Bug 15705 – Invalid memory operation during array growth (@safe code)

See this forum discussion for more context: https://forum.dlang.org/post/[email protected] Consider the following code: [code] import std.stdio; @safe: bool scopeEnded; struct Foo { @disable this(this); this(int val) {writeln("Constructing: ", val, " (", &this, ")"); value = val;} ~this() {writeln("Destroying: ", value, " (", &this, ")"); assert(value == int.init || scopeEnded);} int value; } unittest { Foo[] foos; for (auto i = 0; i < 10000; ++i) { ++foos.length; foos[$ - 1] = Foo(i); } writeln("Scope about to end"); scopeEnded = true; } [/code] This yields (among other output): core.exception.InvalidMemoryOperationError@src\core\exception.d(679): Invalid memory operation This occurs during the failed assertion.

*** This issue has been marked as a duplicate of issue 7349 ***