cmd/compile: "bad ptr to array in slice" in SSA slice handling #71252
Description
#!stacks "cmd/compile/internal/ssagen.(*state).slice:+14" Issue created by stacks.
This stack XSjlkw was reported by telemetry:
compile/bugcmd/compile/internal/base.FatalfAt:+3cmd/compile/internal/base.Fatalf:=195cmd/compile/internal/ssagen.(*ssafn).Fatalf:+3cmd/compile/internal/ssagen.(*state).Fatalf:+1cmd/compile/internal/ssagen.(*state).slice:+14cmd/compile/internal/ssagen.(*state).exprCheckPtr:+619cmd/compile/internal/ssagen.(*state).expr:=2776cmd/compile/internal/ssagen.(*state).stmt:+252cmd/compile/internal/ssagen.(*state).stmtList:=1442cmd/compile/internal/ssagen.buildssa:+277cmd/compile/internal/ssagen.Compile:+1cmd/compile/internal/gc.compileFunctions.func5.1:+1cmd/compile/internal/gc.compileFunctions.func2:+1cmd/compile/internal/gc.compileFunctions.func5:+4cmd/compile/internal/gc.compileFunctions.func5.1:+2cmd/compile/internal/gc.compileFunctions.func2:+1
cmd/compile@go1.23.2 go1.23.2 linux/amd64 (8) func (s *state) slice(v, i, j, k *ssa.Value, bounded bool) (p, l, c *ssa.Value) { t := v.Type var ptr, len, cap *ssa.Value switch { ... case t.IsPtr(): if !t.Elem().IsArray() { s.Fatalf("bad ptr to array in slice %v\n", t) } cc @golang/compiler
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