zig

commit f78c56aa7de3f70be1d7c9a54fad4803f10f65af (tree)
parent cd7ea62a050008d3d8995d4da5f1ffa296dfbb06
Author: Alex Rønne Petersen <alex@alexrp.com>
Date:   Tue,  2 Jun 2026 14:39:20 +0200

Sema: make @breakpoint at comptime an error

closes https://github.com/ziglang/zig/issues/18260

Diffstat:
M
src/Sema.zig
 | 
12
+++++++++---
A
test/cases/compile_errors/@breakpoint_comptime_call.zig
 | 
7
+++++++

2 files changed, 16 insertions(+), 3 deletions(-)
diff --git a/src/Sema.zig b/src/Sema.zig
@@ -1443,9 +1443,7 @@ fn analyzeBodyInner(
                         continue;
                     },
                     .breakpoint => {
-                        if (!block.isComptime()) {
-                            _ = try block.addNoOp(.breakpoint);
-                        }
+                        try sema.zirBreakpoint(block, extended);
                         i += 1;
                         continue;
                     },
@@ -5082,6 +5080,14 @@ fn zirTrap(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!void {
     _ = try block.addNoOp(.trap);
 }
 
+fn zirBreakpoint(sema: *Sema, block: *Block, extended: Zir.Inst.Extended.InstData) CompileError!void {
+    const src_node: std.zig.Ast.Node.Offset = @enumFromInt(@as(i32, @bitCast(extended.operand)));
+    const src = block.nodeOffset(src_node);
+    if (block.isComptime())
+        return sema.fail(block, src, "encountered @breakpoint at comptime", .{});
+    _ = try block.addNoOp(.breakpoint);
+}
+
 fn zirLoop(sema: *Sema, parent_block: *Block, inst: Zir.Inst.Index) CompileError!Air.Inst.Ref {
     const pt = sema.pt;
     const zcu = pt.zcu;
diff --git a/test/cases/compile_errors/@breakpoint_comptime_call.zig b/test/cases/compile_errors/@breakpoint_comptime_call.zig
@@ -0,0 +1,7 @@
+export fn entry() void {
+    comptime @breakpoint();
+}
+
+// error
+//
+// :2:14: error: encountered @breakpoint at comptime