Bug 24764 – ICE when -vcg-ast prints imported invariant

Reduced from `imported!"std.outbuffer"`: ``` // a.d template imported() { import imported = b; } alias x = imported!(); ``` ``` // b.d struct O { invariant() {} } ``` When compiling `dmd -vcg-ast a.d` you get: ``` core.exception.AssertError@src/dmd/hdrgen.d(1863): Assertion failure ``` The code in question being: ```D void visitInvariantDeclaration(InvariantDeclaration d) { if (hgs.hdrgen) return; if (stcToBuffer(buf, d.storage_class)) buf.writeByte(' '); buf.writestring("invariant"); if(auto es = d.fbody.isExpStatement()) { assert(es.exp && es.exp.op == EXP.assert_); // FAILS, it's EXP.call buf.writestring(" ("); (cast(AssertExp)es.exp).e1.expressionToBuffer(buf, hgs); buf.writestring(");"); buf.writenl(); } else { bodyToBuffer(d); } } ```

@dkorpel created dlang/dmd pull request #16917 "Fix bugzilla 24764 - ICE when -vcg-ast prints imported invariant" fixing this issue: - Fix bugzilla 24764 - ICE when -vcg-ast prints imported invariant https://github.com/dlang/dmd/pull/16917

dlang/dmd pull request #16917 "Fix bugzilla 24764 - ICE when -vcg-ast prints imported invariant" was merged into stable: - c52c26276b6dc70054bbd6eac58c4d13445ab16b by Dennis Korpel: Fix bugzilla 24764 - ICE when -vcg-ast prints imported invariant https://github.com/dlang/dmd/pull/16917

dlang/dmd pull request #16967 "Rebase stable6" was merged into master: - c58361f46f9a4b20d8933a397d1ca34db2a40b65 by Dennis: Fix bugzilla 24764 - ICE when -vcg-ast prints imported invariant (#16917) Co-authored-by: Dennis Korpel <[email protected]> https://github.com/dlang/dmd/pull/16967

dlang/dmd pull request #17069 "Merge stable" was merged into master: - e0259d92e7fada37ae5c8e784704056f8a5aefd0 by Dennis: Fix bugzilla 24764 - ICE when -vcg-ast prints imported invariant (#16917) Co-authored-by: Dennis Korpel <[email protected]> https://github.com/dlang/dmd/pull/17069