[GNATS 22056] internal error: read_memory_region: not all expected entries were read

[jhsedg]

Customer bug ID

boost/index_if; gnats/22056a.C (reduced test), gnats/22056.C full expanded test

Description

​Gnats 22056.C is the full expanded test
​gnats 22056a.C is the reduced test case
​
​
​template struct e { static constexpr int c = a; };
​template auto d(0);
​struct j {
​ typedef e<1> g;
​};
​template struct k;
​template struct n { typedef k g; };
​template <bool, typename h, typename> using i = typename n::g;
​template <typename, typename = void> struct o;
​template struct p;
​template <typename l, typename> struct o : o<l, p> {};
​template <typename l, bool ad> struct o<l, p> { using g = l; };
​template struct q { using g = j::g; };
​struct aw {
​ template <typename m, typename ax>
​ constexpr auto operator()(m &&, ax &&) const;
​} a;
​template <typename m, typename ax>
​constexpr auto aw::operator()(m &&r, ax &&s) const {
​ using au = typename o::g;
​ using bb = i<0, au, int>;
​ return bb::t(r, s);
​}
​template struct H {
​ template <typename m, typename ax>
​ using f = typename H<bool(q<decltype(d)>::g::c)>::template f<m, ax>;
​};
​template <> struct H { template <typename, typename> using f = int; };
​template struct k {
​ template <typename m, typename ax>
​ static auto t(m, ax) -> H::f<m, ax> {}
​};
​void fn1() {
​ auto b = [] {};
​ decltype(a(fn1, b)){};
​}
​fe_only -DTEST_NUMBER=1 --gnu_version=80100 -w --no_inlining --c++17 Test_name.c
​IL entry write-read difference: region number 80
​ entry kind = 7 (variable), written = 62, read = 55
​ missing entry = 22
​ missing entry = 28
​ missing entry = 34
​ missing entry = 40
​ missing entry = 46
​ missing entry = 52
​ missing entry = 58
​"Test_name.c", line 6618 (col. 5): internal error: read_memory_region: not all
​ expected entries were read
​
​1 catastrophic error detected in the compilation of "Test_name.c".
​Compilation aborted.
​Aborted
​eccp: front end returned an exit status of 134