Sema: fix empty slice pointer value

We just checked that inst_child_ty was effectively a zero-bit type, so
it is certainly not the non-zero alignment we are looking for.

Closes #15085

1 files changed, 6 insertions, 1 deletions

diff --git a/src/Sema.zig b/src/Sema.zig
index 13327657a8..1f375853cb 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -25152,7 +25152,7 @@ fn coerceExtra(
                             .ptr = if (dest_info.@"align" != 0)
                                 try Value.Tag.int_u64.create(sema.arena, dest_info.@"align")
                             else
-                                try inst_child_ty.lazyAbiAlignment(target, sema.arena),
+                                try dest_info.pointee_type.lazyAbiAlignment(target, sema.arena),
                             .len = Value.zero,
                         });
                         return sema.addConstant(dest_ty, slice_val);
@@ -30213,6 +30213,11 @@ fn resolveLazyValue(sema: *Sema, val: Value) CompileError!void {
                 try sema.resolveLazyValue(elem_val);
             }
         },
+        .slice => {
+            const slice = val.castTag(.slice).?.data;
+            try sema.resolveLazyValue(slice.ptr);
+            return sema.resolveLazyValue(slice.len);
+        },
         else => return,
     }
 }