1456057 - Fail to build with msvc 19.13.26131.1 - error: '_Ty' does not refer to a value

Status: RESOLVED WONTFIX

(Firefox Build System :: General, defect)

Description

[Mark Hammond [:markh] [:mhammond]]

Attachment: out

Trying to build with the latest VS2017, latest mozilla-build, a current central and immediately after running 'mach bootstrap', I get the error:

> 0:14.56 C:\PROGRA~2\MIB055~1\2017\ENTERP~1\VC\Tools\MSVC\1413~1.261\include\type_traits:900:47: error: '_Ty' does not refer to a value
> 0:14.56 C:\PROGRA~2\MIB055~1\2017\ENTERP~1\VC\Tools\MSVC\1413~1.261\include\type_traits:898:16: note: declared here
> 0:14.56 C:\PROGRA~2\MIB055~1\2017\ENTERP~1\VC\Tools\MSVC\1413~1.261\include\type_traits:901:2: error: expected class name
> ...
> 0:14.57 thread '<unnamed>' panicked at 'Failed to generate bindings, flags: ...
> 0:14.57 thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Any', libcore\result.rs:945:5

This has the same symptoms as bug 1423307 - however, in that bug the fix was to update to a newer clang, specifically r319785. However, 'mach bootstrap' appears to already grab a later version - I see:

> $ ~/.mozbuild/clang/bin/clang.exe --version
> clang version 7.0.0 (trunk 328769)
> Target: x86_64-pc-windows-msvc
> Thread model: posix
> InstalledDir: o:\home\.mozbuild\clang\bin

Attached is the configure and build log.

Comment 1

[Kim Moir [:kmoir] ET]

notes from triage: options
1) change default behaviour of configure to show toolchains supported, otherwise you need a flag
2) bootstrap - need to to install correct version3
3) we need to stay better on top of VS upstream versons

Comment 2

[(not currently active) Ted Mielczarek]

Fixing bug 1446030 might also help to surface these kinds of errors earlier in configure, although it doesn't help you get a working build.