Merge pull request #3273 from 9rnsr/fix12161

Issue 12161 - ICE with "with" and alias this
Merge pull request #3286 from 9rnsr/fix12201

Issue 12201 - Crash on forward reference import within mixed in template
Merge pull request #3304 from 9rnsr/implicit_pow

[enh] Make explicit importing std.math unnecessary for pow expressions
Conflicts:
	src/e2ir.c
Merge pull request #3328 from 9rnsr/2.065

Pick up changes from master to 2.065 branch