tar	0.284s
ok  	archive/zip	0.463s
...
cannot parse row "crypto/internal/fips140/nistec/p256_table_test.go:30:6: internal compiler error: panic: runtime error: invalid memory address or nil pointer dereference", invalid character 'c' looking for beginning of value
cannot parse row "goroutine 1 [running]:", invalid character 'g' looking for beginning of value
cannot parse row "runtime/debug.Stack()", invalid character 'r' looking for beginning of value
cannot parse row "\truntime/debug/stack.go:26 +0x5e", invalid character 'r' looking for beginning of value
cannot parse row "cmd/compile/internal/base.FatalfAt({0xab125108?, 0x26d?}, {0x87429c5, 0x9}, {0x26dab125138, 0x1, 0x1})", invalid character 'c' looking for beginning of value
cannot parse row "\tcmd/compile/internal/base/print.go:230 +0x18c", invalid character 'c' looking for beginning of value
cannot parse row "cmd/compile/internal/base.Fatalf(...)", invalid character 'c' looking for beginning of value
cannot parse row "\tcmd/compile/internal/base/print.go:195", invalid character 'c' looking for beginning of value
cannot parse row "cmd/compile/internal/gc.handlePanic()", invalid character 'c' looking for beginning of value
cannot parse row "\tcmd/compile/internal/gc/main.go:56 +0x88", invalid character 'c' looking for beginning of value
...
[W2026-01-13T09:13:30.074842-08:00 10226 0 cmd_stream.go:589] rdb-stream: test process exited with error: exit status 2
[I2026-01-13T09:13:30.074902-08:00 10226 0 cmd_stream.go:573] rdb-stream: the test process terminated
[I2026-01-13T09:13:30.075137-08:00 10226 0 sink.go:452] SinkServer: shutdown started
[I2026-01-13T09:13:30.075224-08:00 10226 0 sink.go:430] SinkServer: HTTP server stopped with "http: Server closed"
[I2026-01-13T09:13:30.075242-08:00 10226 0 sink_server.go:96] SinkServer: draining TestResult channel started
[I2026-01-13T09:13:30.964738-08:00 10226 0 sink_server.go:98] SinkServer: draining TestResult channel ended
[I2026-01-13T09:13:30.964792-08:00 10226 0 sink_server.go:100] SinkServer: draining Artifact channel started
[I2026-01-13T09:13:31.084367-08:00 10226 0 sink_server.go:102] SinkServer: draining Artifact channel ended
[I2026-01-13T09:13:31.084420-08:00 10226 0 sink.go:455] SinkServer: shutdown completed successfully
[I2026-01-13T09:13:31.084446-08:00 10226 0 cmd_stream.go:498] rdb-stream: exiting with 2

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