Callers and Callees on a .zig file say the language server does not answer them

The in-process ZLS answers no call hierarchy, and no other backend speaks .zig, so the question went nowhere and came back empty, as if nothing called the function. A question no backend answers, or a server that advertises no call or type hierarchy, now answers @none with why, which the core says.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/lsp/lsp_client.zig b/src/lsp/lsp_client.zig
index c3762f08..55df1f91 100644
--- a/src/lsp/lsp_client.zig
+++ b/src/lsp/lsp_client.zig
@@ -408,6 +408,7 @@ pub fn query(gpa: std.mem.Allocator, arena: std.mem.Allocator, req: lsp.Req, out
         tr.note("STOP: no language server spec matches {s}", .{
             if (req.path.len == 0) "a pane with no file" else req.path,
         });
+        if (req.kind != .explain) return lsp.none(out, "no language server for {s}", .{if (req.path.len == 0) "a pane with no file" else std.fs.path.basename(req.path)});
         return traceOut(&tr, req, out, 0, 0);
     };
     tr.note("file {s} -> {s} (languageId {s})", .{ std.fs.path.basename(req.path), specs[si].name, specs[si].lang });
@@ -807,11 +808,11 @@ fn hierarchy(c: *Conn, si: usize, arena: std.mem.Allocator, cx: *Cx, uri: []cons
     const call_side = h == .incoming or h == .outgoing;
     if (call_side and !c.caps.call_hier) {
         tr.note("STOP: {s} does not advertise callHierarchyProvider", .{specs[si].name});
-        return;
+        return lsp.none(cx.out, "{s} does not answer call hierarchy (no callHierarchyProvider)", .{specs[si].name});
     }
     if (!call_side and !c.caps.type_hier) {
         tr.note("STOP: {s} does not advertise typeHierarchyProvider", .{specs[si].name});
-        return;
+        return lsp.none(cx.out, "{s} does not answer type hierarchy (no typeHierarchyProvider)", .{specs[si].name});
     }
     const prepare: []const u8 = if (call_side) "textDocument/prepareCallHierarchy" else "textDocument/prepareTypeHierarchy";
     const follow: []const u8 = switch (h) {