chore(3p/immer): Remove vendored copy of immer r/2029

We ended up dropping the use of this library again.

Change-Id: I2c44cd22a6128d23f87a582402bf5fb84991d608
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2292
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>

1 files changed, 0 insertions, 188 deletions

diff --git a/third_party/immer/test/flex_vector/fuzzed-2.cpp b/third_party/immer/test/flex_vector/fuzzed-2.cpp
deleted file mode 100644
index ba17c1a620ec..000000000000
--- a/third_party/immer/test/flex_vector/fuzzed-2.cpp
+++ /dev/null
@@ -1,188 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "extra/fuzzer/fuzzer_input.hpp"
-#include <array>
-#include <catch.hpp>
-#include <immer/flex_vector.hpp>
-#include <iostream>
-
-#define IMMER_FUZZED_TRACE_ENABLE 0
-
-#if IMMER_FUZZED_TRACE_ENABLE
-#define IMMER_FUZZED_TRACE(...) std::cout << __VA_ARGS__ << std::endl;
-#else
-#define IMMER_FUZZED_TRACE(...)
-#endif
-
-namespace {
-
-template <std::size_t VarCount = 2, unsigned Bits = 2>
-int run_input(const std::uint8_t* data, std::size_t size)
-{
-    using vector_t =
-        immer::flex_vector<int, immer::default_memory_policy, Bits, Bits>;
-    using size_t = std::uint8_t;
-
-    auto vars = std::array<vector_t, VarCount>{};
-
-#if IMMER_FUZZED_TRACE_ENABLE
-    std::cout << "/// new test run" << std::endl;
-    for (auto i = 0u; i < VarCount; ++i)
-        std::cout << "auto var" << i << " = vector_t{};" << std::endl;
-#endif
-
-    auto is_valid_var   = [&](auto idx) { return idx >= 0 && idx < VarCount; };
-    auto is_valid_index = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
-    };
-    auto is_valid_size = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
-    };
-    auto can_concat = [](auto&& v1, auto&& v2) {
-        using size_type = decltype(v1.size());
-        return v2.size() < (std::numeric_limits<size_type>::max() - v1.size());
-    };
-    auto can_insert = [](auto&& v1) {
-        using size_type = decltype(v1.size());
-        return v1.size() < std::numeric_limits<size_type>::max();
-    };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_push_back,
-            op_update,
-            op_take,
-            op_drop,
-            op_concat,
-            op_push_back_move,
-            op_update_move,
-            op_take_move,
-            op_drop_move,
-        };
-        auto src = read<std::uint8_t>(in, is_valid_var);
-        auto dst = read<std::uint8_t>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_push_back:
-            if (can_insert(vars[src])) {
-                IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src
-                                         << ".push_back(42);");
-                vars[dst] = vars[src].push_back(42);
-            }
-            break;
-        case op_update: {
-            auto idx = read<size_t>(in, is_valid_index(vars[src]));
-            IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src << ".update("
-                                     << +idx
-                                     << ", [] (auto x) { return x + 1; });");
-            vars[dst] = vars[src].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take: {
-            auto idx = read<size_t>(in, is_valid_size(vars[src]));
-            IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src << ".take("
-                                     << +idx << ");");
-            vars[dst] = vars[src].take(idx);
-            break;
-        }
-        case op_drop: {
-            auto idx = read<size_t>(in, is_valid_size(vars[src]));
-            IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src << ".take("
-                                     << +idx << ");");
-            vars[dst] = vars[src].drop(idx);
-            break;
-        }
-        case op_concat: {
-            auto src2 = read<std::uint8_t>(in, is_valid_var);
-            if (can_concat(vars[src], vars[src2])) {
-                IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src << " + var"
-                                         << +src2 << ";");
-                vars[dst] = vars[src] + vars[src2];
-            }
-            break;
-        }
-        case op_push_back_move: {
-            if (can_insert(vars[src])) {
-                IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
-                                         << ").push_back(21);");
-                vars[dst] = std::move(vars[src]).push_back(21);
-            }
-            break;
-        }
-        case op_update_move: {
-            auto idx = read<size_t>(in, is_valid_index(vars[src]));
-            IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
-                                     << ").update(" << +idx
-                                     << ", [] (auto x) { return x + 1; });");
-            vars[dst] =
-                std::move(vars[src]).update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take_move: {
-            auto idx = read<size_t>(in, is_valid_size(vars[src]));
-            IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
-                                     << ").take(" << +idx << ");");
-            vars[dst] = std::move(vars[src]).take(idx);
-            break;
-        }
-        case op_drop_move: {
-            auto idx = read<size_t>(in, is_valid_size(vars[src]));
-            IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
-                                     << ").drop(" << +idx << ");");
-            vars[dst] = std::move(vars[src]).drop(idx);
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
-
-} // anonymous namespace
-
-TEST_CASE("bug: use after free on move-take")
-{
-    SECTION("")
-    {
-        using vector_t =
-            immer::flex_vector<int, immer::default_memory_policy, 2, 2>;
-        auto var0 = vector_t{};
-        auto var1 = vector_t{};
-        var0      = var0.push_back(42);
-        var0      = var0.push_back(42);
-        var0      = var0.push_back(42);
-        var0      = var0.push_back(42);
-        var0      = var0 + var0;
-        var0      = var0 + var0;
-        var0      = var0 + var0;
-        var0      = var0 + var0;
-        var0      = var0.push_back(42);
-        var0      = var0.push_back(42);
-        var0      = var0.push_back(42);
-        var0      = var0.push_back(42);
-        var0      = var0.push_back(42);
-        var1      = var0.push_back(42);
-        var0      = std::move(var0).take(68);
-    }
-
-#if __GNUC__ != 9
-    SECTION("")
-    {
-        constexpr std::uint8_t input[] = {
-            0x0, 0x0,  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1,  0x0,  0x0, 0x0, 0x0,
-            0x0, 0x40, 0x0, 0x0, 0x0, 0x0, 0x4, 0x4, 0x0,  0x0,  0x0, 0x4, 0x0,
-            0x0, 0x0,  0x4, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0,  0x4,  0x0, 0x0, 0x0,
-            0x4, 0x0,  0x0, 0x0, 0x4, 0x0, 0x0, 0x0, 0x4,  0x0,  0x0, 0x0, 0x4,
-            0x0, 0x0,  0x0, 0x1, 0x0, 0x0, 0x0, 0x7, 0x41, 0xb5, 0x0, 0x0,
-        };
-        CHECK(run_input(input, sizeof(input)) == 0);
-    }
-#endif
-}