8367ad18b1
library/modules/std/sched.sx: a generic Fiber + Scheduler over the proven naked swap_context on guarded mmap stacks -- init/spawn/yield_now/suspend_self/wake/run (B1.5a), then Task($R) + go/wait/cancel, a truly-suspending nullary-thunk async layer (B1.4a). go(work) runs a thunk as a real fiber; wait() parks the caller until it completes. Self-contained in sched.sx (io.sx importing it would duplicate the _fib_tramp global asm). Hardened per adversarial review: wake guarded on .suspended (FIFO corruption), suspend_self/yield_now guard a null current, loud mmap/mprotect/OOM/deadlock bails, cancel skips not-yet-run work. Closure-env + heap-Task leaks documented (bounded, default-GPA-invisible). Examples: 1811 (round-robin), 1812 (suspend/wake + spurious-wake guard), 1813 (async interleave + await-suspend + cancel). Also files issue 0155 (scalar-pointer index panics codegen -- non-blocking, found in review).
19 lines
937 B
Plaintext
19 lines
937 B
Plaintext
// issue 0155 — indexing a pointer-to-scalar (`pc[0]` where `pc: *i64`) panics
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// the compiler at LLVM emission instead of either lowering `pc[i]` like C
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// (`*(pc + i)`) or emitting a clean diagnostic that `*T` is not indexable.
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//
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// Observed: `thread … panic: unresolved type reached LLVM emission`
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// at src/backend/llvm/types.zig:196 (the `.unresolved` arm of
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// toLLVMTypeInfo), reached via emitIndexGet
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// (src/backend/llvm/ops.zig ~1988) → the index expression's element
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// type resolves to `.unresolved` and is never diagnosed.
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// Expected: either a working scalar-pointer index (`pc[0]` == `pc.*`) or a
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// proper "cannot index a *T; use a slice / deref with .*" diagnostic.
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// A `.unresolved` reaching LLVM is always a compiler bug.
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#import "modules/std.sx";
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main :: () -> i64 {
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x : i64 = 5;
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pc : *i64 = @x;
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return pc[0]; // panics the compiler
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}
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