Bug 20778 – exception messages with nulls within are treated inconsistently

``` throw new Exception("hello\0world!"); ``` As of DMD 2.091.1, the printed message is inconsistent between platforms. On windows, the full string is printed. on other platforms, only "hello" is printed. I would expect the entire string to be printed in all cases, but it seems some code in druntime expects the latter case instead (see core.internal.array.casting.onArrayCastError, for example). This inconsistency appears to have been introduced between 2.064 and 2.065, when the default exception printer was changed from using write() to fprintf() on non-windows platforms.

@MoonlightSentinel updated dlang/druntime pull request #3787 "Fix 20778 - Ensure that _d_print_throwable prints the entire message" fixing this issue: - Fix 20778 - Ensure that _d_print_throwable prints the entire message The previous implementation simply forwarded the pointer + length to `fprintf` and didn't check the return value. This caused the message to be truncated for the following cases: - it contains `\0` (the bug report) - the length is greater than `int.max` This commit changes the implementation s.t. it checks the character count written to `stderr` (the return value) and prints the remainder of the string if necessary. https://github.com/dlang/druntime/pull/3787

dlang/druntime pull request #3793 "merge stable" was merged into master: - 84e429a7c7c99ebae6e72de2f2be3069266394a5 by MoonlightSentinel: Fix 20778 - Ensure that _d_print_throwable prints the entire message The previous implementation simply forwarded the pointer + length to `fprintf` and didn't check the return value. This caused the message to be truncated for the following cases: - it contains `\0` (the bug report) - the length is greater than `int.max` This commit changes the implementation s.t. it uses `fwrite` instead which doesn't stop at `\0` and (theoretically) supports lengths up to `size_t.max` - 13441f120f669571c5941c5cef3196e7fd9d3a95 by Razvan Nitu: Merge pull request #3787 from MoonlightSentinel/truncated-exception-message Fix 20778 - Ensure that _d_print_throwable prints the entire message https://github.com/dlang/druntime/pull/3793

*** Issue 21480 has been marked as a duplicate of this issue. ***