stage2: Sema leaks its perm arena

[kubkon]

Zig Version

0.11.0-dev.1426+d39512755

Steps to Reproduce and Observed Behavior

$ ./stage3/bin/zig build test-cases -Denable-macos-sdk -Denable-llvm -Dforce-gpa

[gpa] (err): memory address 0xcb19ee800 leaked:                                                                                                                           
/Users/kubkon/dev/zig/build/stage3/lib/zig/std/heap/arena_allocator.zig:187:35: 0x1041356b3 in alloc (test)                                                               
            (self.createNode(0, n + ptr_align) orelse return null);                                                                                                       
                                  ^                                                                                                                                       
/Users/kubkon/dev/zig/build/stage3/lib/zig/std/mem/Allocator.zig:86:34: 0x104581d07 in allocAdvancedWithRetAddr__anon_94350 (test)                                        
    return self.vtable.alloc(self.ptr, len, ptr_align, ret_addr);                                                                                                         
                                 ^                                                                                                                                        
/Users/kubkon/dev/zig/build/stage3/lib/zig/std/mem/Allocator.zig:105:52: 0x10438d06f in create__anon_81044 (test)                                                         
    const slice = try self.allocAdvancedWithRetAddr(T, null, 1, @returnAddress());                                                                                        
                                                   ^                                                                                                                      
/Users/kubkon/dev/zig/src/Module.zig:4327:59: 0x10419a2af in semaFile (test)                                                                                              
    const struct_obj = try new_decl_arena_allocator.create(Module.Struct);
                                                          ^
/Users/kubkon/dev/zig/src/Sema.zig:11675:28: 0x1045b79fb in zirImport (test)
    try mod.semaFile(result.file);
                           ^
/Users/kubkon/dev/zig/src/Sema.zig:947:64: 0x1043a3ae7 in analyzeBodyInner (test)
            .import                       => try sema.zirImport(block, inst),
                                                               ^
/Users/kubkon/dev/zig/src/Sema.zig:810:45: 0x1041eb143 in analyzeBodyBreak (test)
    const break_inst = sema.analyzeBodyInner(block, body) catch |err| switch (err) {
                                            ^
/Users/kubkon/dev/zig/src/Module.zig:4519:50: 0x1041e79bb in semaDecl (test)
    const result_ref = (try sema.analyzeBodyBreak(&block_scope, body)).?.operand;

Expected Behavior

No memory leaks are reported.

[alichraghi]

i just ran zig build test-cases -Denable-llvm -Dforce-gpa. there's no leak in master

[andrewrk]

Yes this was fixed with the merge of #15569. Thanks @alichraghi