cmd/compile: bug in cmd/compile/internal/staticdata.WriteEmbed

[prattmic]

Issue created by stacks.

This stack FKZ6Cg was reported by telemetry:

• compile/bug
• cmd/compile/internal/base.FatalfAt:+3
• cmd/compile/internal/base.Fatalf:=195
• cmd/compile/internal/gc.handlePanic:+7
• runtime.gopanic:+50
• runtime.goPanicIndex:+2
• cmd/compile/internal/staticdata.WriteEmbed:+17
• cmd/compile/internal/gc.dumpembeds:=288
• cmd/compile/internal/gc.dumpdata:+3
• cmd/compile/internal/gc.Main:+282
• main.main:+12
• runtime.main:+125
• runtime.goexit:+0

cmd/compile@go1.23.0 go1.23.0 darwin/arm64  (1)
cmd/compile@go1.23.3 go1.23.3 darwin/arm64  (5)
cmd/compile@go1.23.3 go1.23.3 windows/amd64  (1)
cmd/compile@go1.23.4 go1.23.4 darwin/arm64  (1)
cmd/compile@go1.23.4 go1.23.4 windows/amd64  (1)
cmd/compile@go1.23.1 go1.23.1 darwin/arm64  (14)

[gabyhelp]

Related Issues

• cmd/compile: panic with unreachable recover() #48459 (closed)
• cmd/compile: panic during early copyelim crash #35658 (closed)
• cmd/compile: internal compiler error: panic: builtins.go: assertion failed #61486 (closed)
• cmd/compile: internal compiler error: 'init': Value live at entry #56778 (closed)
• cmd/compile: intermittently crash:unexpected fault address 0xc000c060a0 #32729 (closed)
• cmd/compile: compiler error: Dictionary should have already been generated #50561 (closed)
• cmd/compile: when cmd/compile is compiled with `-gcflags = "all=-N -l"`, the output binary panic on start #54412 (closed)
• cmd/compile: internal compiler error: InitTodoFunc still has declarations (with -G=3) #45722 (closed)
• cmd/compile: provide error message for giant strings instead of crashing #16394 (closed)
• cmd/go: 1.15.5 crashes on compiling workspace on darwin/amd64 with goroutine stack exceeds 1000000000-byte limit #43279 (closed)

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[prattmic]

Fixed by https://go.dev/cl/623535.