pub upgrade hanging

[DartBot]

<img src="https://avatars.githubusercontent.com/u/3227777?v=3" align="left" width="96" height="96"hspace="10"> Issue by rbishop-bah
Originally opened as dart-lang/sdk#23347

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Build that was working until this morning now hanging on pub upgrade, presumably due to just-released polymer, web_components, smoke, observe, etc. packages.

pub upgrade --verbose shows the pub solver churning endlessly.

What version of the product are you using?
1.10.0

On what operating system?
Win 7 x64

[DartBot]

<img src="https://avatars.githubusercontent.com/u/3227777?v=3" align="left" width="48" height="48"hspace="10"> Comment by rbishop-bah

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Actually, pinning unittest: "^0.11.0" gets things working again so it appears pub upgrade is getting confused by having unittest 0.12.0 as an option.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/8631949?v=3" align="left" width="48" height="48"hspace="10"> Comment by floitschG

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Added Area-Pub, Triaged labels.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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This is a duplicate of issue #874. Pub's version solving algorithm can run into cases where it goes exponential, and it looks like you've found one of those cases.

If you can provide the pubspec that caused this issue, it may help us add more heuristics to avoid it in the future.

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Added Duplicate label.
Marked as being merged into #874.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/3227777?v=3" align="left" width="48" height="48"hspace="10"> Comment by rbishop-bah

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name: xxx_webapp
environment:
  sdk: '>=1.9.0 <2.0.0'
dependencies:
  browser: any
  core_elements: "^0.7.0"
  intl: any
  logging: any
  paper_elements: "^0.7.0"
  polymer: "^0.16.0"
  bwu_fontawesome_iconset_svg: "^0.1.1"

  ... + some locally hosted packages that i don't want to share publicly....
dev_dependencies:
  unittest: "^0.11.0" ----> hangs when any
dependency_overrides:
  # to get polymer, core_elements paper_elements to coexist with bwu_fontawesome_iconset_svg
  core_elements: "^0.7.0"
  paper_elements: "^0.7.0"
  polymer: "^0.16.0"
transformers:

• polymer:
      entry_points: [web/index.html]

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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Your locally-hosted packages may be relevant here. Without them (and changing the "unittest" dependency to "any"), I get the following error quickly:

Incompatible version constraints on matcher:

• quiver 0.21.3 depends on version >=0.10.0 <0.12.0
• test 0.12.0 depends on version >=0.12.0 <0.12.1

...although I'm not sure why adding a looser constraint produces the error.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/3227777?v=3" align="left" width="48" height="48"hspace="10"> Comment by rbishop-bah

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I believe the additional transitive dependencies from the local packages would be:

  browser_detect: "^1.0.3"
  color_picker: "^1.1.4"
  collection: "^1.1.0"
  intl: "^0.12.1"
  logging: ">=0.9.3 <0.11.0"
  meta: "^0.8.8"
dev_dependencies:
  benchmark_harness: "^1.0.4"
  browser: "^0.10.0"

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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It still fails quickly for me.

Don't worry about it too much, we've got other pathological pubspecs we can look at.