1812962 - Improve error message when static component creation fails

Status: NEW

(Core :: XPCOM, enhancement)

Description

[Jens Stutte [:jstutte]]

If a component creation fails we will find in our logs messages like:

 2:03.94 GECKO(3103924) [Parent 3103924, Main Thread] WARNING: NS_ENSURE_TRUE(inst) failed: file StaticComponents.cpp:10270
 2:03.94 GECKO(3103924) [Parent 3103924, Main Thread] WARNING: NS_ENSURE_TRUE(inst) failed: file StaticComponents.cpp:11376

Tracing back those messages to the causing components is not always easy as StaticComponents.cpp is generated code, such that line numbers can vary randomly between platforms and builds.

lower_constructor should have all the needed information to improve these messages to point us directly to the causing module, which may raise the chance that someone files a bug for it.