497d450ba7
`lowerDerefExpr` left the deref's result type `.unresolved` when the
operand wasn't a pointer (e.g. a stale `value.*` after a parameter
changed from `*T` to `T`), and emitted the `.deref` anyway. That
unresolved type slipped through to emit_llvm's "unresolved type reached
LLVM emission" panic with no source location.
Now it emits a clean diagnostic at the deref site
("cannot dereference with `.*`: 'T' is not a pointer") and recovers.
Regression: examples/254-deref-non-pointer-reject.sx.
15 lines
624 B
Plaintext
15 lines
624 B
Plaintext
// `.*` on a non-pointer must be a clean compile diagnostic, NOT a codegen
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// panic. Regression: a stale `value.*` (e.g. after a parameter changed from
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// `*T` to `T` by value) used to lower a `.deref` with an `.unresolved` result
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// type, which slipped through to emit_llvm's "unresolved type reached LLVM
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// emission" panic with no source location. `lowerDerefExpr` now diagnoses it.
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// Expected: a clean error pointing at the deref; exit 1.
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Point :: struct { x: s32; y: s32; }
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main :: () -> s32 {
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p : Point = .{ x = 3, y = 4 };
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q := p.*; // ERROR: `p` is a Point value, not a pointer
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return q.x;
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}
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