go/types: compiling hangs

Question

go/types: compiling hangs

dvyukov opened this issue 10 years ago · 6 comments

The following program takes 1+ hours to compile, aborted after that:

package a
var g = 1e81391777742999

Package should either analyze it in a reasonable amount of time (seconds) or give an error if it cannot chew it. Compiling a single line of code for hours does not make sense.

on commit af81789

griesemer commented 10 years ago

Started.

Answer 1 · 2015-06-29T17:37:49.000Z

I propose that gc/types employ exactly the same logic as gc compiler:
https://go-review.googlesource.com/#/c/11673/1/src/cmd/compile/internal/gc/mparith3.go

Answer 2 · 2015-11-18T15:18:19.000Z

Both go tool vet and the command vet hang in this case.

Answer 3 · 2015-11-30T17:03:05.000Z

This one is important. @griesemer, can you take a look? Thanks.

Answer 4 · 2015-12-01T00:44:42.000Z

The largest decimal exponent that needs to be accepted is 646456992 (approx. 2**MaxInt32). See also issue #11326.

Answer 5 · 2015-12-09T00:00:13.000Z

CL https://golang.org/cl/17360 mentions this issue.