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stage2: Resolve union layout before getting tag type in zirTagname

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This bug only causes a failure on my machine when running
test/behavior/eval.zig directly. If running the full behavior test
suite, std.builtin.TypeInfo will have already resolved its layout,
causing the test to pass.

I'd love to add a test that can reliably reproduce this problem,
but I'm afraid I'm not sure how to reliably create a union with
un-resolved layout.
This commit is contained in:
Cody Tapscott 2022-02-27 01:53:56 -07:00
parent 4d658f83ed
commit b52948444f
1 changed files with 1 additions and 0 deletions
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src/Sema.zig
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@ -11837,6 +11837,7 @@ fn zirTagName(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Air
const operand = sema.resolveInst(inst_data.operand);
const operand_ty = sema.typeOf(operand);
try sema.resolveTypeLayout(block, operand_src, operand_ty);
const enum_ty = switch (operand_ty.zigTypeTag()) {
.EnumLiteral => {
const val = try sema.resolveConstValue(block, operand_src, operand);