66bdc70bf1
Move examples/*.sx and their expected/ snapshots into per-category subfolders (examples/<category>/...). Folder = leading filename token, with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus runner and LSP sweep now discover each category's expected/ dir, while issues/ stays flat. Example 1058's repo-root-relative companion import is made file-relative. Path strings embedded in 164 snapshots were regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
40 lines
1.4 KiB
Plaintext
40 lines
1.4 KiB
Plaintext
// Variadic heterogeneous type packs — control-flow follow-up to
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// issue-0045 fix (commit 9e78790).
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//
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// issue-0045's fix routes inline-comptime-body `return X;` into a
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// result slot so the caller's basic block isn't terminated
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// mid-flight. But the fix sets `block_terminated = true` after
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// the inline return — which leaks PAST the enclosing `if`'s
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// merge block. When the body shape is
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// if cond { return X; }
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// return Y;
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// only the then-branch's `return X;` runs; `block_terminated`
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// stays true in the merge block, so `lowerBlockValue`'s loop
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// exits before the trailing `return Y;` lowers. The trailing
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// return never stores into the slot — for the false-condition
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// path the load reads uninitialised stack memory.
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//
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// Pack-fn `..$args` is the shortest repro because `args.len`
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// gives a comptime-feeling test for the condition. The bug is
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// actually shape-agnostic — any comptime body with `if cond
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// { return X; }; return Y;` regresses the same way.
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//
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// `maybe()` with zero call-args takes the false branch and
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// should fall through to `return -1;`. Today it loads garbage
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// from the uninitialised slot.
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#import "modules/std.sx";
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maybe :: (..$args) -> i64 {
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if args.len > 0 {
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return 42;
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}
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return -1;
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}
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main :: () -> i32 {
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print("{}\n", maybe()); // expect -1
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print("{}\n", maybe(99)); // expect 42
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return 0;
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}
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