Bug 13992 – [REG2.067a] CTFE produces strange error with += operator on integer type

Code: ------ void addListener() { void delegate() tmp; enum typehash = hashOf(tmp.mangleof.ptr, tmp.mangleof.length); //hash_t typehash = hashOf(tmp.mangleof.ptr, tmp.mangleof.length); } @trusted hashOf( const void* buf, size_t len, hash_t seed = 0 ) { auto data = cast(const (ubyte)*) buf; auto hash = seed; data += 2 ; // <---- this is line 11 hash += *data; return hash; } ------ Tested compiler: dmd git HEAD. Compiler output: ------ eventloop.d(11): Error: integral constant must be scalar type, not const(void) ------ Note that if the "enum typehash" line is commented out and the following line uncommented, it works fine. This suggests that it's a CTFE issue. Both the "data += 2" and "hash += *data" lines are necessary; deleting either one makes the error message go away. This code is reduced from a larger failing codebase that used to compile fine with earlier versions of dmd.

Introduced in: https://github.com/D-Programming-Language/dmd/pull/4227 https://github.com/D-Programming-Language/dmd/pull/4304

Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/c8d49c79d3a68b509b1046f4280169232b6f52db fix Issue 13992 - CTFE produces strange error with += operator on integer type https://github.com/D-Programming-Language/dmd/commit/2ec6abc0d5eafdf44a84405d9457ea9ad5199025 Merge pull request #4304 from 9rnsr/fix13992 [REG2.067a] Issue 13992 - CTFE produces strange error with += operator on integer type

Commits pushed to 2.067 at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/c8d49c79d3a68b509b1046f4280169232b6f52db fix Issue 13992 - CTFE produces strange error with += operator on integer type https://github.com/D-Programming-Language/dmd/commit/2ec6abc0d5eafdf44a84405d9457ea9ad5199025 Merge pull request #4304 from 9rnsr/fix13992