Bug 21666 – wrong printf format specifier for `real` with -checkaction=context on Win64

When compiling this code on Windows with dmd -m64 -checkaction=context: ``` void main() { assert(real(0.0) == 0.0); } ``` You get: C:\D\dmd2\windows\bin\..\..\src\druntime\import\core\internal\dassert.d(186): Deprecation: argument cast(__c_long_double)v for format specification "%Lg" must be real, not double Which points to this code in miniFormat(): ``` import core.stdc.config : LD = c_long_double; (...) else static if (is(V == real)) len = sprintf(&val[0], "%Lg", cast(LD) v); ```

The underlying issue is this: https://issues.dlang.org/show_bug.cgi?id=20759

*** This issue has been marked as a duplicate of issue 20759 ***

dlang/druntime pull request #3389 "Fix 21666 - Remove deprecations w.r.t. real formatting for checkaction=context" was merged into stable: - 1c57001ba741ea433670eb2877224920f21c8e76 by MoonlightSentinel: Fix 21666 - Remove deprecations w.r.t. real formatting for... ...checkaction=context. These deprecations are issued when `real.sizeof = double.sizeof`. This is a workaround for https://issues.dlang.org/show_bug.cgi?id=20759. https://github.com/dlang/druntime/pull/3389

dlang/druntime pull request #3398 "Merge stable" was merged into master: - 0d7ec8010fffba3ff002f750955e7f8db8e96089 by MoonlightSentinel: Fix 21666 - Remove deprecations w.r.t. real formatting for... ...checkaction=context. These deprecations are issued when `real.sizeof = double.sizeof`. This is a workaround for https://issues.dlang.org/show_bug.cgi?id=20759. https://github.com/dlang/druntime/pull/3398