fix: check all extras in version solver dependency filter (#10798)

dimbleby · Copilot · web-flow · commit ead674b4036e · 2026-03-30T19:59:14.000+02:00
in_extras[0] only checked the first extra. Dependencies tied to
multiple extras were undercounted when requested via a secondary
extra, affecting resolution priority ordering.

Co-authored-by: Copilot &lt;223556219+Copilot@users.noreply.github.com&gt;
diff --git a/src/poetry/mixology/version_solver.py b/src/poetry/mixology/version_solver.py
@@ -535,7 +535,8 @@ def _get_comp_key(self, dependency: Dependency) -> CompKey:
                 relevant_dependencies = [
                     r
                     for r in package.requires
-                    if not r.in_extras or r.in_extras[0] in dependency.extras
+                    if not r.in_extras
+                    or any(extra in dependency.extras for extra in r.in_extras)
                 ]
             has_deps = bool(relevant_dependencies)
             num_deps_upper_bound = sum(

Original file line number	Diff line number	Diff line change
`@@ -535,7 +535,8 @@ def _get_comp_key(self, dependency: Dependency) -> CompKey:`
`535`	`535`	`relevant_dependencies = [`
`536`	`536`	`r`
`537`	`537`	`for r in package.requires`
`538`		`- if not r.in_extras or r.in_extras[0] in dependency.extras`
	`538`	`+ if not r.in_extras`
	`539`	`+ or any(extra in dependency.extras for extra in r.in_extras)`
`539`	`540`	`]`
`540`	`541`	`has_deps = bool(relevant_dependencies)`
`541`	`542`	`num_deps_upper_bound = sum(`